Medical treatment system and methods using a plurality of fluid lines

• US 10,098,996 B2
• Filed: 06/13/2016
• Issued: 10/16/2018
• Est. Priority Date: 07/07/2010
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Scarpaci, Jacob W., Helmore, Simon C., McGill, David W.
• Primary Examiner(s): Nguyen, Sang
• Application Number:
  US15/181,248
• Publication Number:
  US 20160296687A1
• Time in Patent Office: 855 Days
• CPC Class Codes: A61M 1/152 Details related to the interface between cassette and machine
• 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 1/1565 Details of valves
• CPC Class Codes: A61M 1/159 specially adapted for peritoneal dialysis
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
• CPC Class Codes: A61M 1/288 Priming priming in extracorporeal blood circuits A61M1/3643
• CPC Class Codes: A61M 1/3656 Monitoring patency or flow at connection sites; Detecting disconnections
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/13 with means for the detection of operative contact with patient, e.g. lip sensor
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2205/36 related to heating or cooling
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/702 automatically during use
• CPC Class Codes: G01V 8/20 : using multiple transmitters or receivers

Abstract

A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include patient line state detector for detecting whether a patient line is primed before it is to be connected to the patient. The patient line state detector can also the ability to detect whether a patient line has been properly mounted for priming. Both patient line presence/absence and fill state can be determined using an optical system, e.g., one that employs a single optical sensor.

Claims

1. A fluid handling cassette configured to reversibly engage with a pump control unit for operating the cassette, comprising:

a body having an engagement side comprising a pump chamber formed as a depression in the engagement side of the body, a fluid inlet end and a fluid outlet end, the fluid inlet and outlet ends comprising one or more ports on the body in fluid communication with the pump chamber via one or more flowpaths in the body; and

a port on the fluid inlet end comprising a spike, the spike configured to mate with a connector of a fluid line when in use, or to mate with a spike cap when not in use;

the spike comprising a proximal base adjacent the fluid inlet end of the cassette, and a distal end configured to penetrate the fluid line connector;

the base of the spike comprising one or more elongate posts extending in a longitudinal direction distally along the base of the spike from the fluid inlet end of the cassette body, the posts arranged to make frictional contact with an internal surface of a spike cap installed on the spike;

the internal surface of the spike cap comprising a circumferential raised rib that contacts the spike distal to a distal end of the one or more elongate posts, the circumferential raised rib configured to form a seal around the spike;

wherein a portion of the spike distal to the circumferential raised rib of the installed spike cap is in fluid communication with the one or more flowpaths in the body of the cassette, and wherein a portion of the spike proximal to the circumferential raised rib of the installed spike cap is in fluid communication with an outer surface of the body of the cassette.

2. The fluid handling cassette of claim 1, wherein the installed spike cap comprises one or more partially circumferential raised ribs formed around the internal surface of the spike cap at a location that mates with the spike distal to the proximal base of the spike.

3. A fluid handling cassette configured to reversibly engage with a pump control unit for operating the cassette, comprising:

a body having an engagement side comprising a pump chamber formed as a depression in the engagement side of the body, a fluid inlet end and a fluid outlet end, the fluid inlet and outlet ends comprising one or more ports on the body in fluid communication with the pump chamber via one or more flowpaths in the body; and

a port on the fluid inlet end comprising a spike, the spike configured to mate with a connector of a fluid line when in use, or to mate with a spike cap when not in use;

the spike comprising a proximal base adjacent the fluid inlet end of the cassette, and a distal end configured to penetrate the fluid line connector;

the base of the spike comprising one or more partially circumferential ribs formed around the spike, each partially circumferential rib having a gap in which the outer surface of the spike fails to contact an internal surface of an installed spike cap;

the internal surface of the spike cap comprising a circumferential raised rib that contacts the spike distal to a distal end of the one or more partially circumferential ribs, the circumferential raised rib configured to form a seal around the spike;

wherein a portion of the spike distal to the circumferential raised rib of the installed spike cap is in fluid communication with the one or more flowpaths in the body of the cassette, and wherein a portion of the spike proximal to the circumferential raised rib of the installed spike cap is in fluid communication with an outer surface of the body of the cassette.

4. The fluid handling cassette of claim 3, wherein the installed spike cap comprises one or more partially circumferential raised ribs formed around the internal surface of the spike cap at a location that mates with the spike distal to the proximal base of the spike.

5. A fluid handling cassette configured to reversibly engage with a pump control unit for operating the cassette, comprising:

a body having an engagement side comprising a pump chamber formed as a depression in the engagement side of the body, a fluid inlet end and a fluid outlet end, the fluid inlet and outlet ends comprising one or more ports on the body in fluid communication with the pump chamber via one or more flowpaths in the body; and

a port on the fluid inlet end comprising a spike, the spike configured to mate with a connector of a fluid line when in use, or to mate with a spike cap when not in use;

the spike comprising a proximal base adjacent the fluid inlet end of the cassette, and a distal end configured to penetrate the fluid line connector;

the proximal base of the spike arranged to mate with a spike cap via a frictional contact between an external surface of the spike and an internal surface of the spike cap such that one or more gaps are present in said frictional contact so that a portion of the external surface of the spike is exposed to any gas or liquid to which an external surface of the body of the cassette is exposed when the spike cap is installed on the spike;

the internal surface of the spike cap comprising a circumferential raised rib that contacts the spike distal to the one or more gaps in the frictional contact, the circumferential raised rib configured to form a seal around the spike;

wherein a portion of the spike distal to the circumferential raised rib of the installed spike cap is in fluid communication with the one or more flowpaths in the body of the cassette, and wherein a portion of the spike proximal to the circumferential raised rib of the installed spike cap is in fluid communication with an outer surface of the body of the cassette.

6. The fluid handling cassette of claim 5, wherein the installed spike cap comprises one or more partially circumferential raised ribs formed around the internal surface of the spike cap at a location that mates with the spike distal to the proximal base of the spike.