http://www.fpnotebook.com/
TetanyAka: Chvostek's Sign
- Pathophysiology
- Lowered muscular excitability threshold
- Results in involuntary spasms
- Diffuse muscles involved in severe, spontaneous tetany
- Laryngeal Stridor
- Generalized Tonic Clonic Seizure
- Death may occur
- Causes
- Symptoms
- Muscle spasms
- Spasm may be preceded by lip, arm, leg Paresthesias
- Signs
- Rigid, unyielding muscles
- Carpopedal Spasm
- Chvostek's Sign
- Tap Facial Nerve against bone just anterior to ear
- Positive sign produces ipsilateral facial contraction
Tetany (C0039621) | |
|---|---|
| Definition (MSH) | A disorder characterized by muscle twitches, cramps, and carpopedal spasm, and when severe, laryngospasm and seizures. This condition is associated with unstable depolarization of axonal membranes, primarily in the peripheral nervous system. Tetany usually results from HYPOCALCEMIA or reduced serum levels of MAGNESIUM that may be associated with HYPERVENTILATION; HYPOPARATHYROIDISM; RICKETS; UREMIA; or other conditions. (From Adams et al., Principles of Neurology, 6th ed, p1490) |
| Definition (CSP) | hyperexcitability of nerve and muscle when the concentration of extracellular ionized calcium is decreased. |
| Concepts | Disease or Syndrome (T047) |
| ICD9 | 781.7 |
| MSH | D013746 |
| English | Tetanies, Tetany |
| Spanish | tetania |
| Parent Concepts | Musculoskeletal symptom (C0231443), Hypocalcemia result (C0020598), Hypoparathyroidism (C0020626), Neurologic Manifestations (C0027854), Peripheral Neuropathy (C0031117), Myopathy (C0026848), CALCIUM/PHOSPHATE ABNORMALITY (C0549633), Symptoms involving nervous and musculoskeletal systems (C0159033), Neuromuscular Manifestations (C0752252), nervous system disorder (C0027765), Tetany (C0039621), [D]Nervous and musculoskeletal symptoms (C0362038), Ambiguous concept (C1274012), Duplicate concept (C1274013) |
| Sources | AOD, COSTAR, CSP, CST, ICD9CM, LCH, MSH, MTH, NDFRT, OMIM, SCTSPA, SNOMEDCT Derived from the NIH UMLS (Unified Medical Language System) |
