Non-organic stridor in children

Functional Outcomes after Behavioral Treatment of Paradoxical Vocal Fold Motion in Adults

OBJECTIVE

Paradoxical vocal fold motion (PVFM) is responsive to behavioral therapy, often resulting in a remission of symptoms, but little is known about whether treatment is beneficial with regard to PVFM-associated psychological symptoms or functional limitations. The goal of the study was to identify patient perceptions of the impact of treatment for PVFM and characteristics associated with treatment outcomes.

METHODS

A survey was conducted of all adults who had received at least 1 session of treatment for PVFM in our outpatient clinic over a 2-year period.

RESULTS

The 39 participants ranged in age from 18 to 82 and had received a median of 3 treatment sessions. At a median follow-up of 10 months following treatment, respondents reported improvements in a wide range of areas, including sports and leisure, daily activities, and social participation. The majority reported improvements in feelings of anxiety, helplessness, and control. Poorer outcomes were associated with more severe voice symptoms, fewer treatment sessions, and needing oral steroids for asthma control.

CONCLUSION

There was a reduction in a wide range of activity limitations after treatment. Feelings of control were strongly associated with positive outcomes. The therapy appeared to be equally effective for adults with exercise-induced and environmental variants of PVFM.

Hysterical Stridor: A Report of Two Cases

Stridor as an initial symptom of a conversion reaction (hysteria) is rare. We report cases of hysterical stridor in two older women, unrelated and unacquainted, from the same rural community in Oman. Once the diagnosis was made, both patients were successfully treated with a single dose of an anxiolytic. We also review the literature on hysterical stridor and discuss the diagnostic dilemmas and therapeutic options.

Psychogenic Respiratory Distress: A Case of Paradoxical Vocal Cord Dysfunction and Literature Review

BACKGROUND: Pulmonary disease such as asthma is a psychosomatic disorder vulnerable to exacerbations precipitated by psychological factors. A case is described in which a patient thought to have treatment-refractory asthma was discovered to have a conversion reaction, specifically paradoxical vocal cord dysfunction (PVCD), characterized by abnormal vocal cord adduction during inspiration. DATA SOURCES: Reports of PVCD were located using a MEDLINE search and review of bibliographies. MEDLINE (English language only) was searched from 1966 through December 1998 using the terms functional asthma, functional upper airway obstruction, laryngeal diseases, Munchausen's stridor, paradoxical vocal cord dysfunction, psychogenic stridor, respiratory stridor, vocal cord dysfunction, and vocal cord paralysis. A total of 170 cases of PVCD were reviewed. STUDY FINDINGS: PVCD appears to be significantly more common among females. PVCD spans all age groups, including pediatric, adolescent, and adult patients. PVCD was most often misdiagnosed as asthma or upper airway disease. Because patients present with atypical and/or refractory symptoms, several diagnostic tests are employed to evaluate patients with PVCD; laryngoscopy is the most common. Direct visualization of abnormal vocal cord movement is the most definitive means of establishing the diagnosis of PVCD. A number of psychiatric disturbances are related to PVCD, including conversion and anxiety disorders. PVCD is associated with severe psychosocial stress and difficulties with modulation of intense emotional states. CONCLUSIONS: Psychogenic respiratory distress produced by PVCD can be easily misdiagnosed as severe or refractory asthma or other pulmonary disease states. Recognition of PVCD is important to avoid unnecessary medications and invasive treatments. Primary care physicians can detect cases of PVCD by attending to clinical symptoms, implementing appropriate laboratory investigations, and examining the psychological covariates of the disorder. Psychotherapy and speech therapy are effective in treating most cases of PVCD.

Hysterical stridor: a benign cause of upper airway obstruction

We present the cases of three patients with stridor that resolved spontaneously. Paradoxical vocal cord motion was documented in one patient. Normal vocal cord motion was present in the other two patients, but stridor had resolved in both cases. Many different terms have been used to describe this entity in the literature. Emergency physicians must recognize the subtle signs of hysterical stridor. Once more serious etiologies are ruled out, sedation and reassurance instead of aggressive airway intervention are required for this benign condition.