Umbilical cord clip and applicator

• US 5,462,555 A
• Filed: 12/30/1993
• Issued: 10/31/1995
• Est. Priority Date: 12/30/1993
• Status: Expired due to Term

• Current Assignee: United States Surgical Corporation (Medtronic Plc)
• Original Assignee: United States Surgical Corporation (Medtronic Plc)
• Inventors: Bolanos, Henry, Sater, Ghaleb A., DeFonzo, Stephan A., Young, Wayne P.
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): DAWSON, GLENN K
• Application Number:
  US08/175,816
• Time in Patent Office: 670 Days
• Field of Search: 606/1, 606/110-112, 606/118-120, 606/135-137, 606/142, 606/151, 606/157, 606/167, 606/172
• US Class Current: 606/120
• CPC Class Codes: A61B 17/122 Clamps or clips , e.g. for the umbilical cord for the vas deferens A61F6/206
• CPC Class Codes: A61B 17/128 for applying or removing clamps or clips
• CPC Class Codes: A61B 17/32 Surgical cutting instruments A61B18/042 takes precedence; suture cutters A61B17/0467; instruments for ligaturing or cutting A61B17/128; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133
• CPC Class Codes: A61B 2090/0801 Prevention of accidental cutting or pricking

Abstract

An umbilical cord clip and applicator is disclosed for clamping a maternal side of an umbilical cord, applying an umbilical cord clip to a fetal side of the umbilical cord and severing the cord intermediate the clamped maternal and fetal sides of the umbilical cord. The applicator includes a first arm having a first clamping surface, a second arm movably affixed to the first arm and having a second clamping surface and structure associated with at least one the first and second arms for mounting an umbilical cord clip thereon. The applicator also includes a recessed severing mechanism operatively associated with the first and second arms and disposed intermediate the first and second clamping surfaces and the mounting structure. The severing mechanism is automatically actuable upon closure of the first and second arms about an umbilical cord to sever the cord at a location between the first and second clamping surfaces and the clip. The umbilical cord clip includes a first leg having a first clamping surface and a second leg movably affixed to the first leg and having a second clamping surface. A lock device is associated with the first and second legs for maintaining the first and second legs in a closed position about the umbilical cord. Attachment structure is also associated with at least one of the first and second legs. The attachment structure is releasably engagable with the mounting structure on the applicator to hold the umbilical cord clip on the applicator.

Claims

1. A surgical instrument for clamping and severing an umbilical cord comprising:

a) a first arm having a first clamping surface;

b) a second arm movably affixed to said first arm and having a second clamping surface; and

c) a severing mechanism mounted for movement with respect to said first and second arms, said severing mechanism at least partially movable relative to said first and second arms solely in response to closure of said first and second arms about an umbilical cord to sever the umbilical cord clamped therebetween.

2. The surgical instrument as recited in claim 1 further comprising a latch mechanism associated with said first and second arms for maintaining said first and second arms in a closed position about the umbilical cord.

3. A surgical instrument for clamping and severing an umbilical cord comprising:

a) a first arm having a first clamping surface;

b) a second arm movably affixed to said first arm and having a second clamping surface; and

c) a severing mechanism mounted for movement with respect to said first and second arms, said severing mechanism at lest partially movable relative to said first and second arms by closure of said first and second arms about an umbilical cord to sever the umbilical cord clamped therebetween said severing mechanism including

i) a movable knife assembly having a knife blade, said assembly operatively associated with said first arm for moving said knife blade between a first position within said first arm to a second position projecting from said first arm; and

ii) an actuation member affixed to said second arm for actuating said knife assembly to move said knife blade between said first and second positions upon closure of said first and second arms about the umbilical cord.

4. The surgical instrument as recited in claim 3, wherein said moveable knife assembly includes:

a) a carrier member pivotally associated with said first arm and holding said knife blade;

b) a wedge member slidably disposed within said first arm and engagable with said carrier member to move said knife blade between said first and second positions; and

c) a cam member pivotally affixed to said first arm, wherein said cam member is engagable with said actuation member upon closure of said first and second arms about the umbilical cord and urges said wedge member into engagement with said carrier member.

5. A surgical instrument for clamping and severing an umbilical cord and applying an umbilical cord clip about a section of the cord, the clip having a first clamping leg, a second clamping leg movably affixed to the first clamping leg and lock means for holding the first and second clamping legs about the umbilical cord, said surgical instrument comprising:

a) a first arm having a first clamping surface;

b) a second arm movably affixed to said first arm and having a second clamping surface;

c) a severing mechanism mounted for movement with respect to said first and second arms, said severing mechanism at least partially movable relative to said first and second arms by closure of said first and second arms about an umbilical cord to sever the umbilical cord clamped therebetween;

d) mounting means associated with at least one of said first and second arms and configured for engagement with corresponding mounting means on at least one of the first and second clamping legs of the clip to maintain the clip in position on the surgical instrument; and

e) means for ejecting the clip from said first and second arms including a rigid post formed on said second arm and a flexible post formed on said first arm and configured to abut the clip, wherein closure of said first and second arms causes said rigid post to engage and deflect said flexible post to force the abutting clip away from said first and second arms.

6. The surgical instrument as recited in claim 5, wherein said mounting means of the surgical instrument includes an elongated tab member projecting transversely from at least one of said first and second arms, said tab member configured to be releasably engagable with the mounting means on at least one of the first and second clamping legs.

7. The surgical instrument as recited in claim 5, wherein said mounting means of the surgical instrument includes a pair of longitudinally spaced pins, said pins projecting transversely from at least one of said arms and configured for engagement with the corresponding mounting means on at least one of the first and second clamping legs.

8. The surgical instrument as recited in claim 5, wherein said mounting means of the surgical instrument includes a proximally extending projection formed at a distal end of at least one of said first and second arms and configured for engagement with at least a portion of the lock means on the clip to maintain the clip in position on said surgical instrument.

9. The surgical instrument as recited in claim 8, wherein said proximally extending projection is configured to engage a first portion of the lock means, said projection being cammed out of engagement with the first portion by a second portion of the lock means upon closure of the clip about the umbilical cord to release the clip from the surgical instrument.

10. The surgical instrument as recited in claim 5, wherein said mounting means of the surgical instrument includes a transversely extending projection formed on a proximal end of one of said first and second arms, said projection configured for engagement with the umbilical cord clip to maintain the clip in position on the surgical instrument during closure of the clip about the umbilical cord.

11. The surgical instrument as recited in claim 10, further comprising a projection formed on the other of said first and second arms and engagable with said transversely extending projection upon closure of said first and second arms to cam said transversely extending projection out of engagement with said clip.

12. The surgical instrument as recited in claim 5, wherein said severing mechanism includes:

a) a deflectable knife member movably mounted with respect to said first arm; and

b) a projection mounted on said second arm and extending towards said first arm, wherein closure of said first and second arms about the umbilical cord causes said projection to deflect said knife member away from said first arm and towards said second arm to sever the umbilical cord captured between said first and second arms.

13. An applicator and umbilical cord clip for clamping an umbilical cord, applying an umbilical cord clip to the umbilical cord and severing the cord intermediate the clamped and clipped sides of the umbilical cord, comprising:

a) an applicator having;

i) a first arm having a first clamping surface;

ii) a second arm movably affixed to said first arm and having a second clamping surface;

iii) means positioned on at least one of said first and second arms for mounting at least one umbilical cord clip thereon;

iv) a recessed severing mechanism operatively associated with and mounted for movement with respect to said first and second arms and disposed intermediate said first and second clamping surfaces and said mounting means, said severing mechanism at least partially movable relative to said first and second arms solely in response to closure of said first and second arms about an umbilical cord to sever the cord between said first and second clamping surfaces and said clip;

b) said umbilical cord clip having;

i) a first leg having a first clamping surface;

ii) a second leg having a second clamping surface, said second leg movably affixed to said first leg;

iii) lock means associated with said first and second legs for maintaining said first and second legs in a closed position about an umbilical cord; and

iv) attachment means positioned on at least one of said first and second legs, said attachment means releasably engagable with said mounting means to hold said umbilical cord clip on said applicator.

