Controller for measuring prostate volume

• US 9,538,952 B2
• Filed: 10/30/2012
• Issued: 01/10/2017
• Est. Priority Date: 10/30/2012
• Status: Active Grant

• Current Assignee: MedicaMetrix LLC
• Original Assignee: MedicaMetrix, Inc.
• Inventors: LaFarge, Christopher
• Primary Examiner(s): Kish, James
• Assistant Examiner(s): Selkin, Saurel J
• Application Number:
  US13/663,890
• Publication Number:
  US 20140121536A1
• Time in Patent Office: 1,533 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 2562/228 Sensors with optical connectors
• CPC Class Codes: A61B 5/4381 Prostate evaluation or disorder diagnosis
• CPC Class Codes: A61B 5/6806 Gloves
• CPC Class Codes: A61B 5/6826 Finger

Abstract

Systems and methods are provided herein that generally involve measuring a prostate or other object. In some embodiments, a membrane can be sealed over a digit extension to form a closed volume. The closed volume can be inflated via an inflation tube, and a reference pattern can be disposed within the closed volume along with a measurement assembly. In use, a user can put on the glove, position the membrane in proximity to a rectal wall overlying a prostate, and inflate the membrane. As the user slides their finger across the rectal wall, optical fibers in the measurement assembly can move relative to a reference pattern, and a controller can sense light reflected through the fibers from the reference pattern. The controller can calculate or estimate various attributes of the prostate based on the reflected light, such as the palpable surface width or volume.

Claims

1. A system for estimating the volume of a prostate, comprising:

a transmitting fiber;

a light source that produces light to be transmitted through the transmitting fiber;

first and second receiver fibers;

a first detector circuit that receives light transmitted through the first receiver fiber after being transmitted through the transmitting fiber and reflected back from a reference pattern of a measurement assembly;

a second detector circuit that receives light transmitted through the second receiver fiber after being transmitted through the transmitting fiber and reflected back from the reference pattern of the measurement assembly;

a processor programmed to provide;

a sensor input module configured to receive a first signal from the first detector circuit indicative of light reflected from the reference pattern through the first receiver fiber and a second signal from the second detector circuit indicative of light reflected from the reference pattern through the second receiver fiber as at least a portion of the measurement assembly is moved across the reference pattern from a first prostate lateral margin to a second prostate lateral margin, the sensor module being configured to detect based on a timing at which light reflected from the reference pattern is detected through the first and second receiver fibers when a change in the direction in which the portion of the measurement assembly moves relative to the reference pattern occurs,

a distance measuring module configured to convert the first and second signals into a measured prostate palpable surface width (PS_W),

a volume estimation module configured to estimate a volume (V) of the prostate based on the measured palpable surface width (PS_W), and

an error detection module configured to detect that a measurement error has occurred when the sensor module detects that the direction of movement changed and, in response to the error, at least one of (i) adjust the measured palpable surface width (PS_W) to compensate for the change in direction and (ii) alert a user that a change in direction occurred.

2. The system of claim 1, wherein the volume estimation module estimates the volume (V) as V=PS_W³×

k, wherein k is a constant.

3. The system of claim 2, wherein k is between 0.35 and 0.45.

4. The system of claim 2, wherein k is 0.3926991.

5. The system of claim 1, wherein the processor is programmed to provide a display module configured to drive a display to display the estimated volume (V).

6. The system of claim 1, wherein the processor is programmed to provide an inflation control module configured to actuate a pump or a control valve to inflate a membrane disposed around a digit extension of a glove to a predetermined pressure or with a predetermined volume of air.

7. The system of claim 1, wherein the processor is programmed to provide an RFID interface module configured to receive information indicative of an RFID signature of a disposable unit and to determine whether the disposable unit is an authenticated disposable unit.

8. A method of estimating the volume of a prostate, comprising:

moving a transmitting optical fiber, a first receiving optical fiber, and a second receiving optical fiber across a reference pattern from a first lateral margin of a prostate to a second lateral margin of the prostate to generate information indicative of light reflected from the reference pattern;

using at least one processor to determine from the generated information when a change in direction of movement across the reference pattern occurs based on the timing at which light reflected from the reference pattern is detected through the first and second receiving optical fibers;

using at least one processor to convert the generated information into a measured prostate palpable surface width (PS_W);

using the at least one processor to estimate a volume (V) of the prostate based on the measured palpable surface width (PS_W); and

when a change in the direction of movement occurs, at least one of (i) adjusting the measured palpable surface width (PS_W) to compensate for the change in direction and (ii) alerting a user that a change in direction occurred.

9. The method of claim 8, further comprising estimating the volume (V) as V=PS_W³×

k, wherein k is a constant.

10. The method of claim 9, wherein k is between 0.35 and 0.45.

11. The method of claim 9, wherein k is 0.3926991.

12. The method of claim 8, further comprising using the at least one processor to drive a display to display the estimated volume (V).

13. The method of claim 8, further comprising using the at least one processor to actuate a pump or a control valve to inflate a membrane disposed around a digit extension of a glove to a predetermined pressure or with a predetermined volume of air.

14. The method of claim 8, further comprising using the at least one processor to receive information indicative of an RFID signature of a disposable unit and to determine whether the disposable unit is an authenticated disposable unit.