US4871356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter device
Assignee: B Braun Melsungen AG
•
Filing: 1988-05-17
•
Granted: 1989-10-03
•
Expires: 2008-05-17
Abstract
Abstract A retentive catheter having a cannula tube through which medications may be injected into a patient. A mandrin may be left in the retentive catheter during the injection. The medication is injected through an injection port and flows through a fluid channel between the mandrin and the cannula tube and is discharged from the cannula tube through a valve. The valve may be of the nonreturn type. The mandril tip prevents blood components from entering into the cannula tube. The protection against contamination is increased because the mandrin need not be removed from a proposed injection.
Inventors
- 👤 Hans Haindl
- 👤 Jurgen Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:59
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0074; A61M25/0075
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
114 words
A catheter device comprising: a retentive catheter including a cannula tube having a first end and a second end, a connecting means including a lateral injection port adjacent the first end of the cannula tube, a mandrin insertable through the connector into the catheter for blocking blood inflow into the second end of the cannula tube, said mandrin sealingly secured to said connector means, the mandrin and the cannula tube being mutually configured to define therebetween a substantially longitudinal fluid channel extending substantially between the injection port and the second end of the cannula tube, and a valve formed by the mandrin and the cannula tube adjacent the second end of the cannula tube.
Claim 2
Dependent Claim
114 words
A catheter device comprising: a retentive catheter including a cannula tube having a first end and a second end, a connecting means including a lateral injection port adjacent the first end of the cannula tube, a mandrin insertable through the connector into the catheter for blocking blood inflow into the second end of the cannula tube, said mandrin sealingly secured to said connector means, the mandrin and the cannula tube being mutually configured to define therebetween a substantially longitudinal fluid channel extending substantially between the injection port and the second end of the cannula tube, and a valve formed by the mandrin and the cannula tube adjacent the second end of the cannula tube.
Claim 3
Dependent Claim
115 words
A catheter device comprising: a retentive catheter including a cannula tube having a first end and a second end, a connector means including a lateral injection port adjacent the first end of the cannula tube, a mandrin insertable through the connector into the catheter for blocking blood inflow into the second end of the cannula tube, said mandrin sealingly secured to said connector means, the mandrin being configured to define therein a substantially longitudinal fluid channel extending substantially between the injection part and the second end of the cannula tube, and a non-return valve provided in the mandrin adjacent the second end of the cannula tube, the valve being openable upon overpressure within the mandrin.
Claim 4
Dependent Claim
115 words
A catheter device comprising: a retentive catheter including a cannula tube having a first end and a second end, a connector means including a lateral injection port adjacent the first end of the cannula tube, a mandrin insertable through the connector into the catheter for blocking blood inflow into the second end of the cannula tube, said mandrin sealingly secured to said connector means, the mandrin being configured to define therein a substantially longitudinal fluid channel extending substantially between the injection part and the second end of the cannula tube, and a non-return valve provided in the mandrin adjacent the second end of the cannula tube, the valve being openable upon overpressure within the mandrin.
Claim 5
Dependent Claim
31 words
A catheter device as defined in claim 1 or 2 further comprising displacement means for longitudinally displacing the mandrin relative to the cannula tube to thereby open and close the valve.
Claim 6
Dependent Claim
43 words
A catheter device as defined in claim 3 wherein the displacement means comprises threaded engagement means provided between the mandrin and the connector for translating relative rotation between the mandrin and the connector into longitudinal displacement of the mandrin relative to the cannula.
Claim 7
Dependent Claim
30 words
A catheter device as defined in claim 3, further comprising an axially flexible, resilient biasing means joining the mandrin and the connector for biasing the valve in a closed position.
Claim 8
Dependent Claim
141 words
A catheter device comprising: a catheter including a cannula tube having a first end and a second end, a connector means including a lateral injection port adjacent the first end of the cannula tube, a mandrin insertable through the connector into the catheter for blocking blood inflow into the second end of the cannula tube, said mandrin sealingly secured to said connector means, the mandrin and the cannula tube being mutually configured to define therebetween a substantially longitudinal fluid channel extending substantially between the injection port and the second end of the cannula tube, and a valve formed by the mandrin and the cannula tube adjacent the second end of the cannula tube adjacent the second end of the cannula tube, wherein the valve is a nonreturn valve which is opened in the case of overpressure in the longitudinal fluid channel.
Claim 9
Dependent Claim
141 words
A catheter device comprising: a catheter including a cannula tube having a first end and a second end, a connector means including a lateral injection port adjacent the first end of the cannula tube, a mandrin insertable through the connector into the catheter for blocking blood inflow into the second end of the cannula tube, said mandrin sealingly secured to said connector means, the mandrin and the cannula tube being mutually configured to define therebetween a substantially longitudinal fluid channel extending substantially between the injection port and the second end of the cannula tube, and a valve formed by the mandrin and the cannula tube adjacent the second end of the cannula tube adjacent the second end of the cannula tube, wherein the valve is a nonreturn valve which is opened in the case of overpressure in the longitudinal fluid channel.
Claim 10
Dependent Claim
27 words
A catheter device as defined in claim 6, wherein the nonreturn valve comprises a flexibly expandable constricted portion of the cannula tube configured to embrace the mandrin.
Claim 11
Dependent Claim
48 words
A catheter device as defined in claim 6, wherein the nonreturn valve comprises: a headpiece, disposed adjacent one end of the mandrin, the headpiece having a cross section greater than that of the mandrin, and a flexibly expandable portion of the cannula tube configured to embrace the headpiece.
Claim 12
Dependent Claim
47 words
A catheter device as defined in claim 6, wherein the nonreturn valve comprises: a headpiece provided adjacent one end of the mandrin for blocking the longitudinal fluid channel, and means for removing the headpiece from the cannula tube in case of overpressure in the longitudinal fluid channel.
Claim 13
Dependent Claim
52 words
A catheter device as defined in claim 8 or 9, wherein the mandrin includes a substantially round cross section defining an exterior diameter, the cannula tube defines an interior diameter, and at least a portion of the exterior diameter of the mandrin is smaller than the interior diameter of the cannula tube.
Claim 14
Dependent Claim
24 words
A catheter device as defined in claim 8 or 9, wherein the longitudinal fluid channel comprises at least one longitudinal groove in the mandrin.
Claim 15
Dependent Claim
36 words
A catheter device as defined in claim 9, wherein the mandrin comprises a helical coil forming a helical fluid channel, the helical coil being axially expandable in the case of overpressure in the longitudinal fluid channel.
References Cited (Backward Citations)
US396754A
Cited
US1926608A
Cited
US3802433A
Cited
DE3326648A1
Cited
US4759752A
Cited
US4666429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |