Access port and catheter assembly including catheter distal portion stability features
A catheter for insertion into a body of a patient, and methods of making and using. The catheter can include a distal portion that remains stable during fluid infusion into the patient, thus reducing or eliminating whipping of the catheter distal tip. The catheter includes at least one lumen and can be configured such that the arithmetic product of an elastic modulus and an area moment of inertia for the distal portion of the catheter is greater than the arithmetic product of an elastic modulus and an area moment of inertia for a proximal portion. The catheter can be attached to an implantable access port that may include features for use as a power injectable access port.
1. A method of manufacturing an implantable vascular access port system, the method comprising:
producing an implantable vascular access port; and
forming a catheter designed for coupling to the implantable vascular access port, the catheter comprising:
at least one lumen extending from a proximal end to a distal end;
a proximal portion including a first cross sectional lumen area;
a distal portion including a second cross sectional lumen area larger than the first cross sectional lumen area, the distal portion designed to prevent whipping when the catheter is disposed in a patient and a fluid exits the at least one lumen; and
a taper region interposed between the proximal portion and the distal portion, the taper region having a cross sectional lumen area transitioning from the first cross sectional lumen area to the second cross sectional lumen area.
2. The method of manufacturing according to claim 1 , wherein the forming step comprises extruding the catheter from a thermoplastic polyurethane material.
3. The method of manufacturing according to claim 1 , wherein the forming step comprises forming the distal portion of the catheter to have an area moment of inertia greater than an area moment of inertia of the proximal portion of the catheter.
4. The method of manufacturing according to claim 3 , wherein the forming step comprises forming at least part of the distal portion of the catheter to have an arithmetic product of an elastic modulus greater than an arithmetic product of an elastic modulus of at least part of the proximal portion of the catheter.
5. The method of manufacturing according to claim 1 , wherein the forming step comprises forming the proximal portion of the catheter to include a proximal taper region transitioning from a third cross sectional lumen area at the proximal end of the catheter to the first cross sectional lumen area, the third cross sectional lumen area greater than the first cross sectional lumen area.
6. The method of manufacturing according to claim 1 , wherein the producing step comprises making the implantable vascular access port for placement in a limb of the patient.
7. The method of manufacturing according to claim 6 , wherein the producing step comprises making the implantable vascular access port for placement in an arm of the patient.
8. The method of manufacturing according to claim 7 , wherein the forming step comprises forming the proximal portion of the catheter for placement in a vein in the arm of the patient.
9. The method of manufacturing according to claim 8 , wherein the forming step comprises forming the proximal portion of the catheter for placement in at least one of a basilic vein and an axillary vein, and forming the distal portion of the catheter for placement in a subclavian vein.
10. The method of manufacturing according to claim 1 , wherein the producing step comprises including power injectable features in the implantable vascular access port for use as a power injectable access port.