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Do not choose inadvertently "dislodgeable" veins (e.g. dorsum of hand or vicinity of joints) if an alternative vein is available. The digits, hands, and wrists should be avoided as intravenous sites for vesicant administration because of the close network of tendons and nerves that would be destroyed if an extravasation occurred.
The most common form of venous access is a peripheral venous cannula which is generally inserted into veins of the hands, forearms, and occasionally feet. [1] Healthcare providers may use a number of different techniques in order to improve the chances of successful access.
The median cubital vein is routinely used for phlebotomy and venipuncture (taking blood), and as a site for an intravenous cannula. [6] This is due to its particularly wide lumen, and its tendency to remain stationary upon needle insertion. [6] It becomes prominent when pressure is applied upstream, which makes needle insertion easier. [5]
The insertion of a plastic cannula and withdrawal of the needle was introduced as a technique in 1945. [11] The first disposable version to be marketed was the Angiocath , first sold in 1964. In the 1970s and 1980s, the use of plastic cannulas became routine, and their insertion was more frequently delegated to nursing staff.
Intravenous therapy (abbreviated as IV therapy) is a medical technique that administers fluids, medications and nutrients directly into a person's vein.The intravenous route of administration is commonly used for rehydration or to provide nutrients for those who cannot, or will not—due to reduced mental states or otherwise—consume food or water by mouth.
In the modified Allen test, one hand is examined at a time: [2] The patient is asked to clench their fist for about 30 seconds. Pressure is applied over the ulnar and the radial arteries so as to occlude both of them. Still elevated, the hand is then opened. It should appear blanched (pallor may be observed at the finger nails).
A cannula (/ ˈ k æ nj ʊ l ə / ⓘ; Latin meaning 'little reed'; pl.: cannulae or cannulas) [1] is a tube that can be inserted into the body, often for the delivery or removal of fluid or for the gathering of samples.
The butterfly's precise placement facilitates venipuncture of thin, "rolling", fragile, or otherwise poorly accessible veins. The butterfly's shallow-angle insertion design facilitates venipuncture of very superficial veins, e.g. hand, wrist, or scalp veins (hence name "scalp vein" set).
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