Ultrasound Techniques: Evaluating the GI Tract

An abdominal ultrasound is a tool that can help you with visualizing and diagnosing a variety of conditions in your canine and feline patients.

Today, we’ll be talking about evaluating the gastrointestinal tract.

Depending on your patient, you may be doing an ultrasound exam of the stomach, small intestines, and colon to look for…

• Inflammation and wall thickening

• Foreign bodies

• Neoplasia

• Pyloric outflow obstructions

• Intussusceptions

• Enlarged mesenteric lymph nodes

This isn’t an exhaustive list…

But basically, if the patient is having GI symptoms and your x-rays haven’t provided the answer you need, an ultrasound is often a good next step.

That’s because it provides more details about tissue structure in real-time, as opposed to just the silhouette of radiographs. Often, x-rays and ultrasound work well together.

It may take a little bit of practice, but with experience you can catch on to ultrasound technique and do your ultrasound exams in-house rather than referring.

Here are a few tips for getting the diagnostic information you need during a simple ultrasound evaluation of the GI tract…

• If possible, have the patient fast beforehand. That way, you can get a clear picture of the GI tract without a lot of food or fecal matter to block your view of certain structures or create artefacts such as shadowing. You can also consider an enema if needed.

• Position the patient. Dorsal recumbency is most common, although lateral recumbency may also be used, especially for visualization of deeper structures. Use a trough for comfort, and if appropriate consider sedation (most patients don’t need to be sedated, though).

• Experts recommend having a systematic approach to look at the entire abdomen. Whichever viewing order works best for you, it’s good to be consistent so nothing is forgotten. And, the GI tract will be an important part of your evaluation.

• Choose a machine and probe that work best for your needs, then practice and develop comfort using the different settings, especially adjusting depth and gain (brightness). That way, you can focus on seeing what you want to see, rather than fussing with settings during your ultrasound exam.

• Start at the stomach by locating it just caudally to the liver. Rock and fan the probe to systematically obtain orthogonal views of the whole stomach from fundus to pylorus.

• Next, examine the intestines and cecum. 

  • The duodenum, ileum, cecum, and colon are examined individually. 

  • For the jejunum, you don’t need to follow every loop from beginning to end. Instead, scan the abdomen starting at the level of the stomach. Slide or sweep the probe from side to side, gradually moving cranially to caudally until you’ve visualized the entire field (usually you would stop at the level of the urinary bladder trigone).

• Along the way, take notes to help you prepare your report for your patient’s medical record. Be sure to include what was normal, as well as any abnormalities you found, such as masses or thickened intestinal walls. 

While scanning, you can freeze images for your records and take measurements if you feel anything may be enlarged.

When you develop your ultrasound skills, having this tool at your disposal can often give you quick information when you need it—for example, looking for a GI mass or obstruction when x-rays were inconclusive.

It’s a great way to offer an additional service to your patients and clients, and possibly to stand out from other clinics in your region.

Written by: Dr. Tammy Powell, DVM

A Beginner’s Guide to Pathology Using Ultrasound

Sometimes, radiographs just don’t show the whole picture…

That’s especially true for analyzing the details of soft tissue structures—especially in the abdomen, but in other parts of the body as well.

Limitations of radiographs

One problem you may run into with radiographs is a “silhouette sign,” which basically means that two areas with a similar opacity border one another in your x-ray views. This makes it difficult to tell where one structure begins and the other ends.

A good example of a silhouette that could cause confusion is when the abdomen is full of fluid. Since fluid is approximately the same opacity as the abdominal organs, they may blend together, making it difficult to evaluate the abdominal structures.

In cases like this, an ultrasound can provide additional information. And, ultrasound has many other uses…

What an ultrasound is especially useful for

Radiographs can provide a lot of valuable information. But, they can’t always provide fine detail about texture, small defects, or other abnormalities of soft tissue structures. That’s especially true if the abnormalities don’t result in a big change in opacity or in organ size.

Therefore, ultrasound is often superior for detecting changes within an organ, especially if the change is small, in the early stages of a disease, or otherwise difficult to view on radiographs.

This may include conditions such as…

• Nodules or masses within an organ such as the liver, which aren’t large enough to change the radiographic silhouette/size of the organ.

• Pancreatitis or certain other disorders of the pancreas.

• Calculi of the urinary bladder that are radiolucent.

• Details of the gallbladder, an organ that is often difficult to see on radiographs since it is overshadowed by the liver.

• Abnormal blood vessels, such as a portosystemic shunt.

• Detailed cardiac evaluation, including diagnosing enlargements, congenital abnormalities, neoplasia, and more.

These are just a few examples—an ultrasound has many uses clinically!

Of course, there are some lesions that are better diagnosed using radiographs rather than ultrasound, especially in areas of the body that don’t transmit sound waves well (such as the lungs).

And, by looking at your x-ray views and ultrasound study together, you’ll get more information than you would with either technique by itself. 

So, it’s not a matter of choosing between radiographs and ultrasound—instead, they work very well when used together to see the whole clinical picture.

How to use an ultrasound

It takes some experience to get the hang of directing your ultrasound probe and interpreting the images. Taking a course is often the best and fastest way to become proficient.

However, even though the process of performing an ultrasound study is different from obtaining radiographic views, some of the basic principles of interpretation remain the same for both. 

Rely on the same good practices you do when reading a radiograph, such as…

• Have a system and evaluate each organ (and spaces between the organs) in an order that works for you. Do it the same way each time, to be sure you don’t miss anything.

• Examine cross-sectional images together—meaning views that are 90-degrees apart—of each area of study. An ultrasound, like an x-ray, produces a two-dimensional image. So, you’ll want to move the probe to look at each area at different angles (just like orthogonal views provide a complete picture when taking radiographs).

• When in doubt, seek a consultation with a radiologist who can help you interpret your images.

Just like any other part of your clinical skills, ultrasound technique and interpretation will come with time.

After all, they call it clinical “practice” for a reason—practice makes perfect. 

But with a little time, you’ll likely see a good ROI on your investment, since you can diagnose in-house rather than referring—and may find your ultrasound very useful if you need more diagnostic information in a pinch.

Ask for a free demo at your hospital to learn more.

Written by: Dr. Tammy Powell, DVM

Diagnosing Tumors Of The Heart In Dogs And Cats

Cancers of the heart are uncommon in dogs and cats. When they do occur, it’s important to differentiate a tumor from other conditions that could cause generalized or focal enlargement of the heart and cardiovascular symptoms.

Which Cancers Occur In Cardiac Tissues?

A cancerous lesion based at the heart could be a primary tumor, or due to metastasis. 

Primary tumors that occur at the heart include:

• Hemangiosarcomas—the most common heart cancer in dogs, usually occurring at the right atrium. These occur most frequently in larger dogs with longer noses, such as Golder Retrievers, Doberman Pinschers, and German Shepherds.

• Chemodectomas, also known as aortic body tumors or heart base tumors. Generally thought to be slow-growing, these tumors occur most commonly in brachycephalic breeds like Boxers, Bulldogs, and Boston Terriers.

• Myxomas.

• Sarcomas.

• Ectopic thyroid tumors.

• Lymphoma/lymphosarcoma—the most common heart cancer in cats.

Other cancers are possible, but these are the most commonly diagnosed types. Breeds may vary as noted above, but most pets with tumors of the heart are middle-aged or older. 

How Are Heart Tumors Diagnosed?

If slow-growing, tumors near the heart base are often an incidental finding, seen on thoracic radiographs that are taken for another reason.

Other times, diagnostics are pursued because of clinical symptoms—which are often sudden in onset.

Once a mass is large enough to push on the heart and major blood vessels, many cardiovascular symptoms are possible, such as:

• Coughing

• Ascites

• Lethargy

• Weakness

• Vomiting

• Loss of appetite

• Difficulty breathing

• Collapse

• Sudden death

Note: If a dog presents with some of these symptoms, especially sudden weakness and collapse, a quick ultrasound scan may help to identify pericardial effusion and aid in guiding a needle for emergency pericardiocentesis.

Finding Heart Masses Early

As with most cancers and disease processes, discovering a problem earlier rather than later can allow for more treatment options.

General screening radiographs or ultrasound checks—such as with a senior wellness health check—can be a good opportunity to discover heart base tumors before they cause cardiovascular dysfunction and symptoms.

An echocardiogram performed via ultrasound can help to provide more information on the location, size, and invasiveness of the mass. 

In some cases, a presumptive diagnosis may be made based on the appearance and location of the mass on an ultrasound study, along with the patient’s signalment. If possible to perform without undue risk, an ultrasound-guided aspirate of the mass can provide more information about which type of tumor is present.

Treatment Options For Cancers Of The Heart

Treatment will be based on the type of neoplasia, how fast the mass is growing, whether metastasis is present, and whether or not the pet is symptomatic.

When a tumor of the heart is diagnosed, a good next step is to screen for metastasis and concurrent conditions via chest x-rays (if not already done), bloodwork, lymph node evaluation, and abdominal ultrasound.

Once a diagnosis is made, treatment options may include:

• Periodic monitoring with a cardiologist (especially for slow-growing chemodectomas/heart base tumors) prior to pursuing more invasive treatments.

• Surgery to remove the tumor.

• Pericardiectomy to remove the pericardium and prevent life-threatening cardiac tamponade or pericardial effusion. 

(A pericardiocentesis may be necessary on an emergency basis prior to diagnostics in a pet who presents with acute symptoms. After that, a planned pericardiectomy can help to prevent further emergency episodes of fluid buildup around the heart.)

• Chemotherapy, often in conjunction with surgery.

• Radiation therapy—either conventional, or via Cyberknife therapy.

Even though cancers of the heart are uncommon in pets, they can be scary to pet owners because of the possibility of sudden onset of serious clinical symptoms (especially with hemangiosarcomas).

By performing diagnostics, referring to specialists as needed, and giving your clients as much information as possible, you can help them make an informed decision for their pet.

Disclaimer: This article is for general informational purposes only, and not intended as a guide to the medical treatment of any specific animal.

Written by: Dr. Tammy Powell, DVM

Ultrasound Techniques: Visualizing the Adrenal Glands

The adrenal glands, those tiny but very important glands, can be tricky to find and evaluate during an ultrasound exam.

