Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0026837 (muscle rigidity)
 1,077 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Tetanus is caused by the organism Clostridium tetani, which produces tetanospasmin, a neurotoxin responsible for the clinical manifestations of muscle rigidity and reflex spasms. The majority of cases follow an anaerobic wound infection associated with trauma. Incubation period is usually 3 days to 3 weeks. 75% of patients present with trismus. Reflex spasms are seen in 70% of patients and characterize the severity of the disease. Treatment involves removal of the offending organism, neutralization of free neurotoxin, controlling rigidity and reflex spasm, and minimizing complications. Diazepam may be used alone in mild cases. Severe cases require the addition of nondepolarizing neuromuscular blocking agents and mechanical ventilation. Respiratory complications occur early and require aggressive airway management. A serious, late complication is the syndrome of sympathetic nervous system overactivity that is treated with alpha and beta blockade. High mortality rates seen in the United States may be due to delays in diagnosis and lack of familiarity with treatment. The disease is preventable with adequate immunization.
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PMID:Tetanus: a review. 44 55

Seventy-seven patients who developed masseter muscle rigidity (MMR) after receiving succinylcholine to facilitate tracheal intubation were evaluated for malignant hyperthermia (MH) susceptibility by in vitro halothane and caffeine contracture tests. Thirty-nine patients were diagnosed as MH-susceptible. Neither age, sex, nor type of surgery or anesthesia distinguished MH-susceptible from nonsusceptible patients. Two susceptible and two nonsusceptible patients had evidence of a myopathy. Fifty-two patients had serum creatine phosphokinase (CPK) levels measured in the perioperative period. Although all values were above normal, CPK values equal to or greater than 20,000 IU within 24 hr of trismus (in the absence of myopathy) were observed in six of 30 patients diagnosed as MH-susceptible, but were found in none of the nonsusceptible patients. Considering the high percentage of patients exhibiting MMR that are indeed susceptible to MH (approximately 50%) compared to estimates of MH in the population as a whole (approximately 0.005%), MMR should be considered a presumptive sign of MH. Perioperative CPK values greater than 20,000 IU are highly suggestive of MH susceptibility. Patients exhibiting MMR should be evaluated for MH susceptibility and myopathies. Succinylcholine should be avoided for subsequent anesthetics in patients with a history of MMR.
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PMID:Masseter muscle rigidity and malignant hyperthermia susceptibility. 394 3

During the recent decade an increasing number of inquiries concerning cases of overdoses exhibiting typical signs of the serotonin syndrome have been recorded at the Swedish Poisons Information Centre. Four of these cases are presented together with a review of the literature. All patients had overdosed moclobemide and in one case this was the only drug taken. The other patients had ingested moclobemide together with citalopram (2 cases) and clomipramine (1 case). Moreover, other serotoninergic pharmaceuticals as sertraline and sumatriptan were simultaneously ingested in one case and buspirone in another. Three of the cases had hyperthermia, > 40 degrees C and the same number showed pronounced muscle rigidity, coma and mydriasis. Other severe signs and symptoms upon admission included positive Babinski and trismus in two cases each and seizures in one. All patients received mechanical ventilation. Two were treated with dantrolene sodium and one of them was given cyproheptadine as well. One patient received cyproheptadine treatment alone and another prolonged muscle relaxation. Three patients had a typical short clinical course, whereas one patient developed rhabdomyolysis, DIC and arrhythmias. All patients fully recovered.
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PMID:[Serotonin syndrome. Several cases of this often overlooked diagnosis]. 1208 84

During the recent decade an increasing number of inquiries concerning cases of overdoses exhibiting typical signs of the serotonin syndrome have been recorded at the Swedish Poisons Information Centre. Four of these cases are presented together with a review of the literature. All patients had overdosed moclobemide and in one case this was the only drug taken. The other patients had ingested moclobemide together with citalopram (2 cases) and clomipramine (1 case). Moreover, other serotoninergic pharmaceuticals as sertraline and sumatriptan were simultaneously ingested in one case and buspirone in another. Three of the cases had hyperthermia, > 40 degrees C and the same number showed pronounced muscle rigidity, coma and mydriasis. Other severe signs and symptoms upon admission included positive Babinski and trismus in two cases each and seizures in one. All patients received mechanical ventilation. Two were treated with dantrolene sodium and one of them was given cyproheptadine as well. One patient received cyproheptadine treatment alone and another prolonged muscle relaxation. Three patients had a typical short clinical course, whereas one patient developed rhabdomyolysis, DIC and arrhythmias. All patients fully recovered.
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PMID:[Serotonin syndrome--several cases of this often overlooked diagnosis]. 1255 8

Tetanus toxin, the product of Clostridium tetani, is the cause of tetanus symptoms. Tetanus toxin is taken up into terminals of lower motor neurons and transported axonally to the spinal cord and/or brainstem. Here the toxin moves trans-synaptically into inhibitory nerve terminals, where vesicular release of inhibitory neurotransmitters becomes blocked, leading to disinhibition of lower motor neurons. Muscle rigidity and spasms ensue, often manifesting as trismus/lockjaw, dysphagia, opistotonus, or rigidity and spasms of respiratory, laryngeal, and abdominal muscles, which may cause respiratory failure. Botulinum toxin, in contrast, largely remains in lower motor neuron terminals, inhibiting acetylcholine release and muscle activity. Therefore, botulinum toxin may reduce tetanus symptoms. Trismus may be treated with botulinum toxin injections into the masseter and temporalis muscles. This should probably be done early in the course of tetanus to reduce the risk of pulmonary aspiration, involuntary tongue biting, anorexia and dental caries. Other muscle groups are also amenable to botulinum toxin treatment. Six tetanus patients have been successfully treated with botulinum toxin A. This review discusses the use of botulinum toxin for tetanus in the context of the pathophysiology, symptomatology, and medical treatment of Clostridium tetani infection.
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PMID:Tetanus: pathophysiology, treatment, and the possibility of using botulinum toxin against tetanus-induced rigidity and spasms. 2329 59

Trismus, or masseter muscle rigidity, is a rare but previously described complication of succinylcholine-induced neuromuscular blockade. We present a case report that details unique aspects of suspected masseter muscle rigidity in the prehospital setting air medical setting after attempted rapid sequence intubation with succinylcholine. We then discuss the need for knowledge base of this life-threatening and rarely described syndrome as well as the importance of working through a differential diagnosis and specific trismus-focused airway algorithm. Trismus, or masseter muscle rigidity (MMR), is a rare but previously described complication of succinylcholine-induced neuromuscular blockade. It has been cited in anesthesia and emergency medicine literature as a potentially life-threatening complication and requires prompt intervention. This case report details a unique case of suspected MMR in the prehospital setting after attempted rapid sequence intubation (RSI) with succinylcholine performed by an experienced aeromedical flight crew.
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PMID:Suspected Succinylcholine-Induced Masseter Muscle Rigidity During Rapid Sequence Intubation in the Air Medical Setting. 3301 84