Did you know that Carpal Tunnel Syndrome (CTS) can affect anyone? None of us are immune to developing CTS as roughly 1 out of 20 of us will develop CTS in our lifetime! This month, let’s look at some of the risk factors for developing CTS:
- Race: Caucasians carry the greatest risk of developing CTS.
- Gender: Women are three times more likely than men to develop CTS. This may be because female wrists are smaller and shaped a little differently than male wrists, but hormonal differences are probably the most important reason for this variance.
- Pregnancy: Up to 62% of pregnant women develop CTS. This is thought to be due to the excess fluid retention that normally occurs during pregnancy and most likely stems from the elevation in hormone levels that NORMALLY occur during pregnancy. The prevalence in the first, second, and third trimesters is 11%, 26%, and 63%, respectively, thus supporting the fact that the risk increases with the length of the pregnancy. Though CTS usually resolves after giving birth, symptoms can continue for as long as three years following delivery!
- Birth Control Pill (BCP): The use of BCPs increases CTS risk due to an increase in hormonal levels similar to the CTS risk increase during pregnancy.
- Occupational: Workers in highly repetitive, hand-intensive occupations (such as line work, sewing, finishing, meat processing, poultry or fish packing) have a higher rate of developing CTS.
- Injury to the wrist or hand: An obvious example is a wrist fracture from a slip and fall, sports injury, or blunt trauma like a car accident. When there is a direct pinch on the median nerve, nerve damage can occur quite quickly, and as a result, the onset of symptoms can be very fast. Less obvious injuries, which usually have significantly slower onsets, include repetitive motion injuries, often referred to as “cumulative trauma disorders” and include a group of conditions such as tendonitis, sprain/strain, bursitis, and other types of soft tissue injuries.
- Certain conditions: Nerve damaging conditions that can cause CTS include diabetes and alcoholism. Other conditions that can contribute and/or cause CTS include menopause, obesity, thyroid disorders, kidney failure, and more.
- Inflammatory conditions: These include several types of arthritis such as rheumatoid, lupus, and others. Osteoarthritis is technically NOT an “inflammatory” condition but it can cause CTS by compressing the median nerve via a bone spur formed within the carpal tunnel.
- Faulty workstations: A job site has A LOT to do with whether or not a person develops CTS. Though jobs that require fast, repetitive movements pose the greatest risk (see #5 above), other work-related factors that may be controllable can also significantly contribute to the development of CTS. Some of these include the shape of tools such as screwdriver handles shaped like a gun (pistol) which allow for better alignment of the wrist than a “normal” straight screwdriver handle. Another is a power tool that may have too much vibration or torques too hard at the end of a cycle. A handle that is too cold/hard (e.g., metal handle) or that may be too large for the worker’s hand is an additional factor to consider. Positioning the work so that the wrists can stay straight vs. bent can be VERY helpful. In fact, if some of these “ergonomic” factors are not fixed, CTS can be next to impossible to remedy. Also, poor posture in the back, neck, and the rest of the body can result in compensatory faulty postures elsewhere. Look in a mirror and poke your chin out towards the mirror. Now look at your shoulders. See how they roll forward and feel the strain in your upper back and neck? Keep your chin tucked in, NOT out. This can make a BIG difference in your posture!
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