Patent US4292976A successfully refreshed from Google Patents.
US4292976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Right ventricular injection catheter; right ventricular angiographic method; and method of monitoring septal wall motion
Assignee: Individual
•
Filing: 1979-08-08
•
Granted: 1981-10-06
•
Expires: 1999-08-08
Abstract
Abstract A novel right ventricular injection catheter is disclosed having a balloon tip for disposition in a non-irritable portion of the pulmonary artery, and a distinct injection lumen terminating in a plurality of perforations located 6-8 centimeters from the tip through which materials may be injected into the right ventricle. Using this catheter, it has been found that premature ventricular beats may be avoided, thereby permitting the observation of normal intraventricular septal motion.
Inventors
- 👤 Vidya S. Banka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:47
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/48; A61B6/481; A61B6/50; A61B6/504; A61M; A61M25/00; A61M25/10; A61M5/00; A61M5/007
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
126 words
A method of right ventricular angiographic catheterization comprising the steps of: (a) providing a catheter of sufficient length for insertion through the right ventricle and into the pulmonary artery of a patient to be catheterized, said catheter having at least one lumen therein, and said lumen communicating with a plurality of injection orifices 4-10 cm from the tip of said catheter, so that the tip of said catheter when inserted into the pulmonary artery positions said orifices in the ventricle; (b) inserting said catheter, tip end first, through said right ventricle and into said pulmonary artery to a point where said injection orifices are located within said right ventricle; and (c) injecting a contrast medium through said catheter and out said orifices into said right ventricle.
Claim 2
Independent Claim
126 words
A method of right ventricular angiographic catheterization comprising the steps of: (a) providing a catheter of sufficient length for insertion through the right ventricle and into the pulmonary artery of a patient to be catheterized, said catheter having at least one lumen therein, and said lumen communicating with a plurality of injection orifices 4-10 cm from the tip of said catheter, so that the tip of said catheter when inserted into the pulmonary artery positions said orifices in the ventricle; (b) inserting said catheter, tip end first, through said right ventricle and into said pulmonary artery to a point where said injection orifices are located within said right ventricle; and (c) injecting a contrast medium through said catheter and out said orifices into said right ventricle.
Claim 3
Dependent Claim
28 words
A method as claimed in claim 1, further comprising the step of stabilizing said tip of said catheter within said pulmonary artery at least during said injecting step.
Claim 4
Dependent Claim
30 words
A method as claimed in claim 2, wherein said catheter has a balloon tip thereon, and wherein said stabilizing step comprises inflating said balloon during at least said injection step.
Claim 5
Independent Claim
156 words
A method of monitoring septal wall motion comprising the steps of: (a) providing a catheter of sufficient length for insertion through the right ventricle into the pulmonary artery of a patient to be catheterized, said catheter having at least one lumen, and said lumen communicating with injection orifices 4-10 cm from the tip of said catheter, so that the tip of said catheter when inserted into the pulmonary artery positions said orifices in the ventricle; (b) inserting said first catheter through said right ventricle and into said pulmonary artery of said patient to a point where said injection orifices are located within said right ventricle; (c) providing a second angiographic catheter; (d) inserting said second catheter into the left ventricle of the patient to be catheterized; and (e) simultaneously injecting contrast medium into said first and second catheters; whereby said right and left ventricles on either side of said septal wall are filled with contrast medium.
Claim 6
Independent Claim
156 words
A method of monitoring septal wall motion comprising the steps of: (a) providing a catheter of sufficient length for insertion through the right ventricle into the pulmonary artery of a patient to be catheterized, said catheter having at least one lumen, and said lumen communicating with injection orifices 4-10 cm from the tip of said catheter, so that the tip of said catheter when inserted into the pulmonary artery positions said orifices in the ventricle; (b) inserting said first catheter through said right ventricle and into said pulmonary artery of said patient to a point where said injection orifices are located within said right ventricle; (c) providing a second angiographic catheter; (d) inserting said second catheter into the left ventricle of the patient to be catheterized; and (e) simultaneously injecting contrast medium into said first and second catheters; whereby said right and left ventricles on either side of said septal wall are filled with contrast medium.
Claim 7
Dependent Claim
33 words
A method as claimed in claim 4, further comprising the step of making Cines for evaluating the contraction pattern of both said right and left ventricle chambers and said interventricular septal wall motion.
Claim 8
Dependent Claim
18 words
A method as claimed in claim 5, wherein said Cine is made using the left anterior oblique view.
Claim 9
Dependent Claim
39 words
A method as claimed in claim 6, wherein said contrast medium is simultaneously injected at a rate of 12-15 cc/second through said second catheter into said left ventricle and 8-12 cc/second through said first catheter into said right ventricle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |