US4657020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of using a foreign object protector hood
Assignee: JAYCO PHARMACEUTICALS
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Filing: 1985-07-10
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Granted: 1987-04-14
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Expires: 2005-07-10
Abstract
Abstract This invention relates to a small bell-shaped latex rubber protector that is designed to be placed over the top of, e.g., an endoscope prior to its passage into a body cavity through a tract thereof. Once it is passed in a folded back position, a sharp, pointed or cutting foreign object can be retrieved from the cavity using a forceps or other accessory. The protector hood is then flipped into the open position by pulling the instrument back through, e.g., the lower esophageal narrowing. The bell-shaped latex protects, for example, the esophagus and posterior pharynx from the foreign body during its removal.
Inventors
- 👤 Lester J. Lifton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:54
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/50; A61B17/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
A method of removing a foreign object from an internal track of a body, such as a human body, without damaging the wall defining the track, the method comprising the steps of: inserting a probe into the track in a first direction with an inverted bell-shaped, flexible shield fixed thereto, the bell-shaped shield having an opening facing opposite the first direction and having a peripheral edge engaging the wall of the track; grasping the object with a tool extending from the probe; inverting the bell-shaped shield to cover the now grasped object by moving the probe in a second longitudinal direction opposite the first direction with the peripheral edge of the shield in engagement with the wall of the track, and removing the object from the track while preventing engagement of the object therewith by continuing longitudinal motion of the probe in the second direction.
Claim 2
Independent Claim
145 words
A method of removing a foreign object from an internal track of a body, such as a human body, without damaging the wall defining the track, the method comprising the steps of: inserting a probe into the track in a first direction with an inverted bell-shaped, flexible shield fixed thereto, the bell-shaped shield having an opening facing opposite the first direction and having a peripheral edge engaging the wall of the track; grasping the object with a tool extending from the probe; inverting the bell-shaped shield to cover the now grasped object by moving the probe in a second longitudinal direction opposite the first direction with the peripheral edge of the shield in engagement with the wall of the track, and removing the object from the track while preventing engagement of the object therewith by continuing longitudinal motion of the probe in the second direction.
Claim 3
Dependent Claim
25 words
The method of claim 1 further including the step of constricting the edge of the shield to completely enclose the foreign object within the shield.
Claim 4
Independent Claim
155 words
A method of removing a foreign object from an internal track of a body, such as a human body, by using an endoscope, catheter, grasping tool and flexible shield, the method comprising the steps of: folding the flexible shield, which is bell-shaped with a free edge when expanded, into the catheter and over the grasping tool with the free edge thereof facing in a first direction; inserting the catheter with the flexible shield folded therein in to an accessory channel within the endoscope; inserting the endoscope through the body track and into proximity with the foreign object; removing the catheter to expand the flexible shield; grasping the foreign body with the grasping tool; enveloping the foreign body within the bell-shaped shield; and withdrawing the endoscope from the track along with the shield enveloping the foreign body to remove the foreign body from the track while preventing the foreign body from engaging the track during withdrawal.
Claim 5
Independent Claim
155 words
A method of removing a foreign object from an internal track of a body, such as a human body, by using an endoscope, catheter, grasping tool and flexible shield, the method comprising the steps of: folding the flexible shield, which is bell-shaped with a free edge when expanded, into the catheter and over the grasping tool with the free edge thereof facing in a first direction; inserting the catheter with the flexible shield folded therein in to an accessory channel within the endoscope; inserting the endoscope through the body track and into proximity with the foreign object; removing the catheter to expand the flexible shield; grasping the foreign body with the grasping tool; enveloping the foreign body within the bell-shaped shield; and withdrawing the endoscope from the track along with the shield enveloping the foreign body to remove the foreign body from the track while preventing the foreign body from engaging the track during withdrawal.
Claim 6
Dependent Claim
29 words
The method of claim 3 further including the step of constricting the free edge of the shield after enveloping the object to completely enclose the object within the shield.
Claim 7
Dependent Claim
32 words
The method of claim 14 wherein the step of constricting the free edge of the shield comprises pulling a draw string disposed around the free edge to substantially close the free edge.
References Cited (Backward Citations)
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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) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |