# US 9,039,646 B2 · Chronic access system for extracorporeal treatment of blood including a continuously wearable hemodialyzer

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,039,646 B2
- Document ID: US9039646B2
- Status: Granted
- Kind: B2
- Application number: 14/165,983
- Filed: 2014-01-28
- Published: 2014-07-10
- Granted: 2015-05-26
- Earliest claimed: 2006-12-19
- Applicants: Arnold J. Lande
- Inventors: Arnold J. Lande
- Web page: https://patentgrep.com/patent/US9039646B2

## CPC

- A61M 1/3661: {for haemodialysis}
- 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}
- A61M 1/155: {with treatment-fluid pumping means or components thereof}
- 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}
- A61M 1/1562: {Details of incorporated reservoirs}
- A61M 1/15632: {the filter being a dialyser}
- A61M 1/1565: {Details of valves}
- A61M 1/1566: {Means for adding solutions or substances to the treating fluid}
- A61M 1/16: with membranes
- A61M 1/1605: {Physical characteristics of the dialysate fluid}
- A61M 1/1696: {with dialysate regeneration}
- A61M 1/3622: {with a cassette forming partially or totally the blood circuit}
- A61M 1/36224: {with sensing means or components thereof}
- 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}
- A61M 1/362263: {Details of incorporated filters}
- A61M 1/362265: {Details of valves}
- A61M 1/362266: {Means for adding solutions or substances to the blood}
- A61M 1/3655: {Arterio-venous shunts or fistulae}
- A61M 1/3672: {Means preventing coagulation}
- A61M 1/3675: {Deactivation}
- A61M 1/36225: {with blood pumping means or components thereof}
- A61M 2205/123: with incorporated reservoirs
- A61M 2205/126: with incorporated membrane filters
- A61M 2205/128: with incorporated valves
- A61M 2205/3317: Electromagnetic, inductive or dielectric measuring means
- A61M 2205/3324: PH measuring means
- A61M 2205/8206: battery-operated
- A61M 2209/088: on the body
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## 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

### Claim 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.