A hemostasis valve, a catheter sheath, and a method for sealing an interventional instrument (9), the hemostasis valve comprising a housing (1,100) and a sealing film (2,130) which is installed within the housing (1,100) and which is a tubular structure; an inner cavity (21) of the tubular structure serves as an instrument channel (11,131) and penetrates the housing (1,100); driving chambers (12,150) which are located on the periphery of the sealing film (2,130) and which are used for being filled with a fluid are provided within the housing (1,100); the hemostasis valve further comprises an energy storage mechanism (3) that can link with the fluid; the energy storage mechanism (3) correspondingly stores or releases energy when the state of the sealing film (2,130) changes; and the sealing film (2,130) is driven to seal the instrument channel (11,131) during energy release. By means of the design of the energy storage mechanism (3), deformation energy of the sealing film (2,130) is stored, thereby achieving good compatibility and a good sealing effect when different instruments pass through; in addition, by means of the configuration of parameters of the sealing film (2,130), the configuration of parameters of an energy storage structure, and the cooperation between the two, the advantages of good drawing operation feeling and small operating force changes of an instrument are achieved, and a structural basis is provided for other functions.

A method of performing a medical procedure in a cerebral vessel of a patient including advancing a first catheter system towards an embolus within a cerebral blood vessel and a second catheter system towards the embolus through the first catheter, applying aspiration pressure through the lumen of the second catheter; anchoring a distal end of the second catheter onto the embolus via the aspiration pressure; applying a proximally-directed force on the second catheter; and advancing the first catheter over the second catheter towards the embolus while the distal end of the second catheter remains anchored onto the embolus; and automatically applying aspiration pressure within the first catheter upon the second catheter portion entering into the first catheter.

A balloon guide catheter system including a balloon guide catheter having a catheter shaft that includes: (i) a main lumen; (ii) an inflation lumen; and (iii) an exhaust lumen. The terminating distal end of the inflation lumen and the terminating distal end of the exhaust lumen being in localized fluid communication with one another underneath the balloon while in a non-inflated state. A balloon is disposed about a distal region of an outer surface of the catheter shaft. The exhaust lumen is configured to purge the residual air in a proximal direction and out from a proximal region of the balloon guide catheter.

A catheter assembly configured for use with a male luer is provided herein. The catheter assembly can comprise a catheter hub having an interior chamber and a valve located in the interior chamber. The valve can comprise a distal portion, a proximal portion, and a sidewall extending therebetween to define a valve interior. The valve can include a barrier layer having a concave shape that extends in the valve interior from the sidewall at the distal portion. The barrier layer can have at least one slit extending therethrough that is in a normally closed configuration to prevent a fluid from passing through the barrier layer. The catheter assembly can further comprise a sealing ring located circumferentially at a distal end of the valve distally to the barrier layer. The sealing ring can form a seal between the valve and the interior chamber at the distal end.

The present invention relates to a multiple-use intravenous (IV) catheter assembly septum and septum actuator. In particular, the present invention relates to an IV catheter assembly having a stationary septum actuator and a blood control septum, wherein the blood control septum is configured to slide within a catheter adapter of the IV catheter assembly between a compressed state and an uncompressed state. When in the compressed state, a slit of the blood control septum is opened and the septum comprises stored compressive potential energy. When the septum is released from the compressed state, the stored compressive potential energy is release and the blood control septum is restored to its original shape, thereby closing the septum's slit.

The disclosure relates to a catheter device (1) comprising a catheter (2) and a hypodermic introducer needle (3) further comprising a levering member (23) adapted to be removably attached to the catheter (2) and further adapted to motion the catheter from a retracted proximal position to an advanced distal position in an axial direction in relation to the introducer needle (3), further comprising indicators to indicate at least the advanced positions of the catheter (2) being advanced a distance d, said distance d corresponding to the length of the bevelled tip (18) of the needle (3), and the catheter (2) being advanced a distance D, said distance D corresponding to > the length of the bevelled tip of the needle (3).

A catheter includes a shaft and a hub that are firmly fixed to each other. The shaft is a tubular body in which a lumen extends throughout the shaft from a distal end to a proximal end. The shaft includes a shaft proximal surface at which the lumen opens and a shaft outer surface that is an outer peripheral surface of the tubular body. The hub is attached to the proximal end of the shaft. The hub includes a tubular accommodation unit configured to accommodate the shaft. The accommodation unit includes a hub melted surface directly welded to the shaft outer surface, and at least one of the accommodation unit and the hub is formed with a plurality of cavities at a position close to the hub melted surface.

An introducer assembly includes a valve having a first end and an opposite second end; a sheath fixedly secured to and extending axially from one of the first and second ends of the valve; a dilator extending through the valve and sheath; and a lock knob rotatable between locked and unlocked positions to releasably axially lock the tool relative to the sheath without causing corresponding rotation of the tool therewith.

A treatment method involves introducing a catheter into a blood vessel in an arm of the patient and is advanced to position the distal end of the catheter in a blood vessel in a lower limb on one side of the patient's body. A treatment device is inserted into the catheter and advanced to a treatment target in the lower limb on the one side of the patient's body. The catheter is then moved to shift the distal end of the catheter from the blood vessel in the lower limb on the one side of the patient's body to a blood vessel in the lower limb on the other side of the patient's body. A treatment instrument can then be introduced into the catheter and advanced to carry out treatment on a treatment target in the lower limb on the other side of the patient's body.

Extended dwell catheter assemblies each with a housing having an interior having a catheter assembly located therein, which can include a catheter tube and a needle. The catheter tube of the catheter assembly can be placed into a vein of a patient, with or without a guidewire, and then the extended dwell catheter assembly can be activated to separate into two or more housing components or by opening a gate to enable separation of the catheter assembly from the housing. A needle guard can be included to cover the needle tip of the needle from unintended needlesticks.