Patent US5330433A successfully refreshed from Google Patents.
US5330433A
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US
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Bidirectional femoral arterial cannula
Assignee: Boston University
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Filing: 1992-09-18
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Granted: 1994-07-19
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Expires: 2012-09-18
Abstract
Abstract An arterial cannula which includes a diverting side hole which simultaneously perfuses blood to the body and the lower extremity. Two barbs on the cannula exterior position the diverting hole just inside the blood vessel and prevent the back wall of the blood vessel from blocking the diverting hole. A transparent flash chamber on the proximal end of the cannula provides a visual indication of the entrance of the diverting side hole into the blood vessel. When the diverting hole enters the blood vessel, blood immediately fills the flash chamber.
Inventors
- 👤 James D. Fonger
- 👤 Kenneth R. Jonkman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:02
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0606; A61M25/0067; A61M25/0068; A61M25/007; A61M25/0693
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A method of delivering blood through a cannula in a patient, the cannula having a proximal end, a distal end, and a diverting side hole, the method comprising the steps of: inserting the cannula in a blood vessel of the patient, the cannula being inserted until the diverting side hole enters the blood vessel; pumping blood through the proximal end of the cannula to the distal end of the cannula; and directing the blood continuously in a first direction through the distal end of the cannula and in a second direction opposite to the first direction through the diverting side hole of the cannula.
Claim 2
Independent Claim
104 words
A method of delivering blood through a cannula in a patient, the cannula having a proximal end, a distal end, and a diverting side hole, the method comprising the steps of: inserting the cannula in a blood vessel of the patient, the cannula being inserted until the diverting side hole enters the blood vessel; pumping blood through the proximal end of the cannula to the distal end of the cannula; and directing the blood continuously in a first direction through the distal end of the cannula and in a second direction opposite to the first direction through the diverting side hole of the cannula.
Claim 3
Dependent Claim
23 words
A method according to claim 1, wherein the blood being directed in the first direction is sent towards the heart of a patient.
Claim 4
Dependent Claim
24 words
A method according to claim 2, wherein the blood being directed in the second direction is sent towards the femoral artery of the patient.
Claim 5
Independent Claim
119 words
A method of using a bidirectional cannula in a patient, the bidirectional cannula having a proximal end, a distal end, and a diverting side hole, the method comprising the steps of: piercing the skin of the patient with a needle; inserting the bidirectional cannula through the pierced skin into a blood vessel; threading the bidirectional cannula until the diverting side hole enters the blood vessel; pumping blood through the proximal end of the bidirectional cannula to the distal end of the bidirectional cannula; and directing the blood continuously in a first direction through the distal end of the bidirectional cannula and in a second direction opposite to the first direction through the diverting side hole of the bidirectional cannula.
Claim 6
Independent Claim
119 words
A method of using a bidirectional cannula in a patient, the bidirectional cannula having a proximal end, a distal end, and a diverting side hole, the method comprising the steps of: piercing the skin of the patient with a needle; inserting the bidirectional cannula through the pierced skin into a blood vessel; threading the bidirectional cannula until the diverting side hole enters the blood vessel; pumping blood through the proximal end of the bidirectional cannula to the distal end of the bidirectional cannula; and directing the blood continuously in a first direction through the distal end of the bidirectional cannula and in a second direction opposite to the first direction through the diverting side hole of the bidirectional cannula.
Claim 7
Dependent Claim
26 words
A method according to claim 4, further comprising the step of indicating that the diverting side hole of the bidirectional cannula has entered the blood vessel.
Claim 8
Dependent Claim
18 words
A method according to claim 4, wherein a barb facilitates retention of the cannula in the blood vessel.
Claim 9
Dependent Claim
22 words
A method according to claim 4, wherein the step of inserting the bidirectional cannula into the blood vessel comprises using a guidewire.
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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) | 1997-07-18 | 1998-01-17 | 1998-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-18 | 2002-01-17 | 2002-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-18 | 2006-01-17 | 2006-07-19 | $7700.00 | Window Closed / Lapsed |