Method for guide-wire placement and novel syringe therefor

• US 4,274,408 A
• Filed: 03/26/1979
• Issued: 06/23/1981
• Est. Priority Date: 03/26/1979
• Status: Expired due to Term

• Current Assignee: Beatrice Nimrod
• Original Assignee: Beatrice Nimrod
• Inventors: Nimrod, Beatrice
• Primary Examiner(s): ROSENBAUM, C FRED
• Application Number:
  US06/023,644
• Time in Patent Office: 820 Days
• Field of Search: 128/214 R, 128/214.4, 128/215, 128/220, 128/218 R, 128/218 P, 128/218 PA, 128/218 G, 128/218 M, 128/221, 128/234, 128/237, 128/348-349 , 128/DIG. 16, 128/9, 128/772
• US Class Current: 604/165.02
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
• CPC Class Codes: A61M 25/0111 Aseptic insertion devices
• CPC Class Codes: A61M 25/09041 Mechanisms for insertion of guide wires

Abstract

A syringe-type device for inserting a catheter guide wire into a blood vessel includes a syringe in which the plunger has a central passage extending through it. A thin feeder tube fits slidably in the central passage of the plunger and is itself provided with a central passage. The plunger passage is normally blocked by a closure means consisting of a ball bearing received in a seat provided by a rubber tip on inner edge of the plunger body. The needle is inserted into the blood vessel and the plunger is then withdrawn somewhat to permit blood to be observed in the body of the syringe for verification of proper needle positioning. The feeder tube is then slid through the central passage past the closure means to eject the ball bearing and thereby open the plunger passage. The feeder tube is further advanced to bring its inner end into contact with the end wall of the syringe body. In this position, the central passage of the feeder tube is aligned and in communication with the needle lumen, and the catheter guide wire may then be fed into the blood vessel by sliding it through the central passage of the feeder tube and the needle lumen. The device is then completely removed from the guide wire, and a beveled catheter is inserted over the guide wire in the usual manner.

Claims

1. A syringe device for inserting a catheter guide wire comprising:

a. a hollow body member providing a cavity therewithin and an end wall at one end thereof providing a hub portion and having an opening extending therethrough;

b. a needle on said hub portion and extending therefrom, said needle having a needle lumen extending therethrough and aligned with said opening in said end wall for communication of said lumen with said cavity;

c. a plunger extending through an opening in the opposite end of said body member and slidably received in said cavity, the peripheral surface of said plunger being in sliding and sealing engagement with a cooperating peripheral surface of said body member, said plunger having a plunger passage extending therethrough in alignment with said opening in said one end wall;

d. a feeder tube slidably received in said plunger passage, extending outwardly of said plunger, having inner and outer ends, and having a feeder passage extending from said outer end through said feeder tube to said inner end; and

e. closure means normally sealing said plunger passage on the needle side of said feeder tube but permitting said feeder tube to pass therethrough upon application of force to said feeder tube in the direction of said needle, and thereby against said closure means, said inner end of said feeder tube thereby being slidable to a position adjacent said hub for communication of said feeder passage with said needle lumen to guide a catheter guide wire introduced through said outer end of said feeder tube into said needle lumen.

2. The syringe device of claim 1 wherein said closure means includes a diaphragm extending across said plunger passage to seal it but permitting the passage therethrough of said feeder tube upon the application of force to said feeder tube in the direction of said needle and thereby against said diaphragm.

3. The syringe device of claim 2 wherein said diaphragm is a slotted diaphragm.

4. The syringe device of claim 2 wherein said diaphragm is a frangible diaphragm.

5. A syringe device for inserting a catheter guide wire comprising:

a. a hollow body member providing a cavity therewithin and an end wall at one end thereof providing a hub portion and having an opening extending therethrough, said body member also having an opening in the opposite end thereof providing communication with said cavity;

b. a needle on said hub portion and extending therefrom, said needle having a needle lumen extending therethrough and aligned with said opening in said end wall for communication of said lumen with said cavity;

c. a plunger extending through said opening in the opposite end of said body member and slidably received in said cavity, the peripheral surface of said plunger being in sliding and sealing engagement with a cooperating peripheral surface of said body member, said plunger having a plunger passage extending therethrough in alignment with said opening in said one end wall, said plunger including a seat portion of said plunger having a seat region of said plunger passage extending therethrough and bounded by an internal seat surface of said seat portion;

d. a feeder tube slidably received in said plunger passage, extending outwardly of said plunger, and having a feeder passage therethrough; and

e. substantially spherical member lodged in said seat region of said plunger passage, said seat portion of said plunger snugly holding said spherical member by sealing engagement of said seat surface therewith but permitting ejection thereof from said passage by the sliding of said feeder tube through said seat portion of said plunger passage, the inner end of said feeder tube thereby being slidable to a position adjacent said hub for communication of said feeder passage with said needle lumen to guide a catheter guide wire introduced through the outer end of said feeder tube into said needle lumen.

6. The syringe device of claim 5 wherein said plunger includes a body member and a separate tip member on the inner end thereof, said seat portion of said plunger including said tip member, said tip member having said seat region of said plunger passage extending therethrough and providing said seat surface internally thereof.

7. The syringe device of claim 6 or 5 wherein said feeder tube has a slot therein extending into said passage and a generally U-shaped clip with one leg thereof seated in said slot to extend through said feeder passage transversely thereof, said clip being adapted for restraining a guide wire contained in said feeder passage.

8. A syringe device for inserting a catheter guide wire comprising:

a. a hollow body member providing a cavity therewithin and an end wall at one end thereof providing a hub portion and having an opening extending therethrough, said body member also having an opening in the opposite end thereof providing communication with said cavity;

b. a needle on said hub portion and extending therefrom, said needle having a needle lumen extending therethrough and aligned with said opening in said end wall for communication of said lumen with said cavity;

c. a plunger extending through said opening in the opposite end of said body member and slidably received in said cavity, the peripheral surface of said plunger being in sliding and sealing engagement with a cooperating peripheral surface of said body member, said plunger having a plunger passage extending therethrough in alignment with said opening in said one end wall;

d. a feeder tube slidably received in said plunger passage, extending outwardly of said plunger, and having a feeder passage therethrough and a slot therein extending into said passage;

e. a generally U-shaped clip with one leg thereof seated in said slot in said feeder tube to extend through said feeder passage transversely thereof, said clip being adapted for restraining a guide wire contained in said feeder passage; and

f. closure means normally sealing said plunger passage on the needle side of said feeder tube but permitting said feeder tube to pass therethrough upon application of force to said feeder tube in the direction of said needle, and thereby against said closure means, the inner end of said feeder tube thereby being slidable to a position adjacent said hub for communication of said feeder passage with said needle lumen to guide a catheter guide wire introduced through the outer end of said feeder tube into said needle lumen.

9. The syringe device of claim 8 wherein said closure means includes a diaphragm extending across said plunger passage to seal it but permitting the passage therethrough of said feeder tube upon the application of force to said feeder tube in the direction of said needle and thereby against said diaphragm.

10. The syringe device of claim 9 wherein said diaphragm is a slotted diaphragm.

11. The syringe device of claim 9 wherein said diaphragm is a frangible diaphragm.