What is the insertion angle for an indwelling needle?
Apr 15, 2023
Source: Cainiu Health
Dr. Yang Ziqi
Introduction
In general, the insertion angle of an indwelling needle may vary among individuals and procedures. For most people, with normal skin thickness, the insertion angle typically ranges from 15° to 30°. However, adjustments should be made if the skin is unusually thin or thick. If any discomfort occurs during the use of an indwelling needle, medical attention is recommended promptly.
Generally, the insertion angle of an indwelling needle may vary depending on the individual and the specific procedure. For most people, with normal skin thickness, the appropriate insertion angle ranges from 15° to 30°. However, this angle should be adjusted if the skin is unusually thin or thick. If any discomfort occurs during the use of an indwelling needle, medical advice should be sought promptly. Detailed explanations are as follows:
An indwelling needle is an intravenous catheter composed of a stainless steel stylet, a soft outer cannula, and a plastic hub. It is commonly used for intravenous infusion. After disinfecting the injection site with alcohol, the needle is inserted into the skin. Once the indwelling needle is in place, it should be secured—often with adhesive tape—to prevent movement that could lead to local hematoma or vessel puncture.
However, adjustments to the insertion angle should be made based on skin thickness. For example, when inserting the needle into thicker skin or in elderly patients, a slightly higher angle of approximately 30° is recommended. Conversely, for thinner skin or in younger patients, a lower angle of about 15° is more suitable.
If intravenous infusion is required for an extended period, using an indwelling needle is advisable as it helps reduce skin damage. Patients are encouraged to actively cooperate with healthcare providers and consult their doctor promptly regarding any concerns.
