Provided is a medical aspirator including a hollow cylinder housing having a space therein, a piston slidable inside the cylinder housing in a longitudinal direction, and an elastic member having one end connected to the piston and the other end fixed to the cylinder housing, and allowing the piston to move in the longitudinal direction with a constant force, in which after the medical aspirator is installed in a surgical site, a constant suction pressure is maintained, so that side effects and accidents such as organ adhesion and tissue damage in a surgical site, resulting from an excessive pressure, are reduced, and body fluid in the surgical site is effectively discharged, so that the medical aspirator may contribute to shortening of a recovery period of a patient. Further, the present disclosure relates to a medical aspirator including an upper housing constituting an upper body, a lower housing constituting a lower body, a sealing film coupled along outer surfaces of the upper housing and the lower housing and having a space formed in the sealing film, and a screw thread connector connecting the upper housing and the lower housing and having a screw thread, in which after the medical aspirator is installed in a surgical site, a constant suction pressure is maintained, so that side effects and accidents such as organ adhesion and tissue damage in a surgical site, resulting from an excessive pressure, are reduced, and body fluid in the surgical site is effectively discharged, so that the medical aspirator may contribute to shortening of a recovery period of a patient.

The present invention provides devices and methods for removal clots and other obstructive tissue and materials from humans located inside or outside of the patient's endovascular system using aspiration alone, and in combination with rotational maceration and aspiration.

A dialysis machine (e.g., a peritoneal dialysis (PD) machine) can include a control unit configured to monitor an amount of fluid withdrawn from a heater bag line during a PD treatment. A processor in the control unit is configured to operate a first pump to draw fluid into a first pump chamber and measure a first fluid volume in the first pump chamber. The processor is further configured to operate the first pump and a second pump to transfer fluid from the first pump chamber to a second pump chamber, measure a second fluid volume in the second pump chamber, and determine a measured fluid volume for a single pump cycle based on the first fluid volume and the second fluid volume. The first fluid volume is correlated to the second fluid volume and, therefore, the multiple independent measurements increase an accuracy of the fluid volume measurement.

An apparatus for cleansing wounds, in which wound exudate is removed from a wound bed and selectively cleansed and returned to the wound. The cleansing means removes materials deleterious to wound healing, and the cleansed fluid, still containing materials that are beneficial in promoting wound healing, is returned to the wound bed. The associated wound dressing and cleansing means are conformable to the wound, and may have irrigant fluid circulated from a reservoir by a device for moving fluid through a flow path which passes through the dressing and a means for fluid cleansing and back to the dressing.

A reduced pressure treatment apparatus includes a charging chamber storing a first pressure less than an ambient pressure and a regulated chamber storing a second pressure less than the ambient pressure. The first pressure is less than the second pressure. A conduit provides fluid communication between the regulated chamber and the charging chamber. A regulator member is operably associated with the conduit to prevent fluid communication through the conduit when the second pressure is less than or equal to a desired therapy pressure and to allow fluid communication through the conduit when the second pressure exceeds the desired therapy pressure.

A method and apparatus for injecting a saline solution into an open cavity of a patient's body, and, alternatively, vacuuming fluids from the open cavity during laparoscopic surgery that provides constant feed and amplified pressure to provide a steady fluid output, in a disposable, single use handheld surgical device.

A biological fluids concentration device, including a tube-in-tube assembly, is disclosed. The tube-in-tube assembly receives biologic fluids and may then be placed in the bucket of a centrifuge and spun to separate out the components of the biological fluid by their various densities. For example, whole blood may be centrifuged in the tube-in-tube assembly for separating into plasma, red blood cell component, and a buffy coat. A piston slideably and sealingly engages an inner tube of the tube-in-tube assembly, the inner tube fitting within an outer tube. A lid is designed to engage the top of the outer tube, which lid has an opening therein for receipt of a plunger. The plunger is adapted to move up and down with respect to the lid and the tubes, so as to sealingly, in a down position, and unsealingly, in an open position, engage the top of the inner tube of the tube-in-tube assembly.

A portable pump is provided for negative pressure wound therapy for drawing a vacuum from a wound site via a tube. The pump includes an inlet configured to attach the tube from the wound site; a canister in fluid communication with the inlet for collecting fluids drained from the wound site; and a manually-actuated pump mechanism for creating the vacuum. The pump mechanism includes a vacuum chamber in fluid communication with the canister; a piston disposed in the vacuum chamber; and a pump handle coupled to the piston to move the piston in the vacuum chamber between first and second positions to create the vacuum. The pump handle moving between a retracted position and an extended position. The piston is in the first position when said pump handle is in the retracted position and is in the second position when said pump handle is in the extended position.

A surgical apparatus of the present disclosure includes a wound retractor having a specimen bag attached thereto. Kits of the present disclosure include the surgical apparatus and a vacuum tube. In embodiments, the vacuum tube may be introduced into a lumen of the wound retractor. A vacuum source is attached to a proximal end portion of the vacuum tube to draw a vacuum through the vacuum tube, which in turn draws a tissue specimen into the lumen of the vacuum tube through an opening in the distal end portion of the vacuum tube. The vacuum tube, possessing the tissue specimen therein, may then be removed from the wound retractor. Methods for using the surgical apparatus and/or kits of the present disclosure are also provided.

A disclosed ophthalmological surgical set includes a contact lens, a cross-linking substance, and a device configured to generate negative pressure. The contact lens has a deformation side that is configured to face the cornea of an eye when the contact lens is placed on the eye. The deformation side of the contact lens has a shape that is a negative of a substantially emmetropic corneal shape. The cross-linking substance is applied to the cornea before placement of the contact lens on the eye. The contact lens includes a coupling device configured to generate a negative pressure between the contact lens and the eye on which the contact lens is placed such that the cornea can be suctioned, via the negative pressure, onto the deformation side of the contact lens thereby deforming the cornea into the substantially emmetropic corneal shape.