US3670729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfusion needles
Assignee: Individual
•
Filing: 1969-09-17
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Granted: 1972-06-20
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Expires: 1989-09-17
Abstract
Abstract A transfusion device for transfusing fluid intravenously without causing inflammation at the site of entry. The device comprises a body portion having a through bore and a secondary bore communicating with the through bore and a sleeve projecting from the body portion to form a continuation of the through bore, the wall of the sleeve being provided with a plurality of perforations. In one embodiment of the invention, the tip of the sleeve is restricted to receive and seal against the tube of a catheter which is insertable through the through bore in the body portion and the sleeve, a first fluid being transfused through the catheter and a second fluid being transfused through the secondary bore, via the annular passage formed between the catheter and the sleeve to the perforations in the wall of the sleeve. In another embodiment of the invention, an integral inner wall is provided within the sleeve, the inner wall being imperforate and forming a continuation of the through bore which serves as a flow passage for the first fluid.
Inventors
- 👤 Alan E C Bennett
- 👤 Michael Bewick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:49
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0606; A61M25/0021; A61M25/0023; A61M25/0026; A61M25/003; A61M2025/0031
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
A method of treating tissue in the area of entry of an intravenous transfusion needle comprising the steps of passing an anti-inflammatory fluid to the site of entry simultaneously with but separate from a transfusion medium, releasing the transfusion medium into the patient''s vein downstream of the site of entry, and releasing said antiinflammatory medium into the tissue at said site of entry.
Claim 2
Independent Claim
63 words
A method of treating tissue in the area of entry of an intravenous transfusion needle comprising the steps of passing an anti-inflammatory fluid to the site of entry simultaneously with but separate from a transfusion medium, releasing the transfusion medium into the patient''s vein downstream of the site of entry, and releasing said antiinflammatory medium into the tissue at said site of entry.
Claim 3
Dependent Claim
92 words
The method of claim 1, in which said transfusion needle includes a member having a through bore formed therein for passing said transfusion medium therethrough, a tubular sleeve projecting from one end of said member and forming a continuation of said through bore, and a secondary bore having an entry and an outlet end communicating with said through bore for passing said anti-inflammation fluid therethrough, and a plurality of apertures spaced along substantially the entire length of said sleeve in communication with said through bore and the outlet of said secondary bore.
Claim 4
Dependent Claim
22 words
The method of claim 1, wherein the internal diameter of said sleeve is reduced at or near the tip of said sleeve.
Claim 5
Dependent Claim
21 words
The method of claim 3, wherein the entry end of said through bore is shaped to receive a catheter end fitting.
Claim 6
Dependent Claim
20 words
The method of claim 4, wherein the entry end of said secondary bore is shaped to receive a luer fitting.
Claim 7
Dependent Claim
124 words
The method of claim 3, further comprises the steps of providing catheter having a flexible lumen and a catheter end fitting, and extending said lumen through said through bore so that it projects from the tip of said sleeve to form a first fluid passage, the catheter end fitting being attached to and sealed against said member and the reduced diameter portion of said sleeve to grip and seal against the lumen to space said lumen from the internal surface of the remainder of said sleeve and thereby provide an annular passage forming a second flow passage which communicates between said secondary bore in said member and the apertures in the wall of said sleeve, and which is sealed from said first flow passage.
Claim 8
Dependent Claim
105 words
The method of claim 1, wherein said sleeve is double walled and comprises an outer tubular wall formed with said apertures and an inner, imperforate tubular wall which projects beyond the tip of the outer wall and the bore of whiCh forms a first flow passage, wherein the annular passage formed between the inner and outer walls of said sleeve is closed at or adjacent the tip of the outer wall and forms a second flow passage which is sealed from the first flow passage and which communicates between the secondary bore in said member and said apertures in the outer wall of said sleeve.
Claim 9
Dependent Claim
28 words
The method of claim 7, wherein the outer end of said through bore and the outer end of said secondary bore are shaped to receive a luer fitting.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |