# US 10,765,795 B2 · Method and apparatus for the dialysis of blood

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- Number: US 10,765,795 B2
- Document ID: US10765795B2
- Status: Granted
- Kind: B2
- Application number: 15/848,795
- Filed: 2017-12-20
- Published: 2018-06-28
- Granted: 2020-09-08
- Earliest claimed: 2011-08-11
- Assignees: Medical Components, Inc.
- Applicants: Medical Components, Inc.
- Inventors: Adrian Ravenscroft; Donald Woods
- Web page: https://patentgrep.com/patent/US10765795B2

## CPC

- A61M 1/3661: {for haemodialysis}
- A61M 1/3659: {Cannulae pertaining to extracorporeal circulation}
- A61M 25/0021: {characterised by the form of the tubing (A61M25/0054 takes precedence)}
- A61M 25/0026: {Multi-lumen catheters with stationary elements (catheter assemblies comprising a catheter in combination with a guide tube, sheath or sleeve A61M2025/0681; catheters comprising telescoping coaxial elements A61M2025/0175)}
- A61M 25/003: {characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves (catheter tips A61M25/0067)}
- A61M 25/0067: {characterised by the distal end, e.g. tips (A61M25/0054, A61M25/04 take precedence; balloon catheters A61M25/10)}
- A61M 25/007: {Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked}
- A61M 25/0071: {Multiple separate lumens (multiple separate lumens throughout the catheter A61M25/0026)}
- A61M 25/0194: {Tunnelling catheters}
- A61M 39/22: Valves or arrangement of valves {(A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405)}
- A61M 2025/0031: {characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment}
- A61M 2025/0037: {characterized by lumina being arranged side-by-side}
- A61M 2025/0073: {Tip designed for influencing the flow or the flow velocity of the fluid, e.g. inserts for twisted or vortex flow}
- A61M 2039/082: {Multi-lumen tubes}
- A61M 2039/226: {Spindles or actuating means}
- 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

Apparatus for use in dialyzing a patient comprising a hemodialysis catheter comprising an elongated body having a proximal and a distal end, wherein the distal end terminates in a substantially planar distal end surface; first and second lumens extending from the proximal end to the distal end, wherein the lumens terminate on the distal end surface in first and second mouths, arranged in side-by-side configuration, and further wherein the lumens are separated by a septum; and first and second longitudinal slots formed in the distal end of the elongated body and communicating with the interiors of the lumens, the slots opening on the distal end surface; wherein the slots each have a length and a width, relative to the dimensions of the lumens and the rate of blood flow to be passed through the hemodialysis catheter, so as to minimize undesirable recirculation of dialyzed blood.

## Claims

### Claim 1

A tunneling tool, comprising:
a shaft comprising a proximal end and a distal end, the shaft configured to advance a catheter under a skin of a patient;
a plurality of fingers extending from the shaft at or near the proximal end;
a sleeve slidably disposed on the shaft,
wherein each finger of the tunneling tool is configured to be received within at least one slot of a catheter, the catheter comprising an elongated body, a plurality of lumens, and the at least one slot formed in an outer wall at an end of the elongated body and communicating with a corresponding one of the lumens; and
sliding the sleeve over the plurality of fingers causes the plurality of fingers to grip the end of the elongated body of the catheter.

### Claim 2 (depends on 1)

The tunneling tool recited in claim 1, wherein the sleeve is configured to be slid along the shaft and over the plurality of fingers.

### Claim 3 (depends on 1)

The tunneling tool recited in claim 1, wherein the sleeve comprises a tapered configuration.

### Claim 4 (depends on 1)

The tunneling tool recited in claim 1, wherein the distal end comprises a blunt end.

### Claim 5 (depends on 1)

The tunneling tool recited in claim 1, wherein the proximal end comprises a frustoconcical section.

### Claim 6 (depends on 1)

The tunneling tool recited in claim 1, wherein at least one finger is flexible.

### Claim 7 (depends on 1)

The tunneling tool recited in claim 1, wherein at least one finger comprises at least one projection.

### Claim 8 (depends on 7)

The tunneling tool recited in claim 7, wherein at least one projection of one finger extends toward at least one projection of another finger.