Urinary catheters with improved shape recovery and ease of use
Catheters including thermoplastic polyurethane polymer tubing with improved shape recovery after storage in a substantially coiled configuration are provided.
1. A catheter product comprising:
a package defining a cavity;
a catheter including a thermoplastic polyurethane polymer tubing contained within the cavity of the package, wherein at least a portion of the polymer tubing is in a substantially arcuate configuration within the cavity, the portion of the polymer tubing being defined between a proximal location on the polymer tubing and a distal location on the polymer tubing;
wherein a percent shape recovery of the portion of the polymer tubing after about 1 month at room temperature is at least 35%;
wherein the percent shape recovery of the portion of the polymer tubing is calculated by the formula:
percent shape recovery=[1−( L 0− L 2)/( L 0− L 1)]×100
where L0=length of the portion of the polymer tubing as measured from the proximal location to the distal location when in a straight configuration;
L1=the diameter of curvature of the portion of the polymer tubing when in the arcuate configuration within the cavity; and
L2=the distance between the proximal location and distal location of the portion of the polymer tubing after removal from the arcuate configuration;
wherein the storage modulus (E′) of the polymer tubing is greater than or equal to 19 MPa and less than or equal to 50 MPa and the loss modulus (E″) of the polymer tubing is greater than or equal to 2.8 MPa and less than or equal to 8.9 MPa.
2. The catheter product of claim 1 , wherein the polymer tubing has a shore hardness of at least 80 A.
3. The catheter product of claim 1 , wherein the polymer tubing has a shore hardness of between 88 A and 91 A.
4. The catheter product of claim 1 , wherein the polymer tubing comprises an annealed polymer tubing.
5. The catheter product of claim 1 , wherein the polymer tubing has been annealed for 24 hours at 100 C.
6. The catheter product of claim 1 , wherein the polymer tubing comprises polyether thermoplastic polyurethane.
7. The catheter product of claim 1 , wherein the polymer tubing comprises an aromatic thermoplastic polyurethane.
8. The catheter product of claim 1 , wherein the polymer tubing comprises a polyether aromatic thermoplastic polyurethane.
9. The catheter product of claim 1 , further comprising a hydration medium within the cavity of the package.
10. The catheter product of claim 9 , wherein the hydration medium comprises water.
11. The catheter product of claim 1 , wherein the catheter tubing has a hydrophilic coating.
12. The catheter product of claim 1 , wherein the catheter product has been sterilized with e-beam radiation.
13. The catheter product of claim 1 , wherein the package comprises a foil.
14. The catheter product of claim 1 , further comprising a sleeve at least partially covering the polymer tubing.
15. The catheter product of claim 1 , wherein the catheter is a male urinary catheter.
16. The catheter product of claim 1 , wherein the substantially arcuate configuration comprises a substantially coiled configuration.