GELS HAVING PERMANENT TACK FREE COATINGS AND METHOD OF MANUFACTURE

The present invention is directed to tack-free gels and to methods for manufacturing a tack-free gel pad, in which a discontinuous layer of fluorinated ultrahigh molecular weight polyethylene is permanently bonded to the gel pad to provide a tack-free coating. The gel pad may be incorporated into a gel cap to provide a surgical access device having a tack-free surface. 1. A method for making a tack-free gel , comprising the steps of:providing a mold;applying a fluorinated ultrahigh molecular weight polyethylene to the mold;heating a gel slurry beyond its curing temperature to a molten state, to thereby produce a molten gel;injecting the molten gel into the mold; andcooling the mold until the gel is set to thereby produce a tack-free gel.2. The method of claim 1 , wherein the mold is textured prior to applying the fluorinated ultrahigh molecular weight polyethylene by spraying the mold with blast media.3. The method of claim 1 , wherein the mold is preheated to a temperature of approximately 220° F. to approximately 260° F. prior to applying the fluorinated ultrahigh molecular weight polyethylene.4. The method of claim 1 , wherein the fluorinated ultrahigh molecular weight polyethylene is applied to the mold by electrostatic coating.5. The method of claim 1 , wherein the fluorinated ultrahigh molecular weight polyethylene comprises a powder having a particle size of approximately 5 μm to approximately 100 μm.6. The method of claim 1 , wherein the mold is preheated to a temperature of approximately 110° F. to approximately 160° F. prior to injecting the molten gel.7. The method of claim 1 , wherein the gel slurry comprises an oil and an elastomer.8. The method of claim 7 , wherein the gel slurry comprises a ratio by weight of oil to elastomer from approximately 7:1 to approximately 10:1.9. The method of claim 7 , wherein the oil comprises a mineral oil and the elastomer comprises block copolymer styrene-ethylene/butylene-styrene polymer.10. The method of claim 1 , ...

Gels having permanent tack free coatings and method of manufacture

The present invention is directed to tack-free gels and to methods for manufacturing a tack-free gel pad, in which a discontinuous layer of fluorinated ultrahigh molecular weight polyethylene is permanently bonded to the gel pad to provide a tack-free coating. The gel pad may be incorporated into a gel cap to provide a surgical access device having a tack-free surface.

Medical valve with positive flow characteristics

A medical valve device for use in selectively establishing a fluid flow between first and second medical implements is disclosed. The valve has a body defining a passage from a first port to a second port. The valve defines a fist fluid volume when both medical implements are connected thereto, and a second, smaller volume when one of the implements is disconnected, thereby causing a positive flow of fluid from the valve to the second medical implement when the first implement is disconnected.

Positive flow valve

A closed system, spikeless, positive-flow valve device includes a body defining an internal cavity. At the proximal end of the body is an opening which is preferably sufficiently large to receive an ANSI standard tip of a medical implement. The valve includes a plastic, resilient silicon seal which fills the upper cavity and opening with an oval seal cap having a slit. The opening presses the oval seal cap to keep the slit closed in the decompressed state. The slit opens as the nose of the medical implement compresses the seal into the cavity and the seal cap is free from the opening. The housing also includes a fluid space which facilitates fluid flow between the medical implement and a catheter tip. The fluid space within the valve automatically and reversibly increases upon insertion of the medical implement into the cavity and decreases upon withdrawal of the medical implement, such that a positive flow from the valve toward the catheter tip is effected upon withdrawal of the medical implement, thereby preventing a flow of blood from a patient into the catheter when the medical implement is removed from the valve.

Locking blunt cannula

Disclosed is a medical connector for introducing medication to a patient in a safe, convenient way by releasably locking an influent fluid line to a receiving port, and method of manufacturing the same. The connector comprises a cannula recessed within a cavity defined by a housing. The housing contains a retaining ridge and gripping members to prevent accidental disconnection of the connector for the port.

