Special chair for pleuroperitoneal cavity sitting position puncture

The utility model discloses a special chair for pleuroperitoneal cavity sitting position puncture, which comprises a chair seat plate and supporting columns, inner chair legs are arranged on two sides of the bottom of the chair seat plate, threaded holes are arranged on the surfaces of the inner chair legs, outer chair legs are fixed outside the inner chair legs through first bolts, the supporting columns are arranged on two sides of the rear end of the top of the chair seat plate, and the supporting columns are arranged on the two sides of the rear end of the top of the chair seat plate. Mounting sleeves are fixed to the outer portions of the supporting columns through second bolts, an adjusting assembly is connected between the two mounting sleeves and comprises a connecting plate, a first forward and reverse rotation motor, a left gear, a left rack, a guide strip, a right gear, a second forward and reverse rotation motor, a right rack and a chair back, and the first forward and reverse rotation motor is ar