Postoperative Conversion Disorder Presenting as Inspiratory Stridor and Hemiparesis in a Pediatric Patient

An Unusual Case of Post-Operative Functional Stridor After Emergence From General Anesthesia

Post-anesthesia stridor due to laryngospasm, laryngeal edema, or any other organic cause is a life-threatening condition requiring immediate intervention. The very rare functional stridor or psychogenic stridor following emergence from general anesthesia may sometimes mimic stridor due to an organic cause, but it is neither fatal nor require immediate airway management. However, if the condition is not diagnosed timely, it may lead to unnecessary manipulation of the airway, such as endotracheal intubation or tracheostomy. We report herein a case of functional stridor in a 48-year-old woman who underwent abdominal-perineal resection for carcinoma rectum. The case was timely diagnosed by the attending anesthetist, and the patient recovered spontaneously, thus avoiding any unindicated airway handling and its associated complications.

Anaesthesia and the development of functional neurological disorder: A systematic review and case series

OBJECTIVE

There are reports of functional neurological disorder (FND) developing after anaesthesia, though separating any aetiological role from other possible factors is challenging. We aimed to systematically review all published cases of post-anaesthetic FND to see if any common factors supported an anaesthetic role. We also aimed to identify all cases of post-anaesthetic FND arising in our FND clinic, to obtain an estimate of its frequency.

METHODS

For the review, a systematic search for published cases of FND developing within 48 h of anaesthesia was conducted in June 2022. For the case series, the medical records of all patients attending an FND clinic in Melbourne between 2017 and 2019 were examined, and all cases with FND within 48 h of anaesthesia extracted.

RESULTS

36 published cases were identified for the review. Sixteen described preceding stressors and 16 psychiatric diagnoses, including 8 with previous FND. Thirty-two (92%) had undergone general anaesthesia, most commonly for obstetric procedures. Motor/sensory loss was the most common presentation, followed by seizures and coma. Most (80.5%) developed symptoms immediately on induction or cessation of anaesthesia. For the case series, 8 of 107 clinic patients (7.5%), developed FND within 48 h of anaesthesia. All had previous psychiatric diagnoses, including 3 with previous FND. Three underwent general anaesthesia and 3 procedural sedation, with seizures the most common presentation. All developed symptoms immediately on induction or cessation of anaesthesia.

CONCLUSION

These cases provide some support for an aetiological role for anaesthesia: there is evidence for an anaesthetic 'model' for the symptoms of FND that arise, they largely arise with the onset or termination of anaesthesia, and they arise most frequently during general anaesthesia or sedation.

A case of hyperventilation leading to apnea and desaturation in PACU

Background

Respiratory adverse events are not uncommon in the post-anesthesia care unit (PACU) following general anesthesia. In this regard, hyperventilation leading to apnea and desaturation is a rare entity. Here we have reported a case of a 15-year-old girl who, following an uneventful general anesthesia, developed severe hyperventilation leading to apnea and desaturation in the PACU.

Case presentation

The 15-year-old girl underwent cortical mastoidectomy under general anesthesia. After a smooth anesthesia and an uneventful early recovery, she developed hyperventilation after about 15 min in the PACU. The symptom was severe enough to lead to apnea, desaturation and severe respiratory alkalosis. She required bag and mask ventilation and the symptoms resolved only transiently with propofol sedation. Finally, she responded to intravenous haloperidol and did not have any further episode after receiving haloperidol.

Conclusion

Hyperventilation after a smooth recovery from anesthesia is not a common presentation. In this article we have tried to discuss the possible cause of such symptom in our patient and how we successfully managed this case. We have also proposed an algorithmic approach to diagnose and manage such cases in the PACU.