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Acute Inflammatory Demyelinating Polyradiculoneuropathy: Follow-up
Updated: Jan 15, 2009
Follow-up
Further Inpatient Care
Based on the severity of symptoms, patients with acute inflammatory demyelinating polyradiculoneuropathy (AIDP) may require further inpatient services.
- Patients should have cardiac monitoring to confirm and treat arrhythmias.
- Pulmonary function tests such as FVC and negative inspiratory pressure should be performed 3-4 times a day until a patient has reached a plateau for several days.
- Transfer to an ICU is recommended for patients with worsening respiratory effort (ie, FVC <20 mL/kg) or cardiac arrhythmias.
- Physical therapy should be initiated early to help increase patient activity and mobility. Patients who do not recover quickly benefit by transfer to an inpatient rehabilitation center before returning home.
Further Outpatient Care
- Generally, all patients in whom AIDP is suspected should be admitted for further monitoring and treatment.
- Patients who present with mild neurologic impairment after already reaching a plateau can be treated as outpatients with close supervision.
- Upon discharge, patients require several follow-up visits to ensure that relapses do not occur and to help coordinate home-health services if necessary. Physical and occupational therapy, either in a long-term rehabilitation unit or at home, help many patients return more rapidly to their baseline level of activity.
- Relapses occur (10-20%) following completion of plasma exchange, and these relapses frequently respond to a second course of treatment. Similarly, relapses that follow IVIG therapy also respond to a second course.
Transfer
- To the ICU when respiratory failure is impending or when cardiac arrhythmias are occurring
- To regional or tertiary hospitals if a community hospital does not have an ICU or is unable to provide IVIg or plasmapheresis therapy
Complications
Critically ill patients are susceptible to the same complications as other intubated patients, including pneumonia, sepsis, skin decubiti, deep venous thrombosis, and urinary tract infections. Patients with AIDP have some unique complications that may cause significant morbidity, the most common being pain, labile blood pressure, and increased sensitivity to cardiac medications.
Prognosis
- About 75% of patients have an excellent recovery and regain their premorbid condition.
- Some of these patients experience easy fatigability for many years.
- Almost all of the remaining patients have mild or moderately severe impairment but remain independent in most functions. Residual complaints include dysesthesias, foot drop, and intrinsic hand muscle weakness.
- Severe disability occurs in fewer than 5% of patients, who do not recover full independence. Patients with residual deficits are usually those who required mechanical intubation. Improvement is usually complete by 6 months. In more serious cases, recovery may continue for 18-24 months.
- Death occurs in only 2-6% of patients and is usually due to cardiac arrest, ARDS, pulmonary embolism, severe bronchospasm, pneumonia, or sepsis.
- About 10% of patients have a relapse 1-6 weeks after completing immunomodulatory therapy. These patients can be treated with a second course of immunomodulation.
- Fewer than 1% of patients have AIDP 1 or more years after onset of symptoms. In some cases, the recurrence follows immunization. This recurrence differs from CIDP.
- Sporadic cases of recurrent Guillain-Barré syndrome13 and rare cases of recurrent Guillain-Barré syndrome after a long asymptomatic period14 have been reported. Some authors consider recurrent Guillain-Barré syndrome a variant of CIDP, while others maintain that they are 2 different entities.Martic et al describe a patient who developed Guillain-Barré syndrome as a child and experienced a full relapse after 19 years with another innocuous episode 10 years later.15
- Several prognostic factors have been identified.
- In general, younger patients have a better prognosis than older patients. Those patients with more severe weakness and those who are intubated have a worse prognosis than those with milder weakness.
- Diarrhea as an antecedent association often is associated with C jejuni infection. These patients may have a more prolonged recovery.
- Early improvement in strength during treatment is associated with a more rapid recovery. Low compound muscle action potential (CMAP) amplitudes (<20% of normal) are considered a bad prognostic indicator.
- In spite of therapy with plasma exchange or IVIG, the decrease in mortality has often been attributed to improved aggressive supportive treatment than to any drug treatment. This has included close monitoring with the avoidance of hypoxia, pain, and arrhythmogenic stimuli.
- In the presence of dysautonomia, hypoxia can trigger cardiac arrhythmias. Tracheal suction can also at times result in cardiac arrhythmias. Ideally, these patients should be given extra oxygen before tracheal toilet.
- Subcutaneous heparin to avoid venous thromboembolism, treatment of pain with analgesics including narcotics, treatment of hypotension and hypertension, as the case be and treatment of severe bradyarrhythmia all go a long way in decreasing mortality. Carbamazepine and gabapentin may help.
- Persistent fatigue following Guillain-Barré syndrome is common and may be helped by a graded exercise program. C jejuni is often treated with a course of erythromycin.
- Hyponatremia is due to inappropriate antidiuretic hormone secretion (SIADH) is best managed by fluid restriction coupled by the avoidance of hyponatremic fluids. Need for immunization should be reviewed on an individual basis.
Patient Education
Guillain-Barré Syndrome Foundation International
Miscellaneous
Medicolegal Pitfalls
The main medicolegal pitfalls involve not anticipating progression of symptoms.
- This may occur when a patient who has not reached a plateau is not admitted to a hospital.
- Similarly, admitted patients require cardiac monitoring and FVC and negative inspiratory pressure testing at least 3 times daily.
Special Concerns
- Plasmapheresis and IVIg have been used in pregnant patients; however, the risks are not well documented.
- In elderly patients, arrhythmias are the most common cause of death. In addition, elderly patients have a higher complication rate.
- The Miller-Fisher variant is more common in children than in adults, representing as many as 20% of cases.
- To assess the impact of new strategies of therapy on outcomes and hospitalization charges among patients with Guillain-Barré syndrome requiring mechanical ventilation, Souayah et al compared pertinent variables between nationally representative data derived from 1992-2002.16 Their findings reveal that improvements in therapeutic strategies over that decade are not reflected in mortality, length of hospitalization, or hospital charges in the current study. Thus, this outcome may be more reflective of changing patterns of hospitalization rather than relative futility of new treatments.
- Frenzen found that the estimated annual cost of Guillain-Barré syndrome was $1.7 billion (95% CI, $1.6-1.9 billion), including $0.2 billion (14%) in direct medical costs and $1.5 billion (86%) in indirect costs. Most of the medical costs were for community hospital admissions. Most of the indirect costs were due to premature deaths. The mean cost per patient with Guillain-Barré syndrome was $318,966 (95% CI, $278,378-$359,554).17
More on Acute Inflammatory Demyelinating Polyradiculoneuropathy |
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| Differential Diagnoses & Workup: Acute Inflammatory Demyelinating Polyradiculoneuropathy |
| Treatment & Medication: Acute Inflammatory Demyelinating Polyradiculoneuropathy |
Follow-up: Acute Inflammatory Demyelinating Polyradiculoneuropathy |
| References |
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Further Reading
Keywords
acute idiopathic polyneuritis, acute inflammatory demyelinating polyneuropathy, ascending paralysis, Guillain-Barré syndrome, Guillain-Barré-Strohl syndrome, AIDP, acute inflammatory demyelinating polyradiculoneuropathy
Follow-up: Acute Inflammatory Demyelinating Polyradiculoneuropathy