A peristaltic pump includes a first motor shaft, a second motor shaft, a first pump head, a second pump head, and a motor. The first pump head is operably coupled to the first motor shaft such that the first pump head is rotated in response to rotation of the first motor shaft. The second pump head is operably coupled to the second motor shaft such that the second pump head is rotated in response to rotation of the second motor shaft. The motor is configured to rotate the first and second motor shafts. The pump head has a first mode in which the first pump head is rotated and the second pump head is idle and a second mode in which the first pump head is idle and the second pump head is rotated.

A method of reducing postpartum bleeding includes positioning a device comprising a vacuum element within the uterus; sealing the uterus; activating vacuum in the uterus with the vacuum element of the device while the uterus is sealed; and collapsing the uterus with the vacuum to reduce postpartum bleeding.

A postpartum balloon system includes a flexible elongate catheter, an inflatable balloon, and a suction member attached to the distal end of the catheter. The system can be delivered into the uterus, where suction is applied to the suction member to anchor the balloon to the internal wall of the uterus. The catheter may include drainage ports both proximal and distal from the balloon. The system may include a stiffening stylet inserted into the drainage lumen of the catheter for aiding in delivery of the balloon. The stiffening stylet can be removed after placement of the balloon. The stiffening stylet can include side passageways that match the drainage ports and a lumen that allows for drainage through the stylet, as well as for administering drugs or other compounds through the drainage ports while the balloon is in place.

A sterile liquid transfer assembly for use with a catheter assembly. The sterile liquid transfer assembly includes a protective element and a carrier element. The protective element includes a pliable, hollow protective valve member having a pivot cutaway portion. A tubular member of the protective element depends from a surface of the hollow protective valve member. The protective valve member is configured to define a stop for limiting the insertion of the tubular member in a canal of a patient.

A fluid management system for use in a tissue resection procedure includes a controller. An inflow pump is operated by the controller and configured to provide fluid inflow through a flow path to a site in patient's body. An outflow pump is operated by the controller and configured to provide fluid outflow through a flow path from the site in patient's body. A motor driven resecting device may be provided for resecting tissue at the site. The controller is configured to actuate an inflow pump and an outflow pump in response to various signals and various algorithms are provided to provide malfunction warnings and assure safe operation.

A hysteroscopic fluid management system includes a saline source with an electrolyte concentration, at least one pressure mechanism for circulating saline to and from a targeted site and through a filter having filter characteristics back to the source, and a controller. The controller provides a saline inflow in a first flow path to the site and a saline outflow in a second flow path from the site through the filter and back to the source at a controlled flow rate. A diagnostic or therapeutic procedure is performed at the site in the presence of the saline. The filter characteristics and the controlled flow rate are selected to (1) cause substantially no change in the electrolyte concentration in the saline, (2) to prevent hemolysis of greater than 5% of filtered red blood cells exposed to the saline, and/or (3) to minimize effect on prothrombin time of plasma exposed to the filter.

A method of transarterial embolization agent delivery at a low pressure is provided. The method comprises advancing a delivery device with an occlusion structure in a retracted non-occlusive configuration through a supply artery to a vascular position in the supply artery that is in the vicinity of a target anatomical structure, the target structure having terminal capillary beds, expanding the occlusion structure from the retracted non-occlusive configuration to an expanded occlusive configuration, lowering a mean arterial pressure in a vascular space distal to the expanded occlusion structure, redirecting fluid flow from the collateral vessels toward the lowered pressure vascular space and into the target anatomical structure, injecting an embolization agent through the delivery device and into the lowered pressure vascular space, and delivering the embolization agent from the lowered pressure vascular space into the target anatomical structure. Other catheter assemblies and methods of use are also disclosed.

A medical device including an introducer; a first section configured to connect to a supply of therapeutic fluid; and a second section configured to connect to a supply of therapeutic elements. The therapeutic elements are drawn into the introducer by way of suction created by a flow of the therapeutic fluid through the introducer. The therapeutic elements are drawn into the introducer by way of suction created by a flow of the therapeutic fluid through the introducer.

Everting balloon systems and methods for using the same with an alignment element for stability and anti-rotation of the everting balloon are disclosed herein. The systems can be configured to access and deliver instruments, media, or other catheters into bodily lumens and cavities. The alignment element can eliminate the potential for the everting membrane to become twisted or rotated which could impact access or the ability of the system to deliver materials. A compliance member can facilitate internal pressurization of the everting catheter system. An everting catheter system can be configured for use with transvaginal ultrasound and a lower profile speculum is described.

A method for operating a fluid management system includes automatically detecting an unstable condition in the system, which may include detecting a large change in the supply fluid amount (indicative of a bag change), detecting a large change in the waste fluid amount (indicative of a bag change), or detecting a large difference between the amount of fluid dispensed as measured by the weight data and the amount of fluid dispensed as measured by the flow data (indicative of a blockage in the supply tubing). The method further includes adjusting the operating mode of the system during the unstable condition, which may include switching to using flow data rather than weight data to track the fluid deficit during a supply bag exchange, halting operation of an outflow pump during a waste container exchange, and/or halting operation of the system during a blockage in the supply tubing.