Method for dissolving a solidified mass in vivo, and apparatus for use in said method

• US 4,655,744 A
• Filed: 12/03/1985
• Issued: 04/07/1987
• Est. Priority Date: 09/06/1985
• Status: Expired due to Fees

• Current Assignee: Research Corporation A New York Non-Profit Corporation
• Original Assignee: Research Corporation
• Inventors: Caskey, Patrick E., Thistle, Johnson L.
• Primary Examiner(s): Pellegrino, Stephen C.
• Application Number:
  US06/804,219
• Time in Patent Office: 490 Days
• Field of Search: 604/151, 604/27, 604/28, 604/43, 604/49, 604/54, 604/56, 604/152, 604/276, 604/319
• US Class Current: 604/28
• CPC Class Codes: A61B 2017/22084 stone- or thrombus-dissolving
• CPC Class Codes: A61M 1/772 operating alternately

Abstract

A method for dissolving a solidified mass in vivo, and apparatus for oscillating a fluid into and out from a body area. The method comprises introducing a dissolving agent into a body area, and oscillating an agitating fluid into and out from that body area to stir the dissolving agent therein. Body fluids withdrawn from the body area with the agitating fluid are separated therefrom, and the separated agitating fluid is reintroduced into the body area to further stir the dissolving agent. The apparatus comprises a pump to force fluid into and to draw the fluid from a body area, a trap for collecting body fluids aspirated from the body area, and fluid lines to connect the pump to the trap and the trap to the body area.

Claims

1. A method for dissolving a solidified mass in vivo, comprising:

introducing a dissolving agent into a localized area of a patient'"'"'s body;

injecting an agitating fluid into and withdrawing the agitating fluid from the localized body area to stir the dissolving agent therein, wherein a body fluid is withdrawn from the body area with the agitating fluid;

separating the withdrawn body fluid from the withdrawn agitating fluid; and

reintroducing the separated agitating fluid into the localized body area to further stir the dissolving agent therein.

2. A method according to claim 1 wherein:

the separating step includes the steps of

(i) conducting the withdrawn body fluid and the withdrawn agitating fluid into a fluid trap,

(ii) collecting the withdrawn body fluid in a first region of the fluid trap, and

(iii) collecting the withdrawn agitating fluid in a second region of the fluid trap; and

the step of reintroducing the separated agitating fluid includes the step of conducting agitating fluid from the second region of the fluid trap back into the localized body area.

3. A method according to claim 2 wherein the separating step further includes the step of discharging body fluid from the fluid trap.

4. A method according to claim 3 wherein gases are drawn into the fluid trap, and the separating step further includes the step of venting gases from the fluid trap.

5. A method for dissolving a solidified mass in vivo, comprising:

introducing a dissolving agent into a localized area of a patient'"'"'s body;

oscillating an agitating fluid into and out of the localized body area to stir the dissolving agent therein, wherein bile is withdrawn from the body area with the agitating fluid;

separating the withdrawn bile from the withdrawn agitating fluid in a bile trap; and

recycling back into the body area agitating fluid separated from the bile to further stir the dissolving agent.

6. A method according to claim 5 wherein the separating step includes the steps of:

discharging bile from the bile trap; and

venting gases and vapors from the bile trap.

7. Apparatus for oscillating a fluid into and out from a localized body area, comprising:

a pump for forcing fluid into and drawing the fluid from the body area in a continuous, cyclical manner; and

fluid delivery means for connecting the pump to the body area to conduct the fluid therebetween, and including

(i) a fluid trap for collecting body fluid aspirated from the body area, and including means for discharging body fluid from the fluid trap,

(ii) a first fluid line for connecting the pump to the fluid trap to conduct fluid therebetween, and

(iii) a second fluid line for connecting the fluid trap to the body area, with the fluid trap located in series between the pump and the body area, to conduct fluid between the fluid trap and the body area.

8. Apparatus according to claim 7 wherein the discharging means includes:

a body fluid outlet formed in a top of the fluid trap; and

a body fluid discharge tube extending downward from the body fluid outlet, into a lower portion of the fluid trap.

9. Apparatus according to claim 7 wherein the fluid trap further includes gas discharge means to vent from the fluid trap gases and vapors that collect therein.

10. Apparatus according to claim 7 wherein:

the fluid trap includes a liquid container and a cover extending over the container; and

the cover forms an inlet for receiving the first fluid line and an outlet for receiving the second fluid line.

11. Apparatus according to claim 10 wherein:

the cover further forms a body fluid outlet and a gas vent;

the means for a discharging body fluid from the fluid trap includes a body fluid discharge tube extending downward from the body fluid outlet, into the liquid container to conduct body fluid therefrom and through the body fluid outlet; and

the fluid trap further includes means normally closing the gas vent.

12. Apparatus for oscillating a fluid into and out from a localized body area comprising:

a pump to inject fluid into and aspirate fluid from the body area in a continuous, cyclical manner; and

fluid delivery means for connecting the pump to the body area to conduct fluid therebetween, and including

(i) a fluid trap to collect body fluid aspirated from the body area, and including (a) an inlet, (b) an outlet, (c) body fluid discharge means to discharge body fluid from the fluid trap, and (d) gas discharge means to vent gases and vapors from the fluid trap,

(ii) a first fluid line connected to the pump and secured to the inlet of the fluid trap to conduct fluid between the pump and the fluid trap, and

(iii) a second fluid line secured in the outlet of the fluid trap, for connecting the fluid trap to the body area, with the fluid trap located in series between the pump and the body area, to conduct fluid between the fluid trap and the body area.

13. Apparatus according to claim 12, wherein:

the fluid trap includes a liquid container, and a cover extending over the container; and

the body fluid discharge means includes

(i) a body fluid outlet formed in the cover, and

(ii) a body fluid discharge tube extending downward from the body fluid outlet, into the liquid container to conduct body fluid therefrom and through the body fluid outlet.

14. Apparatus according to claim 13, wherein the gas discharge means includes:

a gas vent formed in the cover; and

means normally closing the gas vent.