Device for introducing a catheter into a body cavity
First Claim
1. A device for introducing a catheter into a body cavity, comprisinga catheter having a proximal end and a distal end, anda needle having a tip and being arranged to be moved within the catheter and to be positioned in such a manner that the tip of the needle protrudes from the catheter on the distal end thereof, whereinthe needle is shorter than the catheter and has a closed proximal end attached to a flexible handling thread having a diameter smaller than that of the needle and protruding from the proximal end of the catheter in each position of the needle within the catheter.
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Accused Products
Abstract
A catheter for spinal anesthesia has a needle arranged therein. The length of the needle is smaller than the length of the catheter. The rear end of the needle is connected to a handling thread for pulling the needle out of the catheter towards the proximal end. The needle is designed as a hollow needle with a lateral opening. When advancing the tip of the needle into the subarachnoid space, liquor flows through the opening into the catheter, allowing for verification of successful puncture. During puncture of the dura with the tip of the needle, the puncture hole is widened by the front end of the catheter so that the catheter fills the puncture hole completely. After puncture, the needle is withdrawn by pulling the handling thread.
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Citations
11 Claims
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1. A device for introducing a catheter into a body cavity, comprising
a catheter having a proximal end and a distal end, and a needle having a tip and being arranged to be moved within the catheter and to be positioned in such a manner that the tip of the needle protrudes from the catheter on the distal end thereof, wherein the needle is shorter than the catheter and has a closed proximal end attached to a flexible handling thread having a diameter smaller than that of the needle and protruding from the proximal end of the catheter in each position of the needle within the catheter.
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7. A device for introducing a catheter into a body cavity, comprising
a catheter having a proximal end and a distal end, and a needle having a tip and being arranged to be moved within the catheter and to be positioned in such a manner that the tip of the needle protrudes from the catheter on the distal end thereof, wherein the needle is shorter than the catheter and is attached to a handling thread having a diameter smaller than that of the needle and protruding from the proximal end of the catheter in each position of the needle within the catheter, wherein the proximal end of the needle is truncated.
Specification