However, having a system and knowing where to look can make your job much easier.

There are many reasons you want to visualize the adrenal glands on every scan, including checking for neoplasia and other masses and looking for any changes that could be associated with Cushing’s or Addison’s disease.

Here are some tips to help save you time and allow for a clearer view of these small glands…

Have a repeatable system

When you perform an abdominal ultrasound, it’s important to have a systematic approach to look at everything. And that includes keeping small structures like the adrenal glands and abdominal lymph nodes on your list, so they don’t get overlooked.

Do your scan in the same order every time—whether that’s cranial to caudal, clockwise, or some other system that works for you—and it’s much less likely that anything will be missed or any abnormalities overlooked.

Adrenal gland landmarks

The right and left adrenal glands are respectively located near the right and left kidneys. However, the kidneys are relatively large, whereas the adrenal glands are small. So, the kidneys can overshadow these small glands.

The kidneys are the first things you’ll locate because they’ll point you in the right general direction. After that…

Vascular landmarks are most helpful when it comes to locating the adrenals.

Specifically, the aorta, caudal vena cava, renal vessels, and mesenteric artery are what you’re going to be looking for.

Color Doppler can help you visualize the vessels.

Also note, if the patient allows you to apply gradual pressure, it helps to minimize the distance between your probe and the glands as much as possible.

Finding the LEFT adrenal gland

The left adrenal gland is located ventrolateral to the aorta and cranial to the left renal artery. 

Start by scanning the left dorsal mid-abdomen and visualizing the aorta in a long view. 

Find the spot where the left renal artery branches off from the aorta, and just cranial to that you’ll see the left adrenal gland.

Finding the RIGHT adrenal gland

The right adrenal gland is dorsolateral to the caudal vena cava, and just cranial to the cranial mesenteric artery. It’s also more cranial and dorsal compared to the left adrenal gland.

Scan the right cranial abdomen, with the caudal vena cava in long view.

Apply some pressure with the transducer which will cause compression of the caudal vena cava and help you visualize the right adrenal gland. The gland is right next to the vessel, slightly oblique to it.

Are the adrenal glands normal?

Evaluate the qualitative properties of the gland, and then measure the glands from their cranial pole to caudal pole. Also, measure the thickness of each pole.

Normal adrenal glands are hypoechoic to surrounding fat, and have a characteristic “peanut” shape (although the right adrenal may have more of an “arrowhead” appearance). Typically, adrenals are 4-7mm thick in dogs and 3-4mm thick in cats. 

Abnormalities may include…

• Evidence of hyperadrenocorticism. 

  • If pituitary-dependent, the adrenal glands may be normal in appearance, or they may be “plump” (symmetrically enlarged). An ultrasound exam alone is not enough to diagnose Cushing’s, but may be helpful in context with additional diagnostic tests.

  • If adrenal-tumor related, you may be able to visualize a mass. 

• Evidence of Addison’s disease or hypoadrenocorticism.

  • You may notice smaller or thinner adrenal glands. As with Cushing’s, you’ll want to use this information in conjunction with clinical symptoms and other diagnostic tests.

• Adrenal masses.

  • Many are incidental findings only.

  • Pheochromocytoma is a possibility.

  • Malignancies are possible and may lead to invasion of adjacent tissues, especially blood vessels. 

  • You’ll use your clinical judgment and the patient’s clinical signs to help you determine whether more diagnostics are needed, or to start by monitoring the growth with repeat ultrasound exams over time.

• Age-related changes.

  • Nodular changes and remodeling may be normal in old adrenal glands. Practice will help to develop clinical judgment of what’s normal and what’s not.

The ability to find the adrenal glands quickly will come with experience, and knowing the right tips and techniques will make it easier to get the information you need even when you’re first learning.

Written by: Dr. Tammy Powell, DVM

10 Steps To Complete Dental Cleaning Procedures In Dogs & Cats

Ensure a pre-anesthetic checklist has been performed to include thorough patient history, physical examination, lab work, chest x-rays, and prophylactic medication use has been considered, particularly in the senior patient.

Ensure all equipment is functioning properly and that all essential instruments are available and sanitized. Ensure the CPR plan and CPR medications are in place, as well as resuscitation status for each patient. 

Provide a safe heat source such as a warm air blanket.

Continually check the patient by placing your hand directly on the patient under the heat source. Include this step on your anesthesia monitoring sheet.

Ensure the patient is warm during the pre-anesthetic phase where a patient’s body temperature can lower.

1. During the onset of anesthesia while intubating, use caution when handling the tongue, ensuring it is not pulled forcefully. Gently place the patient in position – note; placing a pet on their back during the entire procedure minimizes anesthesia time and is an effective and expeditious way to perform a dental.

Ensure the tracheal tube is adequately inflated, and an aspiration guard or gauze is in place. Consider the use of intraoral suction to prevent aspiration of water and debris during the procedure.

Continually replace gauze as it becomes saturated with water. Continually check the tracheal tube during the procedure as it may need adjusting depending on the depth of anesthesia and tracheal relaxation

2. While under anesthesia, take before and after photographs of all areas of the mouth to show the pet parent, as well as keep for documentation in the medical record.

