Cannula insertion device
First Claim
Patent Images
1. An apparatus comprising:
- a cannula insertion device comprising;
a frame;
a hub mounted to the frame and arranged to be slidably moveable from a first position in a first direction to a second position relative to the frame; and
a needle projecting in the first direction from the hub, the needle being shielded by the frame when the hub is in the first position; and
a detachable cannula assembly including a cannula, the needle carrying the detachable cannula assembly;
the frame and hub arranged to allow the hub to be moved from the first position to the second position so as to insert the cannula into a patient and to be moved in a second, reverse direction backwards to a third position in which the frame shields the needle;
the apparatus further comprising;
a housing for receiving the detachable cannula assembly,wherein the cannula insertion device is removeably attached to the housing and is detachable from the housing only once the hub is in the third position,wherein the frame includes first and second arms running along opposite sides of a central portion of the frame and attached thereto by respective deformable hinges, each arm having an anterior distal end and a posterior distal end relative to the hinge of the arm, the anterior distal ends of the arms arranged to provide jaws for releasably attaching the cannula insertion device to the housing for receiving the detachable cannula assembly; and
wherein the hub has opposing surfaces for gripping between a finger and thumb of one hand and which lie outside the arms of the frame, at least a portion of the hub being deformable so as to allow the opposing surfaces to be moved inwards when pressed together.
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Accused Products
Abstract
A cannula insertion device comprises an elongate frame (4) and a hub (5) mounted to the frame and arranged to be slidably moveable from a first position forwards along a longitudinal axis to a second position relative to the frame and a needle (11) projecting forwards from the hub and carrying a detachable cannula (2) assembly including a cannula. The frame and hub are arranged to allow the hub to be moved forwards from the first position to the second position so as to insert the cannula into a patient and to be drawn backwards to a withdrawn position. The needle is shielded by the frame when the hub is in the first position and also when in the withdrawn position.
67 Citations
13 Claims
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1. An apparatus comprising:
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a cannula insertion device comprising; a frame; a hub mounted to the frame and arranged to be slidably moveable from a first position in a first direction to a second position relative to the frame; and a needle projecting in the first direction from the hub, the needle being shielded by the frame when the hub is in the first position; and a detachable cannula assembly including a cannula, the needle carrying the detachable cannula assembly; the frame and hub arranged to allow the hub to be moved from the first position to the second position so as to insert the cannula into a patient and to be moved in a second, reverse direction backwards to a third position in which the frame shields the needle; the apparatus further comprising; a housing for receiving the detachable cannula assembly, wherein the cannula insertion device is removeably attached to the housing and is detachable from the housing only once the hub is in the third position, wherein the frame includes first and second arms running along opposite sides of a central portion of the frame and attached thereto by respective deformable hinges, each arm having an anterior distal end and a posterior distal end relative to the hinge of the arm, the anterior distal ends of the arms arranged to provide jaws for releasably attaching the cannula insertion device to the housing for receiving the detachable cannula assembly; and wherein the hub has opposing surfaces for gripping between a finger and thumb of one hand and which lie outside the arms of the frame, at least a portion of the hub being deformable so as to allow the opposing surfaces to be moved inwards when pressed together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of inserting a cannula using apparatus comprising a cannula insertion device comprising a frame, a hub mounted to the frame and arranged to be slidably movable in a first direction from a first position to a second position relative to the frame and a needle projecting in the first direction from the hub along the longitudinal axis and carrying a detachable cannula assembly including a cannula, the needle being shielded by the frame when the hub is in the first position, the apparatus further comprising a housing for receiving the detachable cannula assembly, wherein the cannula insertion device is removeably attached to the housing and is detachable from the housing only once the hub is in a third position, wherein the frame includes first and second arms running along opposite sides of a central portion of the frame and attached thereto by respective deformable hinges, each arm having an anterior distal end and a posterior distal end relative to the hinge of the arm, the anterior distal ends of the arms arranged to provide jaws for releasably attaching the cannula insertion device to the housing for receiving the detachable cannula assembly;
- and wherein the hub has opposing surfaces for gripping between a finger and thumb of one hand and which lie outside the arms of the frame, at least a portion of the hub being deformable so as to allow the opposing surfaces to be moved inwards when pressed together, the method comprising;
gripping the opposing surfaces of the hub between a finger and thumb of one hand; moving the hub in the first direction from the first position to the second position so as to insert the cannula into a patient; drawing the hub in a second, reverse direction to the third position in which the frame shields the needle; and detaching the cannula insertion device from the housing when the hub is in the third position.
- and wherein the hub has opposing surfaces for gripping between a finger and thumb of one hand and which lie outside the arms of the frame, at least a portion of the hub being deformable so as to allow the opposing surfaces to be moved inwards when pressed together, the method comprising;
Specification