Chronic access system for extracorporeal treatment of blood including a continuously wearable hemodialyzer

• US 9,039,646 B2
• Filed: 01/28/2014
• Issued: 05/26/2015
• Est. Priority Date: 12/19/2006
• Status: Active Grant

• Current Assignee: Arnold J. Lande
• Original Assignee: Arnold J. Lande
• Inventors: Lande, Arnold J.
• Primary Examiner(s): DEAK, LESLIE R
• Application Number:
  US14/165,983
• Publication Number:
  US 20140194804A1
• Time in Patent Office: 483 Days
• Field of Search: 604/4.01, 604/5.01, 604/5.04, 604/6.09, 604/6.11, 604/6.06, 604/6.07, 604/27, 604/30
• US Class Current: 604/6.06
• CPC Class Codes: A61M 1/15 with a cassette forming partially or totally the flow circuit for the treating fluid, e.g. the dialysate fluid circuit or the treating gas circuit
• CPC Class Codes: A61M 1/155 with treatment-fluid pumping means or components thereof
• CPC Class Codes: A61M 1/1561 at least one cassette surface or portion thereof being flexible, e.g. the cassette having a rigid base portion with preformed channels and being covered with a foil
• CPC Class Codes: A61M 1/1562 Details of incorporated reservoirs
• CPC Class Codes: A61M 1/15632 the filter being a dialyser
• CPC Class Codes: A61M 1/1565 Details of valves
• CPC Class Codes: A61M 1/1566 Means for adding solutions or substances to the treating fluid
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1605 Physical characteristics of the dialysate fluid
• CPC Class Codes: A61M 1/1696 with dialysate regeneration
• CPC Class Codes: A61M 1/3622 with a cassette forming partially or totally the blood circuit
• CPC Class Codes: A61M 1/36224 with sensing means or components thereof
• CPC Class Codes: A61M 1/36225 with blood pumping means or components thereof
• CPC Class Codes: A61M 1/362261 at least one cassette surface or portion thereof being flexible, e.g. the cassette having a rigid base portion with preformed channels and being covered with a foil
• CPC Class Codes: A61M 1/362263 Details of incorporated filters
• CPC Class Codes: A61M 1/362265 Details of valves
• CPC Class Codes: A61M 1/362266 Means for adding solutions or substances to the blood
• CPC Class Codes: A61M 1/3655 Arterio-venous shunts or fistulae
• CPC Class Codes: A61M 1/3661 for haemodialysis
• CPC Class Codes: A61M 1/3672 Means preventing coagulation
• CPC Class Codes: A61M 1/3675 : Deactivation
• CPC Class Codes: A61M 2205/123 : with incorporated reservoirs
• CPC Class Codes: A61M 2205/126 : with incorporated membrane filters
• CPC Class Codes: A61M 2205/128 : with incorporated valves
• CPC Class Codes: A61M 2205/3317 : Electromagnetic, inductive or dielectric measuring means
• CPC Class Codes: A61M 2205/3324 : PH measuring means
• CPC Class Codes: A61M 2205/8206 : battery-operated
• CPC Class Codes: A61M 2209/088 : on the body

Abstract

A patient wearable, continuously operating extracorporeal pump apparatus which accesses the patient'"'"'s arterial venous pressure differential by applying external pressure to a subcutaneous graft that has been cannualized to modulate blood flow through an extracorporeal circuit and to drive the pump for delivering a medicament, such as an anticoagulant, to the site of an intravenous cannula to prevent clogging thereof and also to move a dialysate through a circuit, including a dialyzer and a dialysate rejuvenating cartridge, whereby kidney failure can be treated without recourse to prior art hemodialysis machines found in most treatment facilities. With slight modification, the present invention can be used to remove excess fluids from CHF patients, to remove toxins from the blood in those suffering from liver failure and to facilitate administration of insulin to diabetics and/or glucose to those having hypoglycemia.

Claims

1. A method for obtaining access to a patient'"'"'s arteriovenous pressure differential for extracorporeal blood flow comprising the steps of:

(a) selecting a venous segment in the patient'"'"'s forearm and transecting and occluding the distal end thereof;

(b) anastomosing a remaining end portion of the transected vein to a selected artery in the patient'"'"'s forearm, creating a fistula;

(c) debranching the selected venous segment;

(d) inserting a first needle cannula percutaneously into the debranched vein segment for accessing AV pressure differential and extracorporeal blood flow and inserting a second needle cannula percutaneously into the debranched vein for return of the extracorporeal blood flow to the patient'"'"'s circulation; and

(e) sequentially applying and removing compression to the forearm between the first and second needle cannulae sufficient to substantially occlude blood flow through the debranched vein segment during the compression and thereby establishing the pressure differential in that when the compression is being applied, the first needle cannula is exposed to arterial pressure and when released, the first and second needle cannulae are exposed to venous pressure.