The working principle of pneumoperitoneum needle

Pneumoperitoneum needle with spring protection, piercing the abdominal wall, needle core encounter resistance to retract its sheath, needle sheath tip can be through the abdominal wall, when the needle sheath prick peritoneal into the abdominal cavity, abdominal cavity filled with carbon dioxide gas, resistance to disappear, pop up under the action of a spring needle core needle sheath, makes pneumoperitoneum acus blunt, can avoid stabbed intra-abdominal viscera. However, it should be noted that when there is adhesion in the abdominal cavity, pneumoperitoneum needle will lose its protective effect

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