Posts Tagged: Hair Shaft Diameter

Why is Hair Loss in Women Difficult to Diagnosis?

August 4th, 2009

Q: Why is hair loss in women difficult to diagnosis?

A: The majority of hair loss in women is diffuse. This means that the hair thins all over the scalp, rather than on the front and top characteristic of balding in men.

Diffuse hair loss can be caused by a number of things besides genetics; including medical problems such as anemia, thyroid disease, and polycystic ovaries; and medications such as birth control pills, blood pressure pills, seizure medications and blood thinners. Stress and pregnancy can also cause this type of diffuse hair loss.

The hallmark of genetic female pattern hair loss is miniaturization (change in hair shaft diameter).

Hair shedding is characteristic of many of the other conditions, but is less commonly seen in genetic hair loss.

For a complete discussion on hair loss in women, visit the pages for the diagnosis, causes, and classification of female hair loss. Or view photos of our female hair restoration patients for examples of Dr. Bernstein’s work on restoring hairlines, hair at the temples, and eyebrows.

Also, a reminder, Bernstein Medical – Center for Hair Restoration will be holding a Women’s Hair Loss Open House at our facility in Midtown Manhattan, New York City on Wednesday, August 12th, 2009 (4-6pm). You can register to attend the open house by following this link. We look forward to seeing you there!


Posted by Robert M. Bernstein M.D. at 8:10 am

How Does Densitometer Help Diagnose Hair Loss?

August 17th, 2006

Q: Dr. Bernstein, I was reading about a densitometer on your website. What is it and what is it actually used for?

A: The hair densitometer was introduced to hair restoration surgeons by Dr. Rassman in 1993. It is a small, portable, instrument that has a magnifying lens and an opening of 10mm2.

To use it, the doctor clips the hair short (~ 1-mm) and the instrument is then placed on the scalp. The doctor counts the total number of hairs in the field, looks at the number of hairs per follicular unit and assesses the diameter of the hair, looking in particular for abnormal levels of miniaturization (decreased hair shaft diameter caused by the effects of DHT).

The densitometer can increase the accuracy of the diagnosis of genetic hair loss by picking up early miniaturization.

It can also better assess a person’s donor hair supply, thus helping to determine which patients are candidates for a hair transplant.

Densitometry has helped us define the conditions of diffuse patterned and unpatterned hair loss (DPA and DUPA) and help to refine the diagnosis of hair loss in women.


Posted by Robert M. Bernstein M.D. at 1:18 pm

What Factors Determine Hair Transplant Graft Count?

January 4th, 2006

Q: Is it possible to tell me roughly how many grafts would be left from donor area if one had a hair transplant of 2,500 grafts and had a density of around 2.0? G.H. – New York, NY

A: How much hair can be harvested in total depends upon a number of factors besides donor density. These include: scalp laxity, hair characteristics (such as hair shaft diameter, color and wave), and the actual dimensions of the permanent zone.

Every person is different, so all of these factors would need to be taken into account to determine the total number of grafts that would be available for the hair restoration.


Posted by Robert M. Bernstein M.D. at 2:16 pm






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