A flow blocking catheter including an inner tube, an outer tube and a flow blocking member is provided. The flow blocking member has one end attached to an outer circumference of the inner tube and the other end attached to a distal end of the outer tube. The flow blocking member is configured to expand as the outer tube moves toward a distal end of the inner tube and to collapse as the outer tube moves away from the distal end of the inner tube. In this way, expansion of the flow blocking member is able to be controlled simply by pushing/retracting the outer or inner tube to offer a fast shifting between different configurations. The flow blocking member is able to occlude blood flow with a controllably expansion to lower stimulation to the wall of the blood vessel and avoid the easy bursting of the balloon.

This patent document discloses perfusion catheters and related methods for treating complications related to CTO interventions or dilating a vessel occlusion while maintaining a passage through the treated vessel segment. A perfusion catheter can include an inflatable balloon coiled in a helical manner around a central axis into a series of windings. An inner surface of the series of windings, when inflated, can define a passage through the inflatable balloon. A catheter can also include an elongate shaft extending from a proximal portion to a distal portion, having an inner surface that defines a lumen for providing inflation fluid to, or withdrawing inflation fluid from, a distal end of the inflatable balloon. A catheter can further include a guidewire support tube including a lumen, separate from the lumen from the elongate shaft and the passage through the inflatable balloon, for receiving a guidewire.

The present disclosure relates generally to stents and methods for managing passage of material through a body lumen. In some embodiments, a medical stent may include a stent body defined by a hollow tubular elongate structure extending along a central axis, the stent body including a first portion and a second portion. The medical stent may further include a control region between the first and second portions, wherein in a first configuration the hollow tubular elongate structure of the control region is in a closed, twisted configuration, and wherein in a second configuration the hollow tubular elongate structure of the control region is in an open, expanded configuration.

A flow blocking catheter including an inner tube, an outer tube and a flow blocking member is provided. The outer tube is sleeved on an exterior of the inner tube and at least one end of the flow blocking member is coupled to the inner or outer tube. The ratio of the inner diameter of the inner tube to the outer diameter of the outer tube is equal to or greater than 0.7. With this arrangement, the inner diameter of the flow blocking catheter is able to be increased at a given outer diameter thereof, which makes it suitable for the treatment of large-size blood clots or passage of instruments and broadens its application range as well as improving effect of vascular treatments.

A medical device for supporting a patient's cervix, such as in the event of an insufficient cervix or uterine prolapse. The device includes a main body configured for placement in a vagina, a proximal opening at an upper portion of the body, and a distal opening at a lower portion of the body. A portion of the body engages and anchors the device along the vaginal wall proximate the cervical opening. An expandable cuff at the proximal opening is expandable to circumscribe the exterior of the cervix. The cuff is expandable inward toward the cervix, or downward away from the uterus, or both inward and downward. The cuff may include multiple features, such as a recessed portion and an enlargeable portion arranged adjacent one another, in which the recessed portion may permit blood flow to lower cervical tissue.

Various devices, systems, and methods that can be used in the treatment of obesity and related illnesses are disclosed. In some instances, the cecum of an obese patient is distended to a pathophysiological size for a therapeutically effective period. The distention may be achieved by introduction of an object that is of foreign origin relative to the body of the patient into the cecum of the patient. In some instances, the distention is achieved by a medical device that transitions from an undeployed state, in which the medical device is introduced into the cecum of the patient, to an expanded state in which the medical device distends the cecum by an amount sufficient to trigger a colo-gastric brake in the patient.

A method of providing retrograde perfusion of a patient's brain includes occluding a jugular vein of a subject at a jugular occlusion location, and passively shunting arterial blood from an artery of the subject to a location in the jugular vein distal to the jugular occlusion location.

Temporary vascular occlusion devices and methods for use thereof are described which provide temporary vascular occlusion while maintaining distal perfusion. The temporary vascular occlusion device may include a multiple layer scaffold covering having proximal and distal attachment zones separated by an unattached scaffold covering zone where the scaffold covering is adjacent to but not attached directly to the scaffold frame.

An endovascular device, including an elongated flexible sheath defining a lumen with an inner opening sized for enabling selective advancement of an endovascular instrument therethrough, the sheath having at least a first region and a second region; an electrode within the first region of the sheath; and a constrictor associated with the first region of the sheath, the constrictor being configured, while at least the first region and the second region of the sheath are positioned within a body and in response to an input received from outside the body, to reversibly narrow the lumen of the sheath in an area adjacent the electrode to thereby bring the electrode into contact with an adjacent portion of the endovascular instrument.

The present subject matter provides a system for temporarily stopping blood flow through a blood vessel, the system including: at least one magnetically attractive element configured to be introduced into an internal part of a body of a patient, and temporarily placed near a first blood vessel that supplies blood to at least one second blood vessel; and at least one magnetic field generator configured to be placed outside a body of the patient, and generate a magnetic field that attracts the at least one magnetically attractive element in a manner that the at least one magnetically attractive element presses the first blood vessel, thereby stopping flow of blood through the first blood vessel toward the second blood vessel. Additional embodiments of the system, of a kit comprising components of the same, and a method for temporarily stopping blood flow through a blood vessel, are disclosed herein as well.