3. Begin by irrigating the pet’s mouth with a dilute Veterinary Oral Health Council approved Chlorhexidine based rinse such as CET. Evaluate the oral cavity, and remove obvious calculus at this time to expose gingiva and soft tissues.

4. Perform intraoral regional nerve blocks prior to probing the teeth and gingival tissues, as this procedure may cause pain in the anesthetized patient, requiring a deeper plane of anesthesia. 

5. Thoroughly probe and chart each tooth, and perform full-mouth radiographs

6. Clean the teeth, perform extractions, and required orthodontic procedures needed. Ensure hand scalers and a curette are employed to remove subgingival calculus, particularly where periodontal pockets have been identified.

7. Thoroughly irrigate and lavage away oral debris.

8. Polish all surfaces of each tooth and subgingival areas thoroughly and carefully.

9. Rinse the mouth and each tooth with air and water and ensure all debris is removed from the tongue. Take post-procedure photographs.

10. Finally, apply a plaque prevention gel or dental sealant

Recover the patient quietly and employ pain management and anti-inflammatory medication. The post-anesthetic patient should be monitored closely post-surgically.

Written by: Dr. Tammy Powell, DVM

Post Dental Maintenance Of Dogs & Cats

Much attention is focused on the time leading up to and during dental work in dogs and cats, with much attention being placed on the dental procedure itself.

Without education of the pet parent, preventative care can fall to the wayside, leading to continued periodontal problems in the pet. 

Dental calculus can form hours after teeth cleaning, thus making the education of the pet parent a vital part of their pet’s dental health.

Properly educating the pet parent about post-dental preventative care entails a recheck visit a week or sooner after the dental, where the pet’s mouth is rechecked, handouts and dental preventative products are introduced to the pet parent, and a demonstration performed to demonstrate proper oral care techniques.

The best way of preventing gum and tooth disease in dogs & cats is to actively brush the pet’s teeth at least 3 to 4 times weekly.

There are some excellent products, including enzymatic toothpaste-like C.E.T. which can break down much of the tartar and debris on the teeth. 

During their recheck examination, pet parents can be shown how to brush their pet's teeth using a standard toothbrush, finger brush, and even gauze.

Emphasis should be placed on emphasizing the importance of making the effort to get the habit of home oral care started.

Other products that the pet parent can offer their dog or cat are chewable products such as C.E.T Hygiene chews, Greenies, and other over the counter dental products such as powders, sprays, and gels, as well as water additives.

During the post dental recheck visit, importance should be placed not only on the aforementioned but mentioning diet as well.

Pets eating canned food may be more susceptible to periodontal disease due to the sugars in the food, as well as the wet food sticking to the teeth.

Regular visits to the veterinarian for an oral health exam can give the pet owner an indication of how well they are maintaining the oral health of their pet.

Written by: Dr. Tammy Powell, DVM

What Could You Miss Without Dental Radiographs?

When it comes to dentistry, sometimes teeth are like icebergs—there’s a lot going on “below the surface.” In this case, under the gumline. 

Unfortunately, the parts of the tooth you can see don’t always tell the whole story. 

That’s where dental radiography comes in.

Here are a few situations when dental x-rays could make your client communications easier, help you provide better patient care, and improve your bottom line…

Finding pesky root tips

If you’re extracting a tooth with a fractured root—whether the root splintered prior to the dental procedure or the tip happened to break off during a difficult extraction—you generally want to be sure you’ve removed each and every piece.

In many cases, root tips left behind can lead to infection, pain, or an abscess, plus another procedure to retrieve the piece and an unhappy client.

Radiographs help because you have confirmation that you’ve removed all pieces of the tooth roots.

For extractions, it can be useful to take “before and after” images that clearly document the successful removal of the tooth and its root(s).

Informing owners of the risk of jaw fractures

Sometimes, periodontal disease has caused so much bone loss that it leads to a pathological fracture in the jaw.

Or, the jaw could have so much bone loss that there’s a high risk of iatrogenic jaw fracture during a dental procedure and extraction.

You can probably imagine what could go wrong without radiographs…

When you extract the bad tooth, a jaw fracture can occur if that area of the mandible is already severely compromised due to disease and bone loss. But without radiographic proof of the underlying condition, the client may be inclined to blame your technique, rather than recognizing the severity of their pet’s periodontal disease.

Taking radiographs beforehand helps to set up realistic expectations of risk.

Discovering retained and impacted teeth

Whenever teeth are missing, dental x-rays are a good idea.

Sometimes, below the gumline, you’ll find retained or impacted teeth. Left in place, they could lead to dentigerous cysts or other problems.

Without radiographs, these “hidden” teeth can be difficult to find and treat.

Detecting damage to neighboring teeth

Maybe there’s one tooth that’s obviously bad… But, bone loss and infection have also affected the integrity of the neighboring teeth.

Dental radiographs will help you determine whether or not neighboring teeth are viable. And, the images provide tangible evidence that a neighboring tooth needs to be extracted.

This visual aid can make it easier to show a client exactly what you’re talking about, and help to reinforce your recommendations.

And more…

Dental radiographs can also help you look for oral neoplasias, feline resorptive lesions, tooth root abscesses, and more.

