Catheter or cannula system
First Claim
1. A cannula adapted to be mounted on to a trocar, the cannula incorporating a press point which is adapted to be resiliently deformed by externally applied pressure by at least one finger of a person during the insertion of the cannula and trocar assembly into a patient and removal of the trocar so as to prevent a flow of fluid through the cannula during the insertion and removal, and at least one integrally moulded hinged valve piece bearing against the press point and resiliently deform the press point to prevent flow through the cannula.
1 Assignment
0 Petitions
Accused Products
Abstract
A catheter or cannula (2) which includes a press or pinch point (18) which may be resiliently deformed to prevent flow of blood or other body fluids during insertion of the catheter or cannula tube (10) or it may be part of the boss (11) of the catheter or cannula (2). One or more protrusions or buttons (20) may be integrally moulded to the press or pinch point (18) to assist with the application of pressure to the press or pinch point (18) to prevent fluid flow. Wings (14) extending from the sides of the cannula or catheter (2) may provide support and be hinged to enable compression of the press or pinch point (18). The cathether or cannula tube (10) is of a size to fit over a hypodermic needle (5) of a trocar (1) inserted into the catheter or cannula (2).
81 Citations
29 Claims
- 1. A cannula adapted to be mounted on to a trocar, the cannula incorporating a press point which is adapted to be resiliently deformed by externally applied pressure by at least one finger of a person during the insertion of the cannula and trocar assembly into a patient and removal of the trocar so as to prevent a flow of fluid through the cannula during the insertion and removal, and at least one integrally moulded hinged valve piece bearing against the press point and resiliently deform the press point to prevent flow through the cannula.
- 13. A cannula adapted to be mounted on to a trocar, the cannula incorporating a press point which is adapted to be resiliently deformed by externally applied pressure by at least one finger of a person during the insertion of the cannula and trocar assembly into a patient and removal of the trocar so as to prevent a flow of fluid through the cannula during the insertion and removal, wherein the cannula comprises a body and a cannula tube and the portion which is adapted to be resiliently deformed is part of the body and the press point includes at least one integrally moulded projection to thereby facilitate positive deformation of the press point, said at least one integrally moulded projection comprises valve pieces, said valve pieces being hinged to bear against the press point and resiliently deform the press point to thereby restrict flow through the cannula.
- 22. A cannula including a body and a cannula tube, the body including a first portion into which the catheter tube is mounted and a connection portion which enables the cannula to be connected to another item, the cannula further including a press point associated with the body between the first portion and the connector portion, the press point being adapted to be pinched by externally applied pressure to restrict flow through the cannula during insertion of the cannula into a patient, wherein the first portion and the second portion are connected by a frame arrangement and the press point is included on a flexible tube received into the frame arrangement between the first portion and the connector portion and sealingly engaging the first portion and the second portions respectively and the press point includes at least one integrally moulded projection extending outwardly of the frame arrangement to thereby facilitate positive compression of the press point, said at least one integrally moulded projection comprises valve pieces, said valve pieces being hinged to bear against the press point and resiliently deform the press point to thereby restrict flow through the cannula.
- 28. An adaptor piece for a cannula, the adaptor piece comprising a first end portion into which the cannula tube may be mounted and a connection end portion to enable the adaptor piece to be connected to another item, the adaptor piece further including a press point between the first end portion and the connector end portion, wherein the first end portion and the second end portion are connected by a frame arrangement and the press point is included on a flexible tube received into the frame arrangement between the first end portion and the connector end portion and sealingly engaging the first end portion and the second end portion respectively and the flexible tube includes at least one integrally moulded projection to thereby facilitate positive deformation of the press point said at least one integrally moulded projection comprises valve pieces said valve pieces, being hinged to bear against the press point and resiliently deform the press point to thereby restrict flow through the cannula.
Specification