Amniotic membrane perforator

• US 5,968,055 A
• Filed: 05/11/1998
• Issued: 10/19/1999
• Est. Priority Date: 05/11/1998
• Status: Expired due to Fees

• Current Assignee: Coopersurgical Incorporated (The Cooper Cos., Inc.)
• Original Assignee: Prism Enterprises LP (The Cooper Cos., Inc.)
• Inventors: Dimitriu, Dan G.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): HO, TAN-UYEN THI
• Application Number:
  US09/076,176
• Time in Patent Office: 526 Days
• Field of Search: 606/125, 606/167, 606/185, 606/184, 606/171, 606/1, 604/176, 604/115, 30/298, 30/286, 401/8
• US Class Current: 606/125
• CPC Class Codes: A61B 17/4208 Instruments for rupturing the amniotic membrane

Abstract

An amniotic membrane perforator comprising an elongated shaft portion having an arcuate bend at the proximal end of the shaft and a hook at the distal end of the shaft. A flag portion extends perpendicularly to the shaft substantially adjacent the distal end of the shaft, opposite the hook. The cross-section of an extended length of the shaft inward the distal end is substanially oval. During use, the physician'"'"'s index finger is placed along the flat portion, and the thumb and second finger adjacent the oval cross-section portion.

Claims

1. An amniotic membrane perforator to be cradled in the hand of a user, the perforator comprising:

an elongated shaft having a proximal end and a distal end, the shaft being substantially disposed in a first plane;

a hook disposed at the distal end of the shaft;

a widened flat portion disposed in a second plane substantially normal to the first plane, the flat portion being disposed substantially at or adjacent the distal end of the shaft and opposite the hook such that when the perforator is cradled in the user'"'"'s hand, an index finger of the user may be disposed adjacent the flat portion whereby the user may control the movement of the hook in the first plane by the index finger exerting a force on the widened flat portion.

2. The amniotic membrane perforator of claim 1 wherein the shaft further comprises an arcuate portion substantially adjacent the proximal end.

3. The amniotic membrane perforator of claim 1 wherein the shaft has an I-beam-like cross-section along at least a portion of its length.

4. The amniotic membrane perforator of claim 1 wherein the shaft has a oval cross-section along a portion of its length spaced inward from the distal end of the shaft.

5. The amniotic membrane perforator of claim 3 wherein the shaft has a oval cross-section along a portion of its length spaced inward from the distal end of the shaft.

6. The amniotic membrane perforator of claim 2 wherein the shaft has an I-beam-like cross-section along at least a portion of its length.

7. The amniotic membrane perforator of claim 2 wherein the shaft has a oval cross-section along a portion of its length spaced inward from the distal end of the shaft.

8. The amniotic membrane perforator of claim 6 wherein the shaft has a oval cross-section along a portion of its length spaced inward from the distal end of the shaft.

9. The amniotic membrane perforator of claim 1 wherein the flat portion is oval shaped.

10. The amniotic membrane perforator of claim 9 wherein the flat portion is on the order of one-quarter of an inch wide.

11. An amniotic membrane perforator to be cradled in the hand of a user, the perforator comprising:

an elongated shaft having a proximal end and a distal end, the shaft being substantially disposed in a first plane;

a hook disposed at the distal end of the shaft;

the shaft further comprises an arcuate portion substantially adjacent the proximal end, the arcuate portion being adapted to be disposed substantially subjacent the user'"'"'s wrist when cradled in the user'"'"'s hand.

12. The amniotic membrane perforator of claim 11 further comprising a widened flat portion disposed in a second plane substantially normal to the first plane, the flat portion being disposed substantially at or adjacent the distal end of the shaft and opposite the hook such that when the perforator is cradled in the user'"'"'s hand, an index finger of the user may be disposed adjacent the flat portion.

13. The amniotic membrane perforator of claim 11 wherein the shaft has an I-beam-like cross-section along at least a portion of its length.

14. The amniotic membrane perforator of claim 11 wherein the shaft has a oval cross-section along a portion of its length spaced inward from the distal end of the shaft.

15. The amniotic membrane perforator of claim 13 wherein the shaft has a oval cross-section along a portion of its length spaced inward from the distal end of the shaft.

16. The amniotic membrane perforator of claim 11 wherein the arcuate portion has a radius on the order of 21/24 inches.

17. The amniotic membrane perforator of claim 11 wherein the arcuate portion has a radius shaft on the order of 2 to 3 inches.

18. The amniotic membrane perforator of claim 16 wherein the arcuate portion has an arc on the order of 45°

to 60°

.

19. The amniotic membrane perforator of claim 11 wherein the flat portion is oval shaped.

20. The amniotic membrane perforator of claim 19 wherein the flat portion is on the order of one-quarter of an inch wide.