Patent US3184742A successfully refreshed from Google Patents.
US3598119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous paracervical anesthesia method and device
Assignee: Individual
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Filing: 1970-02-02
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Granted: 1971-08-10
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Expires: 1990-02-02
Abstract
Abstract A medical instrument and method for use in obstetrical or gynecological analgesic procedures to allow the administration of a paracervical block continuously or intermittently with only a single placement. The device has improved retention means, in the form of an inflatable bladder, which minimizes the trauma of insertion and withdrawal while positively assuring retention once the device is inserted in place.
Inventors
- 👤 Charles A White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:45
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/0069; A61M25/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
A device for administering a fluid agent into body tissue through an opening in the body, said device comprising a longitudinally extending hollow tube having a distal end and a proximal end, said distal end being open, means at the distal end for puncturing the said tissue, said means for puncturing the tissue including an elongated needle longitudinally movable within said tube, said needle being extendible through the opening in said distal end, an expandable member surrounding said tube near said distal end, means for selectively expanding and contracting said expandable member, and means for introducing the fluid agent into said tube for discharge through the opening in said distal end.
Claim 2
Independent Claim
111 words
A device for administering a fluid agent into body tissue through an opening in the body, said device comprising a longitudinally extending hollow tube having a distal end and a proximal end, said distal end being open, means at the distal end for puncturing the said tissue, said means for puncturing the tissue including an elongated needle longitudinally movable within said tube, said needle being extendible through the opening in said distal end, an expandable member surrounding said tube near said distal end, means for selectively expanding and contracting said expandable member, and means for introducing the fluid agent into said tube for discharge through the opening in said distal end.
Claim 3
Dependent Claim
20 words
The device of claim 1 in which the means for introducing the fluid agent into the tube includes said needle.
Claim 4
Dependent Claim
57 words
The device of claim 1 in which said means for selectively expanding and contracting said expandable member includes an inner hollow tube contained within said first mentioned hollow tube and forming an annular space therebetween, said first hollow tube having at least one opening therein to provide for communication between said annular space and said expandable member.
Claim 5
Dependent Claim
35 words
The device of claim 3 in which said means for puncturing the said tissue includes an elongated needle longitudinally movable within said inner tube, said needle being extendible through the opening in said distal end.
Claim 6
Dependent Claim
17 words
The device of claim 4 in which said means for introducing the fluid agent includes said needle.
Claim 7
Dependent Claim
43 words
The device of claim 4 in which the annular space formed between said first hollow tube and said inner tube is sealed at the distal and proximal ends, and means is provided to connect said annular space to a source of fluid supply.
Claim 8
Dependent Claim
54 words
The device of claim 4 in which said inner tube extends beyond the proximal end of said first hollow tube, and said needle is of a length slightly longer than the length of said inner tube so that said needle will protrude slightly from said distal end when fully advanced in said inner tube.
Claim 9
Independent Claim
107 words
A method for administering a fluid agent into body tissue through an opening in the body, said method comprising the steps of inserting a hollow tubular member through said body opening until the end thereof is placed against the tissue into which the agent is to be injected; puncturing the tissue at the placement site; inserting the device a limited distance into the tissue through said puncture; expanding the size of said device at a point within the tissue; injecting the agent through said device into said tissue; contracting the expanded portion of said Device; and withdrawing said device from said tissue and through said body opening.
Claim 10
Independent Claim
107 words
A method for administering a fluid agent into body tissue through an opening in the body, said method comprising the steps of inserting a hollow tubular member through said body opening until the end thereof is placed against the tissue into which the agent is to be injected; puncturing the tissue at the placement site; inserting the device a limited distance into the tissue through said puncture; expanding the size of said device at a point within the tissue; injecting the agent through said device into said tissue; contracting the expanded portion of said Device; and withdrawing said device from said tissue and through said body opening.
Claim 11
Dependent Claim
30 words
The method of claim 8 in which said device is left in place over a period of time and said agent is continuously injected through said device into said tissue.
Claim 12
Dependent Claim
32 words
The method of claim 8 in which said device is left in place over a period of time, and said agent is intermittantly and repeatedly injected through said device into said tissue.
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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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |