There are two kinds of animal blood pressure measurement: invasive and noninvasive. The non-invasive method is to implant the sphygmomanometer into the blood vessel through surgery after the animal is anesthetized, and the measured value is relatively accurate, but it is not very practical in clinical application because of the need to anesthetize the animal. Among non-invasive sphygmomanometers, Doppler sphygmomanometer is widely used because of its simple use, accurate value and reasonable price. Before measuring blood pressure, animals should be comforted to get familiar with the environment before measuring blood pressure. Before making a high-pressure decision, the false positive results caused by animal clinical anxiety must be ruled out.
Second, the application of Doppler sphygmomanometer
1. Doppler sphygmomanometer can be used as the choice tool of cardiac ultrasound, and blood pressure and heart sound auscultation can be included in routine health examination items. Blood pressure represents the pressure of blood pumped by the heart on the inner wall of blood vessels. If the blood pressure measured by Doppler sphygmomanometer is too high and the heart sound auscultation is abnormal, it means that there is serious cardiovascular disease, and it is necessary to arrange cardiac ultrasound examination or regular follow-up.
2. Track the use of antihypertensive drugs
When animals have heart disease or high blood pressure, blood pressure should be measured again three days after taking the medicine to determine whether the blood pressure returns to normal or to control the drug dosage by using the blood pressure value. If the blood pressure is normal, take another blood pressure test after 3-7 days for follow-up, and take another blood pressure test after at least 3-6 months.
3. Preoperative evaluation
Preoperative blood pressure measurement of animals, if the preoperative blood pressure is low and albumin is low, it is not suitable for surgery, and if forced surgery, it is not easy to rescue intraoperative shock. During the operation, the systolic blood pressure should be kept at 80- 100 mg of body tissue to maintain adequate blood perfusion. After operation, the blood pressure of animals should be measured to avoid low blood pressure and insufficient blood supply to the heart and kidneys, which will lead to hypoxia, decreased resistance and easy infection.
4. First aid
When the animal is in shock or stops breathing, the blood flow can be measured by Doppler sphygmomanometer in the first aid, and the pulse and blood flow can be known.
Third, the measurement process of Doppler sphygmomanometer
Animals waiting for blood pressure measurement
1. cuff and placement position of sphygmomanometer
Sphygmomanometer sleeve with inflatable airbag, there are different specifications.
The length of cuff airbag of sphygmomanometer must be 60% longer than its circumference, and its width should be 40-50% of its circumference. It should not be too long or too wide. If it is too short, the airbag will bounce off after sticking, and blood pressure cannot be measured. If it is too narrow, it will cause too much pressure and can't measure blood pressure. Generally speaking, the cuff is located between the elbow joint and wrist joint to avoid bone protrusion.
Doppler sphygmomanometer probe.
The core of Doppler sphygmomanometer. The probe is placed under the cuff. The probe measures the blood flow on the artery by sending or receiving sound waves received from the blood vessel wall. By changing the frequency, the probe converts the frequency into a sound signal. The position where the probe is placed needs shaving, and ultrasonic coupling agent is needed to reduce the influence of air between the probe and the placement position. Generally, the probe can be glued with adhesive tape to prevent interference caused by moving back and forth.
The control button of Doppler sphygmomanometer can receive sound, adjust the sound volume and control the switch.
The handle and dashboard inflate the airbag, and the final blood pressure value is reflected in the value on the dashboard. After inflation, press the button to deflate the airbag.
Another Maltese, measuring blood pressure.
Dogs are agitated when measuring blood pressure, which leads to easy operation and inaccurate measurement. Animals that have not taken their blood pressure for the first time are more sensitive, so they can refuse the first data and take the test after they get used to it. In order to reduce the error, it should be measured at least five times, and the average value should be taken as the final reference value.