Po2 istat low6/18/2023 ![]() Metabolic Acidosis Each 1 mEq/L decrease in HCO3 will decrease PCO2 by 0.7 mmHg The following guidelines have been adapted from the references and serve as the recommendation for interpretation from the American College of Veterinary Emergency and Critical Care.ĭisturbance Clinical Guidelines for Compensation The first area in which blood gases are useful are in the assessment of acid-base balance. (due to differences in oxygen extraction).Īrterial samples will "gush" from the catheter! In healthy pets, there is little variation from samples collected from various venous sites, but in patients with cardiovascular compromise the differences can be outstanding (eg. Samples may also be collected from indwelling arterial or venous catheters. Arterial samples are typically collected from the dorsal pedal artery or the femoral artery. Additionally, patient care is often optimized and there appears to be improved job satisfaction!īlood gas samples can be either from a central vein (or rarely the pulmonary artery) or a peripheral vein. Most practice managers and clinicians rapidly determine that despite the initial purchase cost, the benefits of better patient care and improved revenue are quickly realized. This is much less likely to be done if a machine is not available in-house. However, practically the only way an individual practitioner (or hospital)will be able to gain comfort in interpretation of blood gases is through frequent analysis of samples from a variety of patients. Other alternatives may include local human hospital or regional veterinary laboratories. Larger veterinary hospitals often used the Nova Biomedical Analyzer ( Nova- Waltham, MA). Disposable cartridges make each test relatively economical and the turn-around time is excellent. These devices (and other similar products) are able to measure blood gas values and other chemistries on small volumes of blood. ![]() The ISTAT (Heska-Fort Collins CO) model has been widely used and is generally considered accurate and user-friendly the IRMA (ITC, Edison, NJ) is also popular. Historically, blood gas analysis has only been available at large referral or university hospitals, but in the last decade a variety of portable point-of care (POC) machines have become affordable and available in practices. In fact, gas concentrations can be evaluated in any fluid that is run through a blood gas analyzer. Blood gases can be measured on venous or arterial blood. Blood gas analysis helps the clinician to better care for the individual patient through careful titration of fluids and supplemental oxygen AND imparts a better knowledge of underlying pathophysiology accompanying various diseases. Knowledge of normal values and what they indicate can help improve patient care and understanding of the pathophysiological changes accompanying critical illness.īlood gas analysis is a specialized method of evaluating the acid base and oxygenation indices in the blood stream. Blood gas, electrolyte and lactate analysis are very useful in management of the ill or injured dog or cat.
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