Abstract: The present invention discloses a multifunctional negative pressure drainage system switchable between various modes, including continuous negative pressure, intermittent negative pressure, rinsing, drug administration, and drug administration loop, including a medical wound dressing, a waste fluid bottle, a vacuum pump, a draining tube A, an airway A, a draining tube B, a peristaltic pump, a draining tube C, an infusion bottle, a draining tube E, a control valve A, a control valve B, and a control valve F. The medical wound dressing, the draining tube B, the peristaltic pump, the draining tube C, and the infusion bottle are connected in turn. The medical wound dressing, the draining tube A, the waste fluid bottle, the airway A, and the vacuum pump are connected in turn. The draining tube E is connected between the draining tube C and the draining tube A. The control valve A is disposed on the draining tube A.

Abstract: The present invention discloses a cross-shaped double sleeve drainage tube, including an inner draining tube, a connecting member, an external sleeve tube, an inner guiding tube, a support rack, a block member, and a pressure sensor. A left end of the inner draining tube is formed in an opening, and a right end of the inner draining tube is sealed. A tube wall at the right end of the inner draining tube is provided with an inner draining hole. The connecting member combines the inner draining tube in the tunnel of the inner guiding tube. The left and right ends of the external guiding tube are formed in an opening, respectively. The tube wall at the right end of the external guiding tube is provided with a plurality of draining grooves. The inner guiding tube is installed in the tunnel of the external guiding tube through the support rack.