What did Helen Murray Free invent?

What did Helen Murray Free invent?

A Miles Laboratories research team led by Alfred and Helen Free developed the first diagnostic test strip, Clinistix®, for detecting glucose in urine. Reagent-impregnated strips changed color based on the concentration of glucose.

Who invented the urine dipstick?

Free and Alfred Free. The Frees revolutionized diagnostic urine testing with their invention of a chemically coated paper dipstick.

Where was Helen Murray Free born?

Pittsburgh, PA
Helen Murray Free/Place of birth

Is Helen Murray Free alive?

Deceased (1923–2021)
Helen Murray Free/Living or Deceased

What is Clinistix strip?

[klin´ĭ-stiks] trademark for glucose oxidase reagent strips used to test for glucose in urine. The strip is dipped into the urine and positive or negative results are indicated by the color of the strip.

What does SG mean on a urine test?

Definition. Urine specific gravity is a laboratory test that shows the concentration of all chemical particles in the urine.

What is sugar level in blood test?

A blood glucose test is a blood test that screens for diabetes by measuring the level of glucose (sugar) in a person’s blood. Normal blood glucose level (while fasting) range within 70 to 99 mg/dL (3.9 to 5.5 mmol/L). Higher ranges could indicate pre-diabetes or diabetes.

What is Clinitest?

Clinitest tablets are used to test how much sugar (glucose) there is in a person’s urine. Poisoning occurs from swallowing these tablets. Clinitest tablets used to be used to check how well a person’s diabetes was being controlled. These tablets are rarely used today.

How do diabetic strips work?

Test strips work by placing blood on the strip. The blood reacts with an enzyme on the strip called glucose oxidase to produce gluconic acid using glucose in the blood. At the other end of the strip, which is connected to the glucometer, the meter sends a current to the strip.

What does urobilinogen 1+ mean?

Normal urine contains some urobilinogen. If there is little or no urobilinogen in urine, it can mean your liver isn’t working correctly. Too much urobilinogen in urine can indicate a liver disease such as hepatitis or cirrhosis.

What was the cause of Helen Murray free death?

Helen Murray Free, a chemist who ushered in a revolution in diagnostic testing when she co-developed the dip-and-read diabetes test, a paper strip that detected glucose in urine, died on Saturday at a hospice facility in Elkhart, Ind. She was 98. The cause was complications of a stroke, her son Eric said.

How many children did Helen Murray Free have?

Together, they had six children: Eric, Kurt, Jake, Bonnie, Nina, and Penny. She also had three stepchildren. Free died on May 1, 2021, at a hospice facility in Elkhart. She was 98, and suffered from complications of a stroke.

When was Helen Murray free inducted into the Hall of Fame?

Free was inducted into the National Inventor’s Hall of Fame in 2000. She was awarded the National Medal of Technology and Innovation a decade later by Barack Obama.

What did Helen m.free do for a living?

The ACS named an award in her honor, the Helen M. Free Award in Public Outreach. She and her husband hold several patents and coauthored two books on urinalysis. She received the ACS’s Garvan Medal, honoring distinguished service to chemistry by a woman, in 1980.

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