Catheter

• US 8,105,259 B2
• Filed: 02/21/2006
• Issued: 01/31/2012
• Est. Priority Date: 02/22/2005
• Status: Expired due to Fees

• Current Assignee: Kaneka Corporation
• Original Assignee: Kaneka Corporation
• Inventors: Nishide, Takuji, Michishita, Ichiro
• Primary Examiner(s): DEAK, LESLIE R
• Application Number:
  US11/816,697
• Publication Number:
  US 20090287135A1
• Time in Patent Office: 2,170 Days
• Field of Search: 604/4.01, 604/5.01, 604/5.04, 604/6.09, 604/6.11, 604/507, 604/508, 604/8, 604/9
• US Class Current: 604/4.01
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0037 characterized by lumina being arranged side-by-side
• CPC Class Codes: A61M 2025/0039 characterized by lumina being arranged coaxially
• CPC Class Codes: A61M 2027/004 with at least a part of the circuit outside the body
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/0041 pre-formed, e.g. specially adapted to fit with the anatomy of body channels urethral catheters A61F2/04
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked

Abstract

The present invention provides a catheter for extraction that can efficiently extract blood flowing in coronary sinus from coronary artery through coronary vein and has the same operability as catheters used in conventional PCI. The present invention also provides a catheter for extracorporeal circulation that can lessen an introduction number of devices for blood access as little as possible and reduce further the burden to a patient, in addition to the same operability as the catheters used in the conventional PCI. The catheter for extraction is equipped with blood extracting lumen in an inside and equipped with a hub at a proximal end portion, and when a minimum sectional area to a circumferential direction of the blood extracting lumen is referred to as S1 and immersion side length is referred to as L1, an equivalent diameter D1 satisfies the formula defined by D1=(4×S1)/L1 and the equivalent diameter D1 is at 1.80 mm. The catheter for extracorporeal circulation also has blood extracting lumen extending from the distal end to the proximal end and blood return lumen extending from the proximal end of the catheter to a fixed length distal end.

Claims

1. A method of actuating a catheter for extracorporeal circulation, wherein the catheter has distal end and proximal end, the catheter has blood extracting lumen extending from the distal end to the proximal end and blood return lumen extending from the proximal end of the catheter to the fixed length distal end, the blood is extracted from the distal end of the blood extracting lumen arranged in the coronary sinus of patient'"'"'s heart and the blood is returned from the blood extracting lumen arranged in the body of a patient into the body of the patient.

2. The method of claim 1, further equipped with that when the minimum sectional area to the circumferential direction of the blood extracting lumen of the catheter for extracorporeal circulation is referred to as S1 and an immersion side length is referred to as L1, an equivalent diameter D1 satisfies the formula defined by D1=(4×

S1)/L1 and the equivalent diameter D1 is at least 1.80 mm, and when the minimum sectional area to the circumferential direction of the blood return lumen is referred to as S2 and the immersion side length is referred to as L2, an equivalent diameter D2 satisfies the formula defined by D2=(4×

S2)/L2 and the equivalent diameter D2 is at least 1.30 mm and at most 2.00 mm.