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Needles designed for insufflation or withdrawal of gases to and/or from the peritoneal cavity. These devices typically consist of very sharp, long (e.g., 5 to 6 in, 12 to 15 cm), thin needles attached to an appropriate handle. Pneumoperitoneal needles are used either for peritoneal insufflation in laparoscopic procedures and/or as an aid to radiologic procedures; they are also used to withdraw gases that occur spontaneously due to abnormal processes (e.g., subphrenic abscess). Some peritoneal needles are inserted using a spring-loaded mechanism.
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