Platypnea-orthodeoxia syndrome mimicking postural orthostatic tachycardia syndrome

Cutsforth‐Gregory, Jeremy K.; Benarroch, Eduardo E.; Lamotte, Guillaume

doi:10.1007/s10286-021-00805-6

Cited by 1 publication

(1 citation statement)

References 13 publications

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“…POS has no clear diagnostic criteria. Based on the lit-erature review, possible criteria include: (1) decreased noninvasive oxygen saturation in the upright position and recovered in the supine position [4]; (2) Arterial PO 2 was significantly lower in the upright position compared to the supine position [5].…”

Section: Discussionmentioning

confidence: 99%

Intraoperative Hypoxemia in the Right Lateral Decubitus Position: A Case Report

Wu,

2024

IJACM

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Platypnea-Orthodeoxia syndrome (POS), an exceptionally uncommon condition, is characterized by decreased oxygen saturation in an upright posture with corresponding improvement in the supine position. Recently, an 85-year-old female patient presented for surgery due to a left femoral neck fracture. Following successful tracheal intubation and anesthesia induction, the ventilator indicated an airway pressure of 15mmHg. While in the right lateral decubitus position, the patient developed hypoxia despite normal arterial blood pressure and symmetrical breath sounds. Attempts to alleviate the hypoxia through pure oxygen ventilation, tympanic lung ventilation, and high-frequency ventilation were unsuccessful. Subsequently, there was a notable decrease in both blood pressure and heart rate, prompting an immediate halt to the surgery and repositioning the patient to the supine position. This resulted in the normalization of the patient's heart rate, oxygen saturation, and blood pressure. To investigate the etiology, a TEE probe was inserted, revealing the presence of a patent foramen ovale (PFO) and a significant right-to-left shunt while the patient was in the lateral position. The procedure was performed in a specific right lateral decubitus position. This case may represent a unique manifestation of POS syndrome, expanding the differential diagnosis for intraoperative position-related hypoxemia. Given the severe hypoxemia observed with intraoperative positional changes, a strong suspicion of POS syndrome is warranted.

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Section: Discussionmentioning

confidence: 99%

Intraoperative Hypoxemia in the Right Lateral Decubitus Position: A Case Report

Wu,

2024

IJACM

View full text Add to dashboard Cite

show abstract

Platypnea-orthodeoxia syndrome mimicking postural orthostatic tachycardia syndrome

Cited by 1 publication

References 13 publications

Intraoperative Hypoxemia in the Right Lateral Decubitus Position: A Case Report

Intraoperative Hypoxemia in the Right Lateral Decubitus Position: A Case Report

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