Medical devices and methods for delivering fluid. The medical devices include one or more needles for delivering fluid. The methods may optionally include expanding an expandable member such as an inflatable member to expand an expandable scaffold outward toward a lumen wall. The devices may include one or both of one or more spine securing members or one or more needle alignment members.

A system for assisting a circulation of blood inside a body of a patient includes a pump including: a housing having an upstream portion and a downstream portion; an inducer positioned in the upstream portion of the housing, the inducer including one or more helically-wound inducer blades to rotate around a longitudinal axis of the pump; an impeller positioned downstream of the inducer in the housing, the impeller including one or more impeller blades to rotate around the longitudinal axis of the pump; and a diffuser positioned in the downstream portion of the housing, to direct blood through at least one aperture in a circumference of the housing.

A system to be used inside a dialysis unit for dilating obstructed blood vessel, comprises a catheter, a device, a remote-control box, supportive components and connection cables. A catheter comprises an elongated portion, a proximal end and a distal end, extended longitudinally. A distal end of a catheter has a convectively heating tip with a heat generating element and an inflatable balloon. A device has a radiofrequency current generator to supply and control a heating process of a heat generating element of a catheter tip. A remote-control box comprises a valve assembly, a heat activation switch and a balloon inflation switch to facilitate a treatment process.

The present disclosure provides a novel medical valve apparatus based on the three-way stopcock mechanism, but with dual inlets and side ports connected to a shared inlet and controlled by independent luer valve control mechanisms. This design enables a single operator to simultaneously inflate two separate angioplasty balloons without the need to consider pressure equalization between the balloons during bifurcated lesion procedures. Furthermore, due to the independent nature of the valve controls, the valve apparatus can equally well be used in single lesion procedures.

Balloon catheters that includes inner and outer elongate shafts, each of which is secured relative to an end of an inflatable member. The inner and outer elongate shafts are secured relative to one another at one more discrete connection locations. The balloon bonding locations are disposed radially inward relative to an outer dimension of the outer elongate shaft.

Balloon catheters that includes inner and outer elongate shafts, each of which is secured relative to an end of an inflatable member. The inner and outer elongate shafts are secured relative to one another at one more discrete connection locations. The balloon bonding locations are disposed radially inward relative to an outer dimension of the outer elongate shaft.

Balloon/infusion catheters comprise internal corewires within a single lumen structure in which the corewire can slide relative to the catheter tube within limits, and the balloon is attached to the catheter tube on one end and to the sliding corewire on the other end. The lumen provides fluid to inflate the balloon and to infuse fluid into the vessel proximal to the balloon. The infusion ports can have a polymer valve to limit infusion to lumen pressures at which the balloon is appropriately inflated. The balloon/infusion catheter can have an integral flow meter near its proximal end. Corresponding methods for use of the balloon/infusion catheter are described, such as for the delivery of hydraulic forces when used in conjunction with an aspiration catheter.

The present disclosure is directed toward a semi-compliant to non-compliant, conformable balloon useful in medical applications. Conformable balloons of the present disclosure exhibit a low straightening force when in a curved configuration and at inflation pressures greater than 4 atm. Balloons of the present disclosure are constructed of material that can compress along an inner length when the balloon is in a curved configuration. In further embodiments, balloons of the present disclosure can be constructed of material that sufficiently elongates along an outer arc when the balloon is in a curved configuration. As a result, medical balloons, in accordance with the present disclosure, when inflated in a curved configuration, exhibit kink-free configurations and do not cause a significant degree of vessel straightening.

A hub for an optical shape sensing reference includes a hub body (606) configured to receive an elongated flexible instrument (622) with a shape sensing system coupled to the flexible instrument within a path formed in the hub body. A profile (630) is formed in the hub body in the path to impart a hub template configured to distinguish a portion of the elongated flexible instrument within the hub in shape sensing data. An attachment mechanism (616) is formed on the hub body to detachably connect the hub body to a deployable instrument such that a change in a position of the hub body indicates a corresponding change in the deployable device.

A method of inducing retrograde blood flow may include extending a sheath through opposite walls of one of an artery and a vein of a subject and through a wall of the other of the artery and the vein such that a distal end of the sheath may be positioned within one of the artery and the vein. The method may include inducing retrograde blood flow in the artery and delivering the induced retrograde blood flow into the vein of the subject via the sheath.