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Related Concept Videos

Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

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The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
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Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
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Skeletal muscle relaxants are widely used for muscle paralysis and relieving pain following any muscle injury or stiffness. However, depending on the drug type, they can have adverse effects that range from mild to severe. Usually, nondepolarizing neuromuscular blockers have minimal side effects. For example, drugs like d-tubocurarine, cisatracurium, and rocuronium cause hypotension, whereas drugs like baclofen, when stopped abruptly, can lead to the recurrence of spastic conditions.
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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
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Myasthenia Gravis: Overview and Treatment01:20

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Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
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Skeletal muscle relaxants are used to relax muscle tone and alleviate painful muscle contractions. However, the choice of skeletal muscle relaxants depends on the duration of the surgical procedure in order to minimize potential side effects. Skeletal muscle relaxants like neuromuscular blocking agents [NMBAs] are commonly employed as adjuvants alongside general anesthetics in clinical settings. NMBAs are also used to maintain controlled ventilation during surgery of the larynx or pharynx...
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Neuromuscular Weakness in Intensive Care.

Deepa Malaiyandi1, Elysia James1

  • 1Division of Neurocritical Care, Department of Neurology, University of Toledo College of Medicine, UT/PPG Neurosciences Center, 2130 West Central Avenue, Suite 201, Room 2355, Toledo, OH 43606, USA.

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Summary

Peripheral nervous system diseases pose diagnostic challenges in intensive care units. A multidisciplinary approach improves outcomes, with survivors generally regaining good function.

Keywords:
Acute myopathyCritical illness associated weaknessGuillain-Barre syndromeIntensive care unit acquired weaknessMyasthenic crisisNeuromuscular respiratory failureNeuromuscular weakness

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Area of Science:

  • Neurology
  • Intensive Care Medicine

Background:

  • Peripheral nervous system (PNS) diseases present complex diagnostic challenges in the intensive care unit (ICU) setting.
  • The wide range of causes, varied presentations, and often ambiguous or misidentified symptoms complicate diagnosis and management.
  • Effective care requires a coordinated, multidisciplinary strategy.

Purpose of the Study:

  • To highlight the diagnostic complexities of PNS diseases in critically ill patients.
  • To emphasize the importance of a multidisciplinary team in managing these conditions.
  • To describe the general functional recovery trajectory for survivors.

Main Methods:

  • Review of diagnostic challenges and management strategies for PNS diseases in the ICU.
  • Emphasis on the collaborative roles of neurocritical care, neuromuscular specialists, rehabilitation services, and specialty pharmacists.
  • Analysis of functional outcomes in ICU survivors with PNS diseases.

Main Results:

  • PNS diseases represent a significant diagnostic challenge in ICUs due to diverse etiologies and nonspecific symptoms.
  • Multidisciplinary collaboration, including specialists in neuromuscular care, rehabilitation, and pharmacy, is crucial for optimal patient management.
  • Patients who survive critical illness due to PNS diseases typically achieve good functional recovery compared to their pre-ICU baseline.

Conclusions:

  • Integrated care models are essential for addressing the complexities of diagnosing and managing peripheral nervous system disorders in intensive care.
  • Early and collaborative intervention by a specialized team can lead to favorable functional outcomes for survivors.
  • Further research into specific PNS disease management protocols within critical care settings is warranted.