Drip chamber with hydrophobic interior surface

• US 9,801,996 B2
• Filed: 05/13/2016
• Issued: 10/31/2017
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Inventors: Munro, James F., Bui, Tuan
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US15/154,048
• Publication Number:
  US 20160250412A1
• Time in Patent Office: 536 Days
• Field of Search: 604251, 206438
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2207/00 Methods of manufacture, assembly or production
• CPC Class Codes: A61M 5/1411 Drip chambers A61M5/162, A61M5/1689, A61M5/40 take precedence
• CPC Class Codes: A61M 5/1689 Drip counters
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A drip chamber for an infusion tube, including: a first end including a drip tube; a second end including an exit port; and a wall connecting the first and second ends and including an interior surface with a hydrophobic portion. The drip chamber includes a space enclosed by the interior wall and the first and second ends. The hydrophobic portion of the interior surface repels liquid contacting the hydrophobic coating. The hydrophobic portion of the interior surface enables light to refract through the hydrophobic portion and the wall in the same manner as is the case when the hydrophobic portion is not present on the interior surface.

Claims

1. A method of fabricating a drip chamber for an infusion tube, comprising:

forming a first end including a drip tube;

forming a second end including an exit port;

forming a wall connecting the first and second ends and including an interior surface with a hydrophobic portion; and

enclosing a space defined by the interior surface of the wall and the first and second ends, wherein;

the hydrophobic portion of the interior surface repels liquid contacting the hydrophobic portion; and

,

the hydrophobic portion of the interior surface is configured for refracting substantially all light being transmitted through the wall, and eliminates substantially all reflectance or glare formed on the wall.

2. The method of claim 1, wherein the hydrophobic portion of the interior surface enables direct mapping of the light passing through the hydrophobic portion of the interior surface from a point within the drip chamber to a point on an image of the point in the drip chamber.

3. The method of claim 1, wherein the hydrophobic portion of the interior surface is aligned with the end of the drip tube in a direction orthogonal to a longitudinal axis for the drip chamber passing through the first and second ends of the drip chamber.

4. The method of claim 1, further including applying said hydrophobic portion to extend from said first end to said second end.

5. An optical imaging system for an infusion tube, comprising:

a drip chamber including;

a first portion with a drip tube;

a second portion with an exit port;

a third portion located between the first and second portions; and

,

a wall;

connecting the first and second ends; and

,

including an interior surface with a hydrophobic portion aligned with at least one of the first or third portions in a direction orthogonal to a longitudinal axis for the drip chamber passing through the first and second ends;

at least one light source for emitting light;

an optics system including;

at least one lens for receiving and transmitting the light transmitted through the hydrophobic portion of the interior surface and the at least one of the first or third portions; and

,

an image sensor for;

receiving the transmitted light from the at least one lens; and

,

generating and transmitting data characterizing the transmitted light from the at least one lens;

a memory element configured to store computer readable instructions; and

,

at least one specially programmed processor configured to execute the computer readable instructions to generate, using the data, at least one image of the at least one of the first or third portions, wherein;

the hydrophobic portion of the interior surface repels liquid contacting the hydrophobic portion of the interior surface; and

,

the hydrophobic portion of the interior surface enables the light to pass through the hydrophobic portion of the interior surface without scattering.

6. The optical imaging system of claim 5, wherein the hydrophobic portion of the interior surface enables direct mapping of the light from respective points within the first or third portions to respective points on the at least one image.

7. A method of imaging an infusion tube having a drip chamber including a first portion with a drip tube, a second portion with an exit port, a third portion located between the first and second portions, and a wall connecting the first and second ends and including an interior surface with a hydrophobic portion aligned with at least one of the first or third portions in a direction orthogonal to a longitudinal axis for the drip chamber passing through the first and second ends, comprising:

repelling liquid contacting the hydrophobic portion of the interior surface;

emitting, using at least at least one light source, light;

transmitting the light through the hydrophobic portion of the interior surface and at least one of the first or third portions without scattering the light;

receiving, using at least one lens, the light transmitted through the hydrophobic portion of the interior surface and the at least one of the first or third portions;

transmitting, through the at least one lens, the light transmitted through the hydrophobic portion of the interior surface and the at least one of the first or third portions;

receiving, using an image sensor, the transmitted light from the at least one lens;

generating and transmitting, using the image sensor, data characterizing the transmitted light from the at least one lens;

storing computer readable instructions in a memory element; and

,

executing the computer readable instructions, using at least one specially programmed processor and the data, to generate at least one image of the at least one of the first or third portions.

8. The method of claim 7, further comprising:

directly mapping, using the at least one specially programmed processor, the light from respective points within the at least one of the first or third portions to respective points on the at least one image.