EKG Options for Use in the
Urban Search & Rescue Canine
Lori E. Gordon, DVM
The need for an electrocardiogram of a search canine may arise during a deployment. Situations may include auscultation of irregular beats, dropped femoral pulses, toxin ingestion, severe dehydration, hyperthermia, hypothermia, gastric dilatation-volvulus, respiratory arrest, and cardiac arrest.
The EKG units recommended in the FEMA cache list (Life-Pak 12) as well as other units, and automated external defibrillators (AEDs) are adaptable for use in the canines with little to no effort.
Presented here are two options for acquiring an EKG tracing from canines, as well as a veterinary EKG unit that was purchased with monies from a fund-raiser for the MA TF-1 search canines.
MA TF-1 Search and Rescue Canine UBER is not so sure about this!
After connecting the leads to the electrodes, the electrodes are placed onto the least-haired areas of the canine:
- Left and right axillae
- Left and right inguinal
The color coding is the same as for humans. The veterinary saying goes:
- Green and white is always right.
- Read newspapers up front.
- Christmas comes at end of the year.
Several medics commented on the negative T waves. In the canine, the T wave (repolarization of the ventricles) may be positive, negative, notched, or biphasic.
Alternatively, the human electrode lead connectors may be placed on the paw pads.
Sammy seems pretty content with the arrangement, and a diagnostic tracing was obtained
The second option we used was an adaptation of the connection system. The modifications below have been made for enough clips to have 4 for each medical pack
The clips are attached at the posterior cubital joints (elbows) and anterior stifle (knee) or posterior tarsal (ankle) joints. These locations have thickened skin so the canine will be less sensitive to the pinch of the alligator clips. If too harsh, the clips can be fatigued to a looser set point, or the serrated jaws filed down.
Alcohol is commonly used as a conduction medium between the leads and the skin.
Conduction paste or gel may also be used.
A fund-raising event conducted by our local Beverly Rotary allowed us to purchase the Vet BiologTM II. The following features made this a usable tool for a deployment:
Light-weight – Weighs 270 grams (9.6 ounces)
Battery-operated – Takes 2 AA 1.5V alkaline cells
ECG may be acquired by:
- Single lead cable using clips
- Thoracic placement using stainless steel disc electrode ‘feet’ on back
ECG may be stored in memory and reviewed as many times as needed.
Stores in the following temperatures – (-20o) -> 70oC (-4o ->158oF)
Operates and stores in the following humidity – 5% – 85%