14. An applicator and umbilical core clip for clamping an umbilical cord, applying an umbilical cord clip to the umbilical cord and severing the cord intermediate the clamped and clipped sides of the umbilical cord, comprising:

a) an applicator having;

i) a first arm having a first clamping surface;

ii) a second arm movably affixed to said first arm and having a second clamping surface;

iii) means positioned on at least one of said first and second arms for mounting at least one umbilical cord clip thereon;

iv) a recessed severing mechanism mounted for movement with respect to said first and second arms and disposed intermediate said first and second clamping surfaces and said mounting means, said severing mechanism at least partially movable relative to said first and second arms by closure of said first and second arms about an umbilical cord to sever the cord between said first and second clamping surfaces and said clip,

b) said umbilical cord clip having;

i) a first leg having a first clamping surface;

ii) a second leg having a second clamping surface, said second leg movably affixed to said first leg;

iii) lock means associated with said first and second legs for maintaining said first and second legs in a closed position about an umbilical cord; and

iv) attachment means associated with at least one of said first and second legs, said attachment means releasably engagable with said mounting means to hold said umbilical cord clip on said applicator;

said severing mechanism including

A) a deflectable knife member movably mounted with respect to said first arm; and

B) a projection mounted on said second arm and extending towards said first arm, wherein closure of said first and second arms about the umbilical cord causes said projection to deflect said knife member away from said first arm and towards said second arm to sever the umbilical cord captured between said first and second arms and said clip.

15. The applicator and umbilical cord clip as recited in claim 14, wherein said first and second legs are connected by a living hinge portion, said living hinge portion biasing said first and second legs apart in an unclamped position.

16. The applicator and umbilical cord clip as recited in claim 14, wherein said first and second clamping surfaces of said first and second legs are ridged to enhance grasping the umbilical cord.

17. The applicator and umbilical cord clip as recited in claim 14, wherein at least one of said first and second legs are hollowed beneath said clamping surfaces to provide a degree of flexibility to said clamping surfaces to prevent crushing of the umbilical cord upon clamping.

18. The applicator and umbilical cord clip as recited in claim 14, wherein said lock means includes;

a) a lock tab projecting from a distal end of said second leg, said lock tab having a relatively straight portion extending downward toward said first leg and a hook portion formed on an end of said straight portion, said hook portion extending proximally substantially perpendicular to said straight portion, said hook portion terminating in a lip portion extending upwardly towards said second leg substantially parallel to said straight portion;

b) a lock catch projecting distally from a distal end of said first leg and defining a recess for acceptance of said hook portion in said closed position, said lock catch having a pair of transversely spaced distally facing projections defining a channel therebetween to guide said hook portion into engagement with said recess of said lock catch.

19. An applicator for applying a first umbilical cord clip to a maternal side of the cord, applying a second umbilical cord clip to the fetal side of the cord and severing the cord intermediate the clipped maternal and fetal sides of the cord, said applicator comprising:

a) a first arm;

b) a second arm flexibly affixed to said first arm;

c) first means positioned on at least one of said first and second arms for mounting a first umbilical cord clip thereon;

d) second means positioned on at least one of said first and second arms for mounting a second umbilical cord clip thereon; and

e) a severing mechanism operatively associated with said first and second arms and disposed intermediate said first and second mounting means, said severing mechanism at least partially moveable relative to said first and second arms and actuable solely in response to closure of said first and second arms about an umbilical cord to sever the cord between the first and second umbilical cord clips.

20. The applicator as recited in claim 19, wherein said severing mechanism includes:

a) a deflectable knife member movably mounted with respect to said first arm; and

b) a projection mounted on said second arm and extending towards said first arm, wherein closure of said first and second arms about the umbilical cord causes said projection to deflect said knife member away from said first arm and towards said second arm to sever the umbilical cord captured between said first and second clips.

21. The applicator as recited in claim 19, wherein at least one of said first and second mounting means includes a pair of longitudinal spaced pins, said pins projecting transversely from at least one of said arms and are configured for engagement with corresponding mounting means on at least one of the first and second umbilical cord clips.

22. The applicator as recited in claim 21, wherein at least one pin of said pair of pins is cylindrical.

23. The applicator as recited in claim 21, wherein at least one pin of said pair of pins is conical.