Optical method and apparatus for diagnosing human spermatozoa

• US 5,061,075 A
• Filed: 08/07/1989
• Issued: 10/29/1991
• Est. Priority Date: 08/07/1989
• Status: Expired due to Fees

• Current Assignee: Mediscience Technology Corp. (Sensivida Medical Technologies, Inc.)
• Original Assignee: Mediscience Technology Corp. (Sensivida Medical Technologies, Inc.)
• Inventors: Oka, Nobutoshi, Nagamatsu, George R., Alfano, Robert R.
• Primary Examiner(s): McGraw, Vincent P.
• Assistant Examiner(s): Keesee, LaCharles P.
• Application Number:
  US07/390,703
• Time in Patent Office: 813 Days
• Field of Search: 356/338, 356/440, 356/337, 356/342, 356/318, 356/327, 356/417, 356/364, 250/462.1, 250/458.1, 250/459.1, 250/461.2, 250/461.1, 436/172
• US Class Current: 356/417
• CPC Class Codes: G01N 21/6445 Measuring fluorescence polarisation
• CPC Class Codes: G01P 13/00 Indicating or recording presence, absence, or direction, of movement electric switches H01H; counting moving objects G06M7/00

Abstract

The sperm count of a specimen of sperm is measured by exciting the specimen with a beam of substantially monochromatic light, then measuring the intensity of the intrinsic native fluorescence emitted or the scattered light from the specimen, and then determining the sperm count using the intensity measurements. The motitily of a specimen of sperm is determined by exciting the specimen with a beam of substantially monochromatic polarized light, then measuring the intensity of the parallel and perpendicular components of the intrinsic native fluorescene emitted or the intensity of the scattered light from the specimen at a predetermined wavelength; and then determining the motitily using the two intensity measurements with parallel and perpendicular polarizations.

Claims

1. A method of measuring the sperm count in a specimen of sperm comprising:

a. exciting the specimen with a beam of monochromatic light,

b. measuring the intensity of the intrinsic native fluorescence emitted from the specimen, and then

c. determining the sperm count using the intensity measurement.

2. The method of claim 1 and wherein determining the sperm count using the intensity measurement includes determining the ratio of the intensity measurement so measured and the intensity of a reference signal and then using that ratio to determine the sperm count.

3. The method of claim 2 and wherein the exciting light is at about 488 nm and the fluorescence measured is at about 535 nm.

4. The method of claim 2 and wherein determining the sperm count comprises comparing the ratio with a standard.

5. Apparatus for measuring the sperm count of a specimen of sperm comprising:

a. means for exciting the specimen with a beam of monochromatic light,

b. means for measuring the intensity of the intrinsic native fluorescence emitted from the specimen, and

c. means for determining the sperm count using the intensity measurement.

6. The apparatus of claim 5 and wherein the means for exciting the specimen comprises either a lamp with a filter or a laser.

7. The apparatus of claim 6 and wherein the laser is either a solid, a gas or a semiconductor.

8. The apparatus of claim 6 and wherein the laser is either an argon laser, a He-Ne laser a He-Cd laser a dye laser or a semiconductor laser.

9. The apparatus of claim 5 and wherein the determining means includes a computer.

10. The apparatus of claim 5 and wherein the means for determining sperm count using the intensity measurement includes means for generating a reference signal and means for producing an output signal related to the intrinsic native fluorescence emitted from the sample and the reference signal.

11. A method of determining the motility of a specimen of sperm comprising:

a. exciting the specimen with a beam of monochromatic polarized light,

b. measuring the intensity of the parallel and perpendicular components of the intrinsic native fluorescence emitted from the specimen, at a predetermined wavelength, and then

c. determining the motility using the two intensity measurements.

12. Apparatus for determining the motility of a specimen of sperm comprising:

a. means exciting the specimen with a beam of monochromatic polarized light,

b. means measuring the intensity of the parallel and perpendicular components of the intrinsic native fluorescence emitted from the specimen at predetermined wavelength, and

c. means determining the motility using the two intensity measurements.

13. The apparatus of claim 12 and wherein the measuring means includes a Nicol prism for splitting the intrinsic native fluorescence emitted from the specimen into two beams, one having only polarized light parallel to the incident beam and the other having only polarized light perpendicular to the incident beam.

14. A method of determining the sperm count in a specimen, the sperm being obtained from a sample of semen which has been centrifuged to remove the plasma, washed and then resuspended, the method comprising:

a. exciting the specimen with a beam of monochromatic light,

b. measuring the intensity of the intrinsic native fluorescence emitted from the specimen, and then

c. determining the sperm count using the intensity measurement.

15. A method of determining the motility of a specimen of sperm comprising:

a. exciting the specimen with a beam of polarized light,

b. measuring the intensity of the parallel and perpendicular components of the light scattered from the specimen, and then

c. determining the motility using the two intensity measurements.