Sometimes this will help to confirm your clinical suspicions based on the patient’s presentation and symptoms. Other times, the findings may come as a surprise—allowing you to treat before the problem becomes worse.

With all the information dental x-rays provide, they can really help you create a thorough treatment plan that covers everything a patient needs during their dental procedure.

Your treatment recommendations can help to improve your dentistry revenue. And, importantly, your dental images can also help you provide excellent patient care and increase client knowledge and compliance.

Ask us about a free demo for your hospital, to see how dental radiography can fit into your practice space and daily appointment flow.

Written by: Dr. Tammy Powell, DVM

Take The Frustration Out Of FORLs

To extract or not to extract that tooth root?

Is a crown amputation all that’s needed?

When it comes to feline odontoclastic resorptive lesions (FORLs), these may be the questions you’re asking yourself.

FORLs can cause loss of the protective surfaces (enamel, cementum, and dentin) of both the crown and the root(s) of a tooth, resulting in pain.

These lesions come in two varieties:

• Type 1: Where the root appears radiographically normal.

• Type 2: Where the root is radiographically hard to distinguish from the surrounding bone, with loss of visibility of the periodontal ligament space.

As you know, the treatment for these lesions is different—full extraction of the root(s) for Type 1, versus just a crown amputation for Type 2.

Performing a crown amputation and leaving a root in place for Type 1 could result in problems or complications, not to mention continued pain for the patient.

On the other hand, trying to extract the root of a true Type 2 lesion could be a monumental task and a big headache.

So, it’s very important to determine what type of lesion you’re dealing with. Here’s how…

Diagnosing FORLs

Patient presentation

A client brings their pet to you because of halitosis, food dropping, and occasional jaw chattering. 

During the physical exam, you notice bright red, inflamed gums and gingival hyperplasia near one of the mandibular premolars. 

You suspect a FORL—and given that FORLs are one of the most common dental problems in cats, you’re probably right.

You suggest a dental procedure, including dental radiographs, a full cleaning, oral exam, and possible extraction. The client agrees with the plan.

The day of the procedure

After the patient is anesthetized, your technician obtains radiographic images of the entire mouth, which takes just a few minutes to perform.

Then, you look at the radiographs in conjunction with your oral exam.

While probing the tooth in question, you feel a rough patch under the gingival hyperplasia, consistent with a resorptive lesion.

The x-ray confirms your diagnosis. 

Determining the best treatment plan

In this case, the patient’s tooth is clearly Type 1, with a periodontal ligament space still visible. So, you perform a full extraction.

While evaluating the dental rads, you also notice the premolar on the opposite side is starting to show radiographic evidence of a lesion.

Even though it’s mild, you call the owner and inform them of the likelihood of progression. 

To prevent a painful lesion from developing between dentals, the owner decides to go forward with a pre-emptive extraction of that tooth as well.

Documenting the extraction

In addition to being an integral part of your treatment plan decisions, dental radiographs can also help you document that extraction was performed successfully.

A post-procedure x-ray image is a great way to document that there are no root tips left behind.

And, in cases where a crown amputation was indicated, dental rads provide visual proof that this was an appropriate treatment course.

In this way, dental radiographs not only help you to plan and implement a very high quality of medicine—but they also give you peace of mind and are a valuable part of your medical records.

Talking to clients about dental radiographs

Maybe you already know the benefits of dental radiography—but you’re concerned about discussing the additional cost with clients. 

Often, it helps to include the x-rays as part of the dental procedure package. List them on the estimate so the client understands the value they are receiving—just don’t itemize the cost of the radiographs separately. 

Be sure to adjust the estimate of the dental package accordingly, to cover your costs. And remember, with a monthly payment plan for your dental radiography system, just a couple of dental procedures per month can cover your investment.

Client education also helps. Explain how the results of the radiographs allow you to provide the best possible treatment and reduce the likelihood of future complications.

With clients who want the best for their pets, it’s a win-win for both of you.

Written by: Dr. Tammy Powell, DVM

5 Tips for Radiation Safety During Uncertain Times

Your x-ray unit is something you use frequently—probably every day, or multiple times per day—in your practice.

You know radiation safety is important. But recently, if you’ve had to reduce the number of team members in the building at any given time, maybe it feels like there aren’t enough hands on deck for patient restraint and positioning.

The good news is, some of the same principles that reduce radiation exposure can also help your team operate more efficiently.

Here are some tips to maintain safety, even when you’re shorthanded…

A.L.A.R.A.: A Brief Reminder

A.L.A.R.A. stands for “As Low As Reasonably Achievable,” and it’s the guiding set of principles that help you reduce radiation exposure to yourself, your staff, and your patients.

This is important because ionizing radiation from x-rays can damage cells, and cumulative exposure can lead to health risks such as cancer and genetic damage to reproductive cells.

To minimize exposure, there are 3 principles to keep in mind:

• Time

• Distance

• Shielding

Decreasing exposure times, increasing the distance between your team and the x-ray source, and using PPE, all can help to decrease radiation exposure.

Tips for Radiography Safety and Efficiency

Hands-Free Restraint

Increasing the distance between your team members and the x-ray source is one of the most effective ways to decrease x-ray exposure.

