An elastic percutaneous elastic introducer sheath is disclosed which can locally expand and reduce to accommodate a transcatheter medical device. The elastic introducer sheath includes a non-circumferentially continuous elastic frame, a liner, and a jacket.

The present disclosure relates generally to the field of medical devices and methods to assist in the introduction of an instrument into a patient, and more particularly to medical devices for measuring and/or monitoring forces applied during introduction of an access sheath through a body lumen.

An expandable introducer sheath with an interlock dilator. The present technology provides an expandable sheath with a step feature inside its distal opening, and a dilator with an interlock that includes a catch surface configured to engage with the step feature and resist further relative movement so that the body of the dilator is prevented from exiting the distal end of the expandable sheath. This interlocking engagement may allow the dilator to be used to extend and maintain tension on the expandable sheath during insertion into a patient, and then to be retracted from the expandable sheath by pulling the dilator in the opposite direction. The present technology also provides a dilator hub with a spring mechanism configured to achieve and maintain a desired tension on the expandable sheath and to prevent overextension of the expandable sheath when the dilator is being inserted into the expandable sheath.

A persistent perfusion sheath assembly can be used for the passage of an intravascular medical device while maintain a flow passage in the vessel. The sheath assembly passes through an arteriotomy and can include a first lumen configured for the passage of a medical device, a second lumen configured to allow a flow of fluid from a location in the blood vessel upstream of the arteriotomy to a location downstream of the arteriotomy. The sheath assembly can further include a stylet, a sleeve or an additional sheath configured to selectively open and close the flow of blood between upstream and downstream of the arteriotomy. The sheath assembly can further include a closure device distal of the arteriotomy, the closure device configured to control blood flow through the arteriotomy.

A deployment device for lining a vessel having a housing having a proximal end and a distal end opposite the proximal end, the housing defining a guidewire channel, a tube elongated along a longitudinal axis, the tube having a proximal end and a distal end spaced from the proximal end of the tube along the longitudinal axis, a sheath assembly having a hub removably coupled to the distal end of the housing, and a mesh removably coupled to the tube and positioned along the tube. The tube and the sheath assembly are configured to move along the guidewire and into the vessel through a puncture and release the mesh inside the vessel when at least one of the tube and the mesh is actuated. The device is used as a method of mitigating potential injury or harm to the integrity of the patient’s vessel lining.

A catheter delivery system is disclosed. The system includes a sheath having a bend disposed proximal to a distal end, a pigtail dilator having a loop portion in the shape of a pigtail disposed proximal to a distal end, and a straight dilator. A diameter of the loop portion is smaller than a diameter of an aortic valve and larger than a cusp of the aortic valve. The sheath and pigtail dilator are percutaneously inserted together into a blood vessel without an exchange procedure and advanced together into the left ventricle of a heart through the aortic valve without an exchange procedure.

A cannulator (100) can include a compound needle (104) and a compound cannula (102). The compound needle can include a needle (110), a dilator (108), and a needle hub (106). The dilator can be disposed over the needle with at least a tip of the needle extending beyond a distal end of the dilator. The needle hub can be around a proximal-end portion of the dilator. The compound cannula can include a cannula (140) and a cannula hub (142) around a proximal- end portion of the cannula. The cannulator can have a mated state of the compound needle and the compound cannula for at least cannulation with the cannulator. The mated state of the cannulator can include the dilator disposed in the cannula with a proximal-end portion of the cannula hub coupled to a distal-end portion of the needle hub.

A balloon catheter system includes a tube and a dilator detachable from the tube after the tube is inserted into a cavity in the patient. The cavity may be filled with gas or liquid to expand the viscera surrounding the cavity and the guidewire may be inserted using a trochar, for example. The tube includes one or more lumen to expandable balloons that are inflatable by fluid inserted through the lumen and into the balloon or balloons, which are formed by elastic film sealed on opposite ends to the external diameter of the tube. The dilator is held in place during insertion, such as by a stainless steel shaft and a sheath portion of the dilator extending over the end of the tube being inserted into the cavity. A portion of the sheath may extend over and protect the balloon. A retractor net may be used to capture and remove the dilator or the dilator may be designed as a bioabsorbable or digestible material or of a material that passes safely through the digestive tract of a patient.

A releasable coupling mechanism for coupling a delivery catheter and a dilator. The delivery catheter comprising a delivery catheter hub at the proximal end and the dilator comprising a dilator hub at the proximal end. The proximal end of the delivery catheter hub comprises a coupling member for releasably receiving a raised portion which is positioned at a distal end of the dilator hub. The coupling member has a pair of engagement members positioned on opposing sides of the coupling member and configured to releasably engage the raised portion. The delivery catheter hub further comprising at least one indicia on the housing. The indicia indicate an orientation of the delivery catheter hub such that the dilator hub disengages from the coupling member by simultaneously deflecting the pair of engagement members.

Vascular access catheter comprising elongated tubular catheter body enclosing a lumen. Catheter body includes catheter tip ending with a catheter distal end and comprising a distal edge at the catheter distal end surrounding an opening opened to the lumen. he distal edge includes a front edge portion spanning a top portion of the opening and an inclined edge portion spanning a bottom portion of the opening and inclining proximally away from the front edge portion, relative to a longitudinal axis of the catheter body. The vascular access catheter can be provided in a vascular access kit further comprising access needle with hollow needle body and beveled tip ending with sharp needle edge.