A catheter advancement device to assist with the ease and sterility of insertion of catheters and other elongate, flexible medical devices is disclosed. It includes two one-way valves that may be reciprocated with respect to each other. Some variations may include a demount gap which may be continuously opened or may be controllable opened and closed.

A catheter advancement device to assist with the ease and sterility of insertion of catheters and other elongate, flexible medical devices is disclosed. It includes two one-way valves that may be reciprocated with respect to each other. Some variations may include a demount gap which may be continuously opened or may be controllable opened and closed.

A sheath introducer for use with a catheter, has a hub and a tube through which the catheter extends, and a lock assembly which has a rotational knob that actuates a plurality of prongs arranged in a radial pattern around a hole in the hub that receives the catheter, wherein the prongs synchronously rotate in one direction to grip the catheter or in the other direction to release the catheter.

A catheter insertion device which employs back-and-forth longitudinal axial movement to advance the catheter by the cooperative interface of an incline ramp and a decline ramp with a split gripping mechanism is described.

In one representative embodiment, a gripping and pushing device for a medical instrument comprises an elongated main body defining a lumen. The elongated main body comprises one or more deflectable portions that can be pressed radially inwardly toward a shaft of the medical instrument extending through the lumen. One or more elastomeric gripping layers can be secured to the inner surface of a respective deflectable portion at axially spaced apart attachment locations. The one or more gripping layers are axially deformable relative to the one or more deflectable portions between the attachment locations when manual pressure is applied to the one or more deflectable portions to press the one or more gripping layers against the shaft and move the shaft longitudinally into a patient's body.

In one representative embodiment, a gripping and pushing device for a medical instrument comprises an elongated main body defining a lumen. The elongated main body comprises one or more deflectable portions that can be pressed radially inwardly toward a shaft of the medical instrument extending through the lumen. One or more elastomeric gripping layers can be secured to the inner surface of a respective deflectable portion at axially spaced apart attachment locations. The one or more gripping layers are axially deformable relative to the one or more deflectable portions between the attachment locations when manual pressure is applied to the one or more deflectable portions to press the one or more gripping layers against the shaft and move the shaft longitudinally into a patient's body.

The disclosure relates to a guide wire friction feedback device and method for interventional surgical robot. The friction feedback device includes two sets of driving end parts, driven end parts and clamping parts symmetrically arranged along the guide wire. The structure of the friction feedback device is relatively simple, compact and stable. When the clamping part is subjected to the force in the clamping direction of the guide wire, the force is transmitted to the right-angle connecting plate through the U-shaped slot connector, the first slider and the first micro linear guide. The high precision load cell only measures the axial force of the guide wire, that is, the push-pull force felt by the high precision load cell (that is, the friction on the guide wire), so as to judge the force change of the axial friction of the guide wire.

A catheter insertion device which employs back-and-forth longitudinal axial movement to advance the catheter by the cooperative interface of an incline ramp and a decline ramp with a split gripping mechanism is described.

A tubular insertion aid for catheter manipulation is disclosed. The insertion aid is particularly suited for urinary catheters, such as hydrophilic urinary catheters for intermittent use. The insertion aid comprises a forward opening, a rearward opening and a slit opening extending along a part of the sidewall of the tubular insertion aid, so that a first portion of the tubular insertion aid in the axial direction forms a solid circumference around the tubular insertion aid, and a second portion in the axial direction is provided with the slit opening extending in an axial direction of the tubular insertion aid. The tubular insertion aid further comprises a first inward protrusion formed on the interior side of the tubular insertion aid in a part of the second portion being provided with the slit, wherein the first inward protrusion is arranged along a first protrusion line extending along the inward circumference of the tubular insertion aid essentially perpendicularly to the axial direction of the tubular insertion aid.

A delivery system for placing a gastrointestinal device in a mammalian gastrointestinal tract comprises a container assembly; a gastrointestinal implant device that includes proximal and distal ends stored within the container assembly, the proximal end including an anchor and the distal end including a sleeve, coupled to the anchor and folded into the container assembly; and an inner extension to draw a portion of the sleeve from the anchor and from the container assembly as the anchor is retained therein. The inner extension comprises an atraumatic tip, such as a ball, that includes a guidewire rail. Further, a handle is provided that retains or captures an inner catheter within the handle. Within the handle is an elongated element that surrounds a portion of the catheter. A button on a side of the handle is configured to cause engagement of the catheter via the element when the button is depressed.