Think of the inverse square law, which states that doubling your distance away from the x-ray source results in ¼ of the dose of x-ray radiation.

That’s a significant decrease!

Also, scatter radiation comes from the patient—so by not touching the patient, you’re reducing your exposure.

This can be accomplished by using:

• Chemical restraint.

• Positioning aids such as sandbags and tape.

• A combination of both.

In addition to contributing to safety, hands-free restraint also increases staffing efficiency.

Especially for large or wiggly patients, it takes fewer staff members to position the patient when hands-free restraint is used.

Patient Comfort

A patient who wiggles at the last moment can lead to a crooked radiographic image—and thus, the need to retake that view.

The more shots you take, the higher the x-ray exposure to your team members.

Keeping a dog or cat’s comfort in mind can help you get the shot you need the first time—and decrease the need for retakes.

Here’s how you can do this…

• Minimize fear and pain (for example, pain from stretching a sore leg to get the right position) by using chemical restraint. 

• Use a trough or other aid for comfort. Lying with their back on a cold, hard table can cause even the most cooperative of pets to squirm. Giving them a cozy place to settle into can really help.

• Play white noise or background music. This helps make the big buzzing and beeping sounds from the x-ray machine less startling to a dog or cat.

In addition to a better patient experience and less x-ray exposure, these methods help save your staff time by getting your views more quickly.

Getting Things Right the First Time

The fewer images you take, the less radiation exposure there will be.

In addition to the measures listed above, here are some ideas for taking the fewest views possible…

• Good planning. Be sure to know exactly which views you need ahead of time and what position the patient needs to be in for those views. Communicate these expectations clearly with your staff.

• Proper measurement. Measure the patient in the position they will be in during the shot (lying down rather than standing).

• Have a technique chart, or use appropriate settings in your digital unit. Teach team members how to make quick and accurate adjustments in settings, too.

• Use collimation. In addition to producing a higher-quality image, collimation decreases scatter radiation.

A thorough understanding of x-ray positioning and machine settings will save your staff time and headaches—in addition to minimizing radiation exposure.

Who Should Be in the X-Ray Suite?

Only the team members taking the radiographs should be near the machine. Clients shouldn’t be in the x-ray suite, and other team members should be fulfilling other duties—especially when you’re shorthanded.

Rotating the staff you have on x-ray duty can also help minimize their cumulative exposures. 

So, it’s smart to invest in training multiple team members. That way, you’ll also avoid delays if your “go-to” x-ray staff member ever needs to call out sick or otherwise miss a day.

PPE Care and Use

Even though the nature of your daily practice may have changed, it’s still important to keep up with x-ray safety measures, such as making sure your PPE is in good condition.

Experts recommend checking PPE every six months, and this includes radiographing your aprons, gloves, and thyroid shields to check for cracks. Of course, check and replace sooner if there are any notable defects.

Uncertain times may be stressful, but you and your team can continue to help the patients who need you while keeping yourselves safe.

Written by: Dr. Tammy Powell, DVM

Positioning Tips for Dental Radiographs

When it comes to evaluating a pet’s teeth, dental x-rays are the best way to see what’s happening “under the surface.” That is, under the gumline.

Dental radiographs help you obtain a full picture of tooth roots, evaluate for periodontal disease and damage, differentiate between different types of FORLs, and look for any other defects that may not be visible with your eyes alone.

Even though the value of dental radiographs (to both your patients and your practice) is hard to deny, there can be a learning curve when your team first begins to use them.

This is important, because in order for your x-ray images to be diagnostic, they need to be good quality.

Fortunately, with practice, dental x-rays become simple and routine—a process your team can quickly replicate for each patient.

Establishing a Dental X-Ray Routine

To make the dental radiograph process easy for you and your team—and as quick as possible for your patients—it’s best to establish a repeatable routine.

This means taking the same shots, in the same order, each time. 

You may need a larger number of views depending on the patient’s size and the angle of their mouth, but in general you can start in the same place each time and move through your views systematically until images of all teeth and their roots are captured.

Use your digital software to set up the views in the order you prefer. 

Once you establish a routine, it will only take a few minutes to shoot all views for a small patient. And large dogs should take a maximum of 15-20 minutes.

Positioning the Patient

Your patients will be under general anesthesia for their dental procedure, including dental x-rays.

After intubation, leave the patient in sternal recumbency, and simply place a towel under their chin to keep their maxilla parallel to the table. Then obtain your views of the maxillary teeth. 

When you finish the views of the maxilla, move the patient to dorsal recumbency, this time using a towel or other prop under their neck to keep the mandible parallel to the table as you obtain your views of the mandibular teeth.

You can use a trough or sandbags to stabilize the patient and keep them from tilting to the side, if needed.

Adjust this plan if you find that another method better suits your needs. For example, you may find that lateral recumbency works best for you for some views. 

Whatever system you choose, we recommend repeating the same steps each time and using a method that minimizes the number of times you need to move the patient.

Sensor or Film Placement

Select the right size sensor or film for your patient. For most veterinary patients, this would be either a size 2 (for small dogs and cats, or views focusing on a single tooth) or a size 4 (for large dogs, or for full-mouth/whole quadrant radiographic views).

