Intravenous catheter insertion device and method of use
First Claim
1. A catheter insertion device, comprising:
- an outer housing;
having a first end and a second end;
a tubular access needle attached to a needle carrier, wherein said needle carrier is initially fully advanced in a distal direction but slidable in a proximal direction with respect to said outer housing;
a tubular catheter releasably attached at a distal end of said outer housing and positioned coaxially around said tubular access needle;
a safety guidewire sized and configured to be advanced through said tubular access needle, wherein the safety guidewire is initially fully retracted in a proximal direction relative to said outer housing;
an actuator mechanism configured to selectively advance said safety guidewire out through said tubular access needle in a distal direction and subsequently to simultaneously withdraw said safety guidewire and said tubular access needle in a proximal direction with respect to said tubular catheter, said actuator mechanism comprising a compression spring located at a distal end of the outer housing coaxially over the tubular access needle and safety guidewire and an interlock attached at the first end to the needle and at the second end to the outer housing, which interlock can be selectively released to allow the compression spring to elongate to simultaneously withdraw said safety guidewire and said tubular access needle.
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Accused Products
Abstract
An intravenous catheter insertion device and method of use are described. The insertion device coordinates movement of an access needle, a coaxial intravenous catheter and a flexible safety guidewire. A vein is punctured with the access needle, then an actuation member on the insertion device is used to advance the safety guidewire into the vein. The safety guidewire allows the access needle and the intravenous catheter to be safely advanced into the vein. Then, the actuation member is actuated to simultaneously withdraw the access needle and the safety guidewire, leaving only the intravenous catheter in the vein. The intravenous catheter is then disconnected from the insertion device and connected to a source of intravenous fluid, medication, etc.
213 Citations
20 Claims
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1. A catheter insertion device, comprising:
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an outer housing;
having a first end and a second end;a tubular access needle attached to a needle carrier, wherein said needle carrier is initially fully advanced in a distal direction but slidable in a proximal direction with respect to said outer housing; a tubular catheter releasably attached at a distal end of said outer housing and positioned coaxially around said tubular access needle; a safety guidewire sized and configured to be advanced through said tubular access needle, wherein the safety guidewire is initially fully retracted in a proximal direction relative to said outer housing; an actuator mechanism configured to selectively advance said safety guidewire out through said tubular access needle in a distal direction and subsequently to simultaneously withdraw said safety guidewire and said tubular access needle in a proximal direction with respect to said tubular catheter, said actuator mechanism comprising a compression spring located at a distal end of the outer housing coaxially over the tubular access needle and safety guidewire and an interlock attached at the first end to the needle and at the second end to the outer housing, which interlock can be selectively released to allow the compression spring to elongate to simultaneously withdraw said safety guidewire and said tubular access needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. The catheter insertion device of claim, wherein said safety guidewire is formed from a superelastic Nickel-Titanium alloy.
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15. A method for inserting a catheter into a patient, comprising:
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providing a catheter insertion device comprising an outer housing, a tubular access needle attached to a needle carrier, an interlock attached at a first end to the needle carrier and at the second end to said outer housing, a tubular catheter releasably attached at a distal end of said outer housing and positioned coaxially around said tubular access needle, a safety guidewire sized and configured to be advanced through said tubular access needle, and an actuator mechanism having a handle coupled to the safety guidewire and a compressed spring disposed coaxially over a proximal portion of the tubular access needle and the safety guidewire; inserting a distal end of said tubular access needle into the patient; actuating the said actuator mechanism to advance said safety guidewire out through said tubular access needle in a distal direction; disengaging the tubular catheter from the outer housing; advancing a distal end of said tubular catheter over the tubular access needle and the safety guidewire into the patient; and actuating the handle of said actuator mechanism to disengage the interlock to release the needle carrier from the outer housing which allows the compressed spring to expand and engage the needle carrier and the safety guidewire to simultaneously withdraw said safety guidewire and said tubular access needle in a proximal direction with respect to said tubular catheter. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification