Leg rest for lithotomy position operation

Abstract

The invention discloses a lithotomy position operation leg rest which is characterized in that twelve cams are arranged on each of a first cam shaft and a second cam shaft 21 and mounted on two sides in a support frame, twelve support plates are mounted on each of two sides in the support frame, and rollers arranged on the support plates on two sides press the surfaces of the cams of the corresponding cam shafts; the motor can drive the first cam shaft to rotate anticlockwise and the second cam shaft to rotate clockwise at the same time through the gear meshing structure and the synchronous belt transmission structure, and then the supporting plate is made to change the supporting position regularly. A ball socket structure at the right end of the supporting rod and a spherical structure on the lower side of the supporting frame form a spherical pair, the second screw can lock spherical rotation of the supporting frame, the lower end of the supporting rod is installed in a vertical round hole of the sliding table and forms a moving pair and a rotating pair, the first screw can lock movement and rotation of the supporting rod, and therefore the height and angle of the leg placing frame are locked. The sliding table is matched with a guide rail on the side face of the operating bed, the hand wheel can lock the position of the sliding table, and therefore locking of the longitudinal position of the leg placing frame is achieved.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a leg rest for lithotomy position surgery. Background technique [0002] Lithotomy position is a method of surgical positioning, which is characterized by the patient lying on his back, moving his buttocks to the side of the bed and placing his legs on the leg rest, which can maximize the exposure of the perineum, and is mostly used for anorectal surgery and gynecological surgery; When the lithotomy position is used, the patient’s legs are required to be placed on the leg rest. The traditional leg rest will lead to complications such as pressure injury, common peroneal nerve injury, lower extremity venous thrombosis, and calf compartment syndrome. The pressure injury is a limited injury that occurs in the skin or subcutaneous tissue, which can be manifested as local tissue damage but the epidermis is intact or an open ulcer. Intraoperative pressure injury is positivel...

AI Technical Summary

Problems solved by technology

[0002] Lithotomy position is a method of surgical positioning, which is characterized by the patient lying on his back, moving his buttocks to the side of the bed and placing his legs on the leg rest, which can maximize the exposure of the perineum, and is mostly used for anorectal surgery and gynecological surgery; When the lithotomy position is used, the patient’s legs are required to be placed on the leg rest. The traditional leg rest will lead to complications such as pressure injury, common peroneal nerve injury, lower extremity venous thrombosis, and calf compartment syndrome. The pressure injury is a limited injury that occurs in the skin or subcutaneous tissue, which can be manifested as local tissue damage but the epidermis is intact or an open ulcer. Intraoperative pressure injury is positively related to the operation time, and the patient maintains a Irreversible damage may occur if the surgical position lasts for more than 2 hours, and pressure injury will inevitably occur if the surgical position lasts for 4 hours; the lithotomy position requires the patient’s lower limbs to be placed on the leg rest in an abducted and suspended shape, and the static pressure of the fibular head on the Legrest, the common peroneal nerve passes through the head of the fibula and its position is superficial. Under anesthesia, the patient's muscle tone is reduced and sensory disturbance, resulting in compression injury of the common peroneal nerve; the common peroneal nerve injury manifests as the outer skin of the lower leg of the patient after surgery Loss of sensation, the ankle joint cannot dorsiflex and varus, and walks in a drooping foot posture; the popliteal artery and popliteal vein located in the popliteal fossa are mainly used to maintain blood circulation in the calf, while the popliteal fossa has less muscle and fat tissue, and the legs are long When static pressure is placed on the leg rest for a long time, the popliteal artery and popliteal vein will be oppressed and blocked for a long time, causing blood circulation disturbance in the calf, resulting in an increase in local intravascular pressure, resulting in venous thrombosis of the lower extremity, and may even occur after the operation time exceeds 4 hours. Compartment syndrome of the lower leg, with serious consequences eventually leading to muscle necrosis and loss of function in the lower leg

[0003] The existing leg rests for lithotomy positions are all equipped with soft silica gel and other materials. Although the supporting area can be increased to a certain extent, complications will also occur when the static pressure cushion is used for a long time; It is of great significance to avoid the leg rest under static pressure for a long time at the same position of the legs

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