US4893635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for performing a biopsy
Assignee: DE GROOT WILLIAM J
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Filing: 1988-06-01
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Granted: 1990-01-16
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Expires: 2008-06-01
Abstract
Abstract A cell or tissue retrieving instrument is slidably mounted within the needle of a conventional "Skinny Needle" and is connected to the needle syringe piston. In use, the needle with the instrument enclosed therein is inserted inwardly into the patient's organ. The instrument is held fixed and the needle is moved outwardly to expose the instrument within the organ. The instrument retrieves cell or tissue from the organ while being pulled into the needle and the needle with the enclosed instrument is removed from the patient. A device is also disclosed for manipulating the "Skinny Needle" and tissue retrieving instrument in the method of performing the biopsy.
Inventors
- 👤 William J. de Groot
- 👤 Theodore J. de Groot
- 👤 Joseph B. de Groot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:02
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0266; A61B10/0275; A61M; A61M5/00; A61M5/178; A61M5/20; A61B2010/0208; A61B2010/0216; A61M5/46
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
175 words
Non-aspiration apparatus for obtaining cells in lung tissue while performing a percutaneous biopsy on a patient comprising, a relatively long thin cannula needle in the range of 18 to 21 gauge having an angled shape cutting tip, a cell retrieving instrument slidably mounted in said needle, a syringe assembly, said syringe assembly including a cylinder portion and a plunger portion slidably mounted in said cylinder portion, one end of said needle being connected to the syringe cylinder portion, and wire means connecting the cell retrieving instrument to the syringe plunger portion, whereby cells are obtained from the patient's lung by inserting the needle, with the cell retrieving instrument wholly contained therein, inwardly through the patient's chest into the lung, maintaining the cell retrieving instrument fixed while sliding the needle outwardly relative thereto, to thereby expose the cell retrieving instrument within the patient's lung, maintaining the needle fixed while sliding the cell retrieving instrument in an outward direction into the needle, and removing the needle, the wholly contained instrument and retrieved cell from the patient's lung.
Claim 2
Dependent Claim
175 words
Non-aspiration apparatus for obtaining cells in lung tissue while performing a percutaneous biopsy on a patient comprising, a relatively long thin cannula needle in the range of 18 to 21 gauge having an angled shape cutting tip, a cell retrieving instrument slidably mounted in said needle, a syringe assembly, said syringe assembly including a cylinder portion and a plunger portion slidably mounted in said cylinder portion, one end of said needle being connected to the syringe cylinder portion, and wire means connecting the cell retrieving instrument to the syringe plunger portion, whereby cells are obtained from the patient's lung by inserting the needle, with the cell retrieving instrument wholly contained therein, inwardly through the patient's chest into the lung, maintaining the cell retrieving instrument fixed while sliding the needle outwardly relative thereto, to thereby expose the cell retrieving instrument within the patient's lung, maintaining the needle fixed while sliding the cell retrieving instrument in an outward direction into the needle, and removing the needle, the wholly contained instrument and retrieved cell from the patient's lung.
Claim 3
Dependent Claim
14 words
Apparatus as defined in claim 1, wherein the cell retrieving instrument comprises a brush.
Claim 4
Dependent Claim
14 words
Apparatus as defined in claim 1, wherein the cell retrieving instrument comprises a needle.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |