Catheter
First Claim
1. In a method of making a catheter, the steps of severing resilient flexible tubing including cutting the tubing generally in a plane at an angle to the longitudinal axis of the tubing to effect a distal end wall having a distal tip, a proximal wall portion, and a pair of opposed sidewalls connecting the distal tip with the proximal wall portion, and such that the proximal wall portion protrudes distally beyond the dista end of the tubing when the opposed end walls are pinched together adjacent the proximal end wall portion, and the tubing being in a substantially unflattened state at the cutting site when said step of severing is initiated, displacing a sufficient part of the proximal wall portion to substantially prevent the proximal wall portion from protruding distally beyond the distal end of the tubing when the sidewalls are pinched together adjacent the proximal end wall portion.
3 Assignments
0 Petitions
Accused Products
Abstract
An intercostal catheter is provided which, when the distal end is flattened for insertion into an incision of a patient from the exterior, has a distal end that is smooth and substantially free of deleterious protuberances to minimize damage the patient. A method of making an intercostal catheter is provided that includes the steps of severing tubing at an acute angle to its longitudinal axis, and displacing a portion of the proximal extremity of the end wall of the severed end to prevent the occurrence of a protuberance when the tube end is flattened for insertion.
81 Citations
17 Claims
- 1. In a method of making a catheter, the steps of severing resilient flexible tubing including cutting the tubing generally in a plane at an angle to the longitudinal axis of the tubing to effect a distal end wall having a distal tip, a proximal wall portion, and a pair of opposed sidewalls connecting the distal tip with the proximal wall portion, and such that the proximal wall portion protrudes distally beyond the dista end of the tubing when the opposed end walls are pinched together adjacent the proximal end wall portion, and the tubing being in a substantially unflattened state at the cutting site when said step of severing is initiated, displacing a sufficient part of the proximal wall portion to substantially prevent the proximal wall portion from protruding distally beyond the distal end of the tubing when the sidewalls are pinched together adjacent the proximal end wall portion.
- 7. In a method of making an intercostal catheter having a distal end wall adapted to be inserted into an incision in a patient from the exterior of the patient, the steps of severing resilient flexible tubing including cutting the tubing in a plane at an angle to the longitudinal axis of the tubing to effect a distal end wall having radially inner and outer edges and defining a distal end opening, the distal end wall having a distal tip, a proximal end wall portion inclined radially inwardly, and opposed side wall portions connected between the distal tip and the tubing being in a substantially unflattened state at the cutting site when said step of severing is initiated, proximal end wall portion, the proximal end wall portion being invertible in response to the substantial flattening of the distal end of the tubing by movement of the opposed sidewall portions together with the tubing creased longitudinally at the most proximal point on the outer edge to thereby effect a protruding part of the proximal end wall portion that etends distally outwardly beyond the outer edge of the end wall, and displacing a sufficient portion of the proximal end wall portion to substantially prevent the proximal end wall portion from extending beyond the outer edge when the distal end of the tubing is similarly flattened.
Specification