Whether you’re using a sensor for digital x-rays, or regular dental film, placement is important to ensure you can see all of each tooth root. Remember the roots are much longer than the crowns (twice as long with canine teeth), so position your sensor accordingly. 

Finally, determine which side of the sensor or film should be positioned toward the x-ray beam. This may be indicated by a small dot or “dimple” on films. If you have a digital sensor, the cord side should face away from the tube and the cord should exit the front of the patient’s mouth.

Beam Placement

A parallel angle is used for the mandibular premolar and molar teeth. For many pets, this part of the mouth allows the sensor to be placed parallel to the teeth, and the beam to be shot straight forward (perpendicular) into the sensor.

The rest of the mouth, however, prevents this placement (the palate and mandibular symphysis get in the way). So, you’ll need to use a bisecting angle for the rest of your shots (and possibly for the rostral mandibular premolars).

A bisecting angle might seem complicated, but it’s important—choosing the correct angle prevents distortion (lengthening or shortening of the tooth root in your image).

Here is how to determine the bisecting angle:

• Position the sensor within the mouth behind the teeth you want to x-ray, as if the patient is biting on it (use gauze or other aids to hold the mouth open so there is no pressure from the teeth that could damage the sensor). 

• Estimate the angle between the tooth root and the plate.

• Divide this angle in half, and draw an imaginary line with your mind. 

• Position the x-ray beam perpendicular (at a right angle, or 90 degrees) to this line you’ve just imagined.

If the tooth root is too long on your image, raise the angle of the tube relative to the sensor. If the root is too short, lower the angle of the beam (move it more parallel toward the sensor). 

Developing a Simplified Technique

Using a simplified technique can allow you to skip the bisecting angle measurement. For example, one described technique uses just three angles for all oral views…

• 90 degrees for mandibular molars/premolars.

• 70 degrees for maxillary molars/premolars.

• 45 degrees for canines and incisors.

Since you can position these angles on your tube head without measuring (many units have predetermined angles marked by the tube head), this makes positioning much easier and faster for you and your staff.

Exceptions, Views of Specific Teeth, and Further Training

These guidelines are a good starting point for many patients. But, you may find you need to adjust your views to accommodate certain dogs and cats, depending on the shape of their mouth and tooth roots.

Cats in particular may need steeper angles than dogs to minimize interference from the zygomatic arch. And some patients will have tooth roots that curve significantly.

For all of these reasons, and for the benefit of hands-on experience, it helps to schedule a demo of your equipment, or to find an in-person training opportunity for your staff. That way, you can maximize your return on investment by using your dental radiography unit to its fullest potential.

Any time spent developing the proper technique for positioning will be well worth it, as you’ll be able to quickly take views that aid your treatment decisions and deliver value to your clients.

Disclaimer: This article is for general informational purposes only, and not intended as a guide to the medical treatment of any specific animal.

Written by: Dr. Tammy Powell, DVM

Bad Breath Can Mean Trouble

Bad breath, or halitosis, is one of those health problems that’s easy for pet parents to overlook.

Sure, it’s inconvenient. Stinky breath can certainly put a damper on a pet owner’s cuddle time or other interactions with their dog or cat.

However, many pet owners don’t realize that halitosis can mean something much worse… such as periodontal disease, or even an internal problem.

As a veterinarian, you know this very well—but it can be a challenge to communicate the dangers lying “under the surface” when it comes to bad breath.

Explaining halitosis to pet parents

The first step is figuring out where the bad breath is coming from, and explaining the potential risks to clients.

Dental problems such as periodontal disease are the most common cause of bad breath in pets. But sometimes, halitosis begins somewhere in the body other than the mouth.

Possible sources of halitosis include…

• Periodontal disease and other dental issues.

• A health condition such as kidney disease (an ammonia-like or unpleasant smell) or diabetic ketoacidosis (more of a sweet smell).

• Respiratory diseases.

• Digestive issues or dietary indiscretions.

• Objects (like branches or chicken bones) stuck somewhere in the mouth.

• Oral neoplasias.

• Certain toxins.

Based on your patient’s history and physical exam, you’ll determine the most likely cause of the bad breath, and decide if diagnostic testing is needed. 

If the patient in front of you seems otherwise healthy but has obvious terrible dental disease, you can probably assume the smell (or at least, a large portion of the smell) is coming directly from their mouth.

And if a dental procedure is indicated, you’ll likely do pre-op bloodwork, which will help to confirm the patient is otherwise healthy. 

A recap of periodontal disease

It all starts with plaque, that thin film that forms on teeth due to food and saliva. We get plaque as humans, too, but fortunately, plaque can be removed by tooth brushing.

If not brushed away, plaque hardens into calculus (tartar) within as little as 24-36 hours. Then, it accumulates more and more over time and harbors bacteria. Calculus can’t be removed by toothbrushing alone.

Soon, this calculus (and its resident bacteria) become very irritating to the gums—and they like to grow below the gum line, where it’s harder to observe the process visually. This results in gingivitis, an early stage of periodontal disease (a disease process affecting the structures that hold teeth in place) where the gums become red and inflamed and may bleed.

