Medical leg rest

Abstract

Twelve cams are coaxially arranged on a cam shaft at equal intervals, the cam shaft is rotationally installed in a supporting frame, twelve supporting blocks are installed on the upper side of the supporting frame and form a moving pair, two springs are installed between each supporting block and the supporting frame, and therefore rollers on the lower sides of the supporting blocks are tightly pressed with the corresponding cams all the time; the motor is fixedly installed at the front end of the lower side of the supporting frame and can drive the twelve supporting blocks to periodically move up and down according to a certain rule. A ball socket structure at the right end of the upper side of the supporting rod is matched with a spherical structure on the lower side of the supporting frame to 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, and the first screw can lock movement and rotation of the supporting rod. The sliding table and a guide rail on the side face of the operating bed are installed in a matched mode, the position of the sliding table can be locked through a hand wheel, 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 medical leg rest. 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 positively related to the operat...

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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