Medical instruments
View Patent ↗A medical instrument includes a gripping section having a first portion having a first composition, and a second portion over a selected portion of the first portion. The second portion has a second composition different than the first composition.
1. A needle biopsy instrument, comprising:
a cannula;
a stylet at least partially within the cannula; and
a handle in which at least a portion of the cannula and stylet are located, the handle having
a first portion having a first composition,
a second portion over a selected portion of the first portion, the second portion having a second composition different than the first composition, and
a third portion over a selected portion of the first portion, the third portion having a third composition different than the first and second compositions.
2. The instrument of claim 1 , wherein the handle is generally linear.
3. The instrument of claim 1 , wherein the handle is a pistol-like grip.
4. The instrument of claim 1 , wherein the handle includes grooves configured to receive a user's finger during use.
5. The instrument of claim 1 , wherein the first composition comprises aluminum.
6. The instrument of claim 1 , wherein the first composition comprises a polymer.
7. The instrument of claim 1 , wherein the first composition includes a material selected from the group consisting of polycarbonate and acrylonitrile-butadiene-styrene.
8. The instrument of claim 1 , wherein the first composition is harder than the second composition.
9. The instrument of claim 1 , wherein the second composition comprises a polymer.
10. The instrument of claim 1 , wherein the second composition comprises a foam.
11. The instrument of claim 1 , wherein the second composition comprises a material that results from mixing a foamable, curable polyurethane prepolymer and an aqueous phase containing a latex and a surfactant.
12. The instrument of claim 1 , wherein the second composition comprises a urethane.
13. The instrument of claim 1 , wherein the second portion defines a flexible ridge.
14. The instrument of claim 1 , wherein the second portion defines a plurality of flexible ridges.
15. The instrument of claim 1 , wherein the handle has a recess, and the second portion is over the recess.
16. The instrument of claim 1 , wherein the handle further comprises an adhesive between the first portion and the second portion.
17. The instrument of claim 1 , wherein the second portion interlocks with the first portion.
18. The instrument of claim 1 , wherein the second portion contacts a user during use.
19. The instrument of claim 1 , wherein the second portion substantially covers the first portion.
20. The instrument of claim 1 , wherein the second portion is over more than about 20% of the surface area of the handle.
21. The instrument of claim 1 , wherein the second portion is over more than about 40% of the surface area of the handle.
22. The instrument of claim 1 , wherein the second composition has a hardness of less than about 100 Shore A.
23. The instrument of claim 1 , wherein the third composition comprises a polymer.
24. The instrument of claim 1 , wherein the third composition comprises a foam.
25. The instrument of claim 1 , wherein the third composition comprises a urethane.
26. The instrument of claim 1 , wherein the handle further comprises an adhesive between the first portion and the third portion.
27. The instrument of claim 1 , wherein the third portion interlocks with the first portion.
28. The instrument of claim 1 , wherein the third portion contacts a user during use.
29. The instrument of claim 1 , wherein the third composition has a hardness of less than about 100 Shore A.