From here, as the periodontal disease worsens, it creates pockets in the gumline, destruction of the periodontal ligament, and even bone loss in the maxilla and mandible. In severe cases, this bone loss can cause jaw fractures.

This all leads to pain and tooth loss. And, opportunistic bacteria may enter the bloodstream via inflamed gums, traveling to and causing problems in organs such as the heart or kidneys.

Reminding clients of the dangers of periodontal disease can help them understand their pet’s bad breath is true health and quality of life problem—not just an inconvenience.

Evaluating and treating dental and periodontal disease

Your initial pre-op exam will be done while the patient is awake—ideally with the owner present so you can show them what you’re seeing.

However, awake exams don’t allow for a full oral assessment. And, dogs or cats who are painful might not let you get a good look.

So you’ll make a dental cleaning estimate based on your initial exam but explain to the client that the full assessment will be done during the procedure.

This assessment should include dental radiographs. Since much of the disease process starts below the gumline, x-rays are the only way to see the full extent of damage from periodontal disease.

Some patients will just need routine cleaning, while others may need significant dental extractions. And, you can talk to your clients about continuing dental care at home through tooth brushing and dental treats.

By providing this valuable service, you’ll be not only keeping your canine and feline patients in great health—but also increasing the human-animal bond by preventing halitosis from interfering with the quality time between a pet and their owner.

Disclaimer: This article is for general informational purposes only, and not intended as a guide to the medical treatment of any specific animal.

Written by: Dr. Tammy Powell, DVM

How and Where To Buy Used Veterinary Equipment

During the economic fallout of this unprecedented global pandemic, it’s more important than ever for businesses to stretch their dollars as far as they will go. 

Buying used equipment is a budget-friendly way to purchase high-quality machines and supplies—so you can operate and upgrade your practice the way you want to. 

More importantly, you can buy on a friendly, community-based platform that removes all headaches about negotiating, shipping, and payments—so you can securely get the equipment you need without taking time away from your busy schedule.

In case you’re not already familiar with it, we recommend you visit: usedvetequipment.com. 

This website was started because veterinarians needed a marketplace just for their industry—somewhere to easily buy and sell quality used veterinary equipment from trusted colleagues. 

Here’s what one happy buyer had to say:

“I purchased a digital x-ray system through usedvetequipment.com. The transaction was smooth. I would not have taken the chance without the third party mediator. Brad did a great job and the sellers were great to work with. I would not hesitate to use this service again.”

—Mark Robinson, DVM Montana

Here are a few advantages that usedvetequipment.com offers to you as a veterinarian buyer…

• Quality. On the site, you’ll find products from top manufacturers such as Abaxis, Shoreline, Heska, SurgiVet, Cardell, Welch Allen, Idexx, and much more.

• Choices. Whether you’re looking to invest in something as large as a full radiology unit, or something as small as a laryngoscope or warming pad, you can find it on usedvetequipment.com. 

There are far too many examples to list here, but other items recently sold include endoscopes, Dopplers, stem cell therapy equipment, surgical tools, cages and floor grates, exam lift tables, and much more.

• Easy Payment Options. You’ll be emailed an invoice for convenient online payment.

• Good for Animals and the Environment. Reusing and repurposing equipment is not only a great way for the veterinary community to share resources to improve animal care everywhere—it can also help keep materials out of landfills.

• Safety and Security. We’ve found the veterinary community to be honest in their descriptions of the equipment they are selling—and the standard buying process lets you inspect the equipment upon arrival before your payment is processed.

• Stellar Service. Just check the site, and you’ll find reviews from tons of happy buyers and sellers!

If you’re ready to get started, head over to usedvetequipment.com. 

Here are some things to keep in mind as you shop…

• Compare your options. If there’s more than one listing for the equipment you need (a common scenario), search around and make obligation-free offers. And if you’re not in a big hurry, search over time to see what else pops up.

• Ask Questions. This isn’t a big, faceless online store—instead, it’s all about community! You’re free to reach out to sellers with any questions you may have and to ask us about the details of shipping and payments. 

• Expect the Best Experience. The goal is for you to feel comfortable (and very happy!) with your purchase.

More interested in SELLING equipment rather than buying? Check out our next article, which will have detailed suggestions for how to successfully sell on usedvetequipment.com.

Until then, take a look around the site to browse what’s available, and be sure to bookmark usedvetequipment.com in case you need to come back to it to make a purchase in the future.

Wishing you good luck in your search—we’re sure you’ll find just the right equipment you need for all the services you’d like to offer at your practice. 

A community marketplace like this is the perfect place to buy and sell with colleagues as you build the practice of your dreams.

“… 10,000 times better than any eBay / Amazon kind of purchase! We will definitely look here 1st for future purchases.”

—Sandy Pamplin, Manager Pleasanton Road Animal Hospital San Antonio, Texas

“I recently purchased a film processor through Used Vet Equipment. I was very impressed with the website- pics and descriptions. I received a quick response to my questions. Brad was very professional and thorough in handling the transaction through delivery and tracking info. He made sure I was completely satisfied with the product. I would definitely do business here again! 5-star rating!”

—D Davis, Colorado

Written by: Dr. Tammy Powell, DVM