O2 Versus CPAP Treatment Of Patients Undergoing SIPE Therapy (OCTOPUS)

Lung Diseases Clinical Trial

— OCTOPUS  

Official title:

Evaluation of Continous Positive Airway Pressure (CPAP) in Swimming Induced Pulmonary Edema (SIPE) -a Randomized Single-blinded Controlled Study

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT04307615
• Other study ID #: OCTOPUS001
• Status: Recruiting
• Phase: N/A
• Start date: July 2, 2022
• Est. completion date: July 15, 2025

Study information

• Verified date: January 2024
• Source: Dalarna County Council, Sweden
• Contact: Maria Hårdstedt, MD/PhD
• Phone: 46-738089464
• Email: maria.hardstedt[@]regiondalarna.se
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

In swimming induced pulmonary edema (SIPE), there is a lack of knowledge regarding optimal treatment. The present study was designed to assess the benefit of continuous positive airway pressure (CPAP) compared to oxygen as a first line treatment of SIPE in the out-of-hospital environment.

Description:

Swimming induced pulmonary edema (SIPE) is an unusual condition affecting otherwise healthy swimmers. SIPE is characterized by acute onset of dyspnea and cough, excessive sputum and occasionally hemoptysis when swimming in open water. The condition usually resolves spontaneously within 48 hours, but may result in serious illness and require emergency care. Case reports describe acute treatment with oxygen alone or in combination with diuretics, beta-agonist-inhalation or continuous positive airway pressure (CPAP). Evidence for optimal treatment strategy is lacking. This study intends to determine whether oxygen alone or applied together with CPAP leads to improvement of oxygen saturation and recovery of patients. The aim is to treat patients on site without involving hospital care. We study a large cohort of approximately 12 000 swimmers during Vansbrosimningen, Sweden's biggest annual open water event with a yearly incidence of SIPE about 0,4%.

Adult patients clinically diagnosed with SIPE are randomly assigned in 2 groups receiving treatment during 20 minutes: (1) oxygen 10l/min or (2) oxygen 10l/min and CPAP 7,5 cm H2O. Assessment with outcome measures is taken 10 minutes after treatment. Primary endpoint: oxygen saturation (%) by pulse oxymetry.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 90
• Est. completion date: July 15, 2025
• Est. primary completion date: July 15, 2025
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• clinical diagnosis of swimming induced pulmonary edema (SIPE) with need of acute treatment (oxygen saturation =91%)

• 18 years and older

• informed consent

Exclusion Criteria:

• declined consent

• suspected acute coronary syndrome

• severe asthma diagnosed together with pulmonary edema where beta-agonist-inhalation is needed prior to treatment of pulmonary edema

• hemodynamic instability or decreased consciousness

Related Conditions & MeSH terms

• Edema
• Lung Diseases
• Pulmonary Edema
• Swimming Induced Pulmonary Edema (SIPE)

Intervention

Combination Product:
• Oxygen + continuous positive airway pressure (CPAP)
Oxygen-driven CPAP (7,5 cmH2O): 20 min treatment followed by 10 min rest and assessment

Drug:
• Oxygