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Delayed response of ankle jerk time changes in decreasing thyroid function in comparison with the serum cholesterol
Endokrinologie
|July 1, 1975
Summary
Serum cholesterol closely mirrors changes in protein-bound iodine (PBI) during altered thyroid function, proving useful for therapy monitoring. Ankle jerk time (AJT) shows a delayed response, particularly in younger patients.
Area of Science:
- Endocrinology
- Clinical Chemistry
Background:
- Thyroid function significantly impacts metabolic processes.
- Serum cholesterol and ankle jerk time (AJT) are established indicators of thyroid status.
Purpose of the Study:
- To investigate the relationship between serum cholesterol, protein-bound iodine (PBI), and AJT in varying thyroid function states.
- To assess the diagnostic and therapeutic monitoring utility of serum cholesterol and AJT.
Main Methods:
- Simultaneous measurement of serum cholesterol, PBI, and AJT in untreated and treated hypothyroid patients.
- Statistical analysis including correlation and covariance analysis.
Main Results:
- Serum cholesterol showed a significant correlation with log-transformed PBI (r = -0.6839), indicating close but variable association.
- Serum cholesterol is a sensitive indicator for longitudinal therapy evaluation but has limited diagnostic value for individual thyroid states.
- AJT exhibited a delayed response to decreasing thyroid function, with the delay being age-dependent.
Conclusions:
- Serum cholesterol is a valuable marker for monitoring thyroid function therapy due to its early reactivity and correlation with PBI.
- The delayed response of AJT suggests underlying mechanisms in skeletal muscle, independent of immediate T3/T4 ratio changes, impacting clinical assessment.