Analgesia
For the vast majority of biopsy procedures local anaesthetic is administered following localization of the biopsy site on ultrasound. Either 1% or 2% lidocaine (lignocaine) is commonly used; the volume will depend upon patient build, depth of lesion and patient anxiety. Normally a short period of time, commonly 4–5 min, is allowed to pass so that the anaesthetic can work, after which a small scalpel incision is made in the skin to facilitate the biopsy needle’s introduction, with little or no discomfort to the patient.
In cases of, for example, simple aspiration with a 22-gauge needle or smaller, local anaesthetic is normally unnecessary. Patients who are particularly apprehensive may require preprocedure medication with a edative such as diazepam or similar anxiolytic agent; however this is not common. Very occasionally ntravenous analgesia and/or sedation may be required during the procedure; it is often a good idea to have an intravenous cannula in situ prior to biopsy. The use of a general anaesthetic for children is common practice, to enable the procedure to be carried out quickly and accurately while the child remains still.
In cases of, for example, simple aspiration with a 22-gauge needle or smaller, local anaesthetic is normally unnecessary. Patients who are particularly apprehensive may require preprocedure medication with a edative such as diazepam or similar anxiolytic agent; however this is not common. Very occasionally ntravenous analgesia and/or sedation may be required during the procedure; it is often a good idea to have an intravenous cannula in situ prior to biopsy. The use of a general anaesthetic for children is common practice, to enable the procedure to be carried out quickly and accurately while the child remains still.
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