Cryosurgical probe with bellows shaft

The malleable cryosurgical probe (10) includes a cryostat assembly (11) and a cryoprobe (12) assembly. The cryostat assembly includes an elongated shaft assembly having a bellows (13) portion thereof and aclosed distal end. The shaft assembly includes at least one freezing portion comprising the bellows poriton, at least one thermally insulated portion and a thermally insulating element positioned about the thermally insulated portion. A cryostat is operably associated with the elongated shaft assembly.

MEDIUM VALVE WITH POSITIVE FLOW CHARACTERISTICS

Medical valve with positive flow characteristics

A medical valve device for use in selectively establishing a fluid flow between first and second medical implements is disclosed. The valve has a body defining a passage from a first port to a second port. The valve defines a first fluid volume when both medical implements are connected thereto, and a second, smaller volume when one of the implements is disconnected, thereby causing a positive flow of fluid from the valve to the second medical implement when the first implement is disconnected.

Positive flow valve for controlling flow between medical implement and catheter tip with seal increasing or decreasing in size when moved between two positions

A closed system, spikeless, positive-flow valve device includes a body defining an internal cavity. At the proximal end of the body is an opening which is preferably sufficiently large to receive an ANSI standard tip of a medical implement. The valve includes a plastic, resilient silicon seal which fills the upper cavity and opening with an oval seal cap having a slit. The opening presses the oval seal cap to keep the slit closed in the decompressed state. The slit opens as the nose of the medical implement compresses the seal into the cavity and the seal cap is free from the opening. The housing also includes a fluid space which facilitates fluid flow between the medical implement and a catheter tip. The fluid space within the valve automatically and reversibly increases upon insertion of the medical implement into the cavity and decreases upon withdrawal of the medical implement, such that a positive flow from the valve toward the catheter tip is effected upon withdrawal of the medical implement, thereby preventing a flow of blood from a patient into the catheter when the medical implement is removed from the valve.

Positive flow valve

A closed system, spikeless, positive-flow valve device includes a body defining an internal cavity. At the proximal end of the body is an opening which is preferably sufficiently large to receive an ANSI standard tip of a medical implement. The valve includes a plastic, resilient silicon seal which fills the upper cavity and opening with an oval seal cap having a slit. The opening presses the oval seal cap to keep the slit closed in the decompressed state. The slit opens as the nose of the medical implement compresses the seal into the cavity and the seal cap is free from the opening. The housing also includes a fluid space which facilitates fluid flow between the medical implement and a catheter tip. The fluid space within the valve automatically and reversibly increases upon insertion of the medical implement into the cavity and decreases upon withdrawal of the medical implement, such that a positive flow from the valve toward the catheter tip is effected upon withdrawal of the medical implement, thereby preventing a flow of blood from a patient into the catheter when the medical implement is removed from the valve.

Stent delivery system

A stent delivery catheter is disclosed. The catheter includes an inner catheter tube and an outer catheter tube which are rotatable relative to each other. The inner catheter and outer catheter include releasable attachment structures to releasably engage the ends of the stent. A proximal hand piece includes controls for enlarging and deploying the stent in a body lumen.

Stent delivery system

A stent delivery catheter is disclosed. The catheter includes an inner catheter tube and an outer catheter tube which are rotatable relative to each other. The inner catheter and outer catheter include releasable attachment structures to releasably engage the ends of the stent. A proximal hand piece includes controls for enlarging and deploying the stent in a body lumen.

Medizinisches ventil mit positiven strömungseigenschaften

Positives durchflussventil

Medizinisches ventil mit positiven strömungseigenschaften

Insertion device for stents and methods for use

A stent delivery catheter (70) comprises an outer sheath (75), and an inner tubular member (80) which distally ends in a tongue (82) having an arcuate cross section.

Positive flow valve

Festklemmbare stumpfe kanüle