Question | Answer |
the method and needle gauge selected depend on | the vessel size, the amount of blood required, the intended use of the sample and teh technicians preference |
forceful retraction of the syringe may result in | hemolysis of red blood cells as they pass through the needle |
wiping the hair and skin with isopropyl alcohol achieves | removal of skin contaminants, causes vasodilatation, improves visualization of the vein. |
the most important aspects of any venipuncture technique aare | proper restraint of the animal and proper distention and immobilization of the vessel |
the most frequently used sites for canine blood collection are | cephalic, jugular, and lateral spahenous veins |
the most frequently used sites for feline collection are | cephalic, jugular, femoral and medial saphenous |
In sternal positioning venipuncture is usually done | in a cephalad direction |
in lateral positioning venipuncture is generally done in a | caudal direction |
cephalic venipuncture | the vein is at the top anterior of the forearm |
jugular venipuncture | the vein is in the neck |
lateral saphenous venipuncture | the vein is on the outside of the back leg |
medial saphenous or femoral venipuncture | the vein is on the inside of the leg mainly used in cats. used to collect small amounts of sample |
marginal ear venipuncture | the edge of the ear in cats. used for small sample testing ie blood smears, glucose testing. the test strip should be designed to measure a capillary and not venous blood sample |
arterial blood sample | best used to test blood gases the best way to assess pulmonary function |
blood gases measure | the partial pressure of carbon dioxide (PaCO2-ventilation) and oxygen (PaO2-oxygenation) in the blood |
the most common artery used for catheter placement is the | dorsal metatarsal artery |
advantages for using the dorsal metatarsal artery are | 1. catheter can be taped rather than sutured. 2. risk of hematoma is reduced because of the tight SC tissues and the catheter is easier to maintain and kink less |