Patent US3831585A successfully refreshed from Google Patents.
US3831585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrograde renal biopsy device
Assignee: Individual
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Filing: 1972-07-19
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Granted: 1974-08-27
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Expires: 1992-07-19
Abstract
Abstract A medical instrument for use in renal biopsy is in the form of an injector tube having a puncturing and scraping tool secured to the end of an inner slide wire and a balloon surrounding the injector tube at the distal end thereof. A second flexible tube is mounted along the outside of the injector tube and connects to the balloon for inflation thereof in the renal pelvis to hold the distal end of the injector tube in fixed relation to the kidney to permit penetration of the scraping tool into the kidney tissue through the epithelium of the renal pelvis.
Inventors
- 👤 A Cole
- 👤 T Brondy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:21
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/04; A61B17/00; A61B17/12; A61B17/12022; A61B17/12099; A61B17/12131; A61B17/12136; A61M; A61M25/00; A61M25/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
215 words
A biopsy instrument for obtaining a sample of kidney tissue, comprising an elongated flexible insertion tube for insertion through the urethra, the bladder and the ureter into the renal pelvis of the kidney, a flexible slide wire slidably disposed in said insertion tube and extending from both ends thereof, a tissue removal tool fixedly secured to the foreward end portion of said slide wire, said tool having a scraping edge for insertion into the tissue of said kidney and for removing therefrom a tissue sample, an inflatable resilient balloon affixed to and surrounding the foreward end of said insertion tube in proximity to said tool so as to be positionable within the renal pelvis of said kidney and, when inflated to hold the foreward end of said insertion tube in a substantially fixed position in the renal pelvis, and a passageway extending from the interior of said balloon to the rearward portion of said instrument for use in inflating said balloon after it is positioned within said renal pelvis, whereby the inflated balloon holds the foreward end of said insertion tube in a substantially fixed position within said renal pelvis to permit the physician to cause said tool to penetrate the epithelium by pushing the rearward end of said slide wire into said insertion tube.
Claim 2
Dependent Claim
215 words
A biopsy instrument for obtaining a sample of kidney tissue, comprising an elongated flexible insertion tube for insertion through the urethra, the bladder and the ureter into the renal pelvis of the kidney, a flexible slide wire slidably disposed in said insertion tube and extending from both ends thereof, a tissue removal tool fixedly secured to the foreward end portion of said slide wire, said tool having a scraping edge for insertion into the tissue of said kidney and for removing therefrom a tissue sample, an inflatable resilient balloon affixed to and surrounding the foreward end of said insertion tube in proximity to said tool so as to be positionable within the renal pelvis of said kidney and, when inflated to hold the foreward end of said insertion tube in a substantially fixed position in the renal pelvis, and a passageway extending from the interior of said balloon to the rearward portion of said instrument for use in inflating said balloon after it is positioned within said renal pelvis, whereby the inflated balloon holds the foreward end of said insertion tube in a substantially fixed position within said renal pelvis to permit the physician to cause said tool to penetrate the epithelium by pushing the rearward end of said slide wire into said insertion tube.
Claim 3
Dependent Claim
19 words
A biopsy instrument according to claim 1 wherein said balloon is a tubular, resilient member surrounding said insertion tube.
Claim 4
Dependent Claim
24 words
A biopsy instrument according to claim 2 wherein said tool comprises a rearwardly extending finger for scraping tissue from an organ to be examined.
Claim 5
Dependent Claim
12 words
A biopsy instrument according to claim 3 wherein said finger is resilient.
Claim 6
Dependent Claim
24 words
A biopsy instrument according to claim 3 wherein said tool comprises a collar from which said finger and at least one additional finger extend.
Claim 7
Dependent Claim
50 words
A biopsy instrument according to claim 1 wherein said tool further comprises a tubular member through which said slide wire slidably extends, and stop means mounted on said tubular member and on said slide wire for limiting forward and rearward movement of said slide wire relative to said tubular member.
Claim 8
Dependent Claim
16 words
A biopsy instrument according to claim 6 wherein said finger is integral with said tubular member.
Claim 9
Dependent Claim
21 words
A biopsy instrument according to claim 7 wherein said tubular member is provided with a slot through which said finger extends.
Claim 10
Dependent Claim
29 words
A biopsy instrument according to claim 1 wherein said tool comprises a rearwardly extending tissue removal and collection finger on the end of which said scraping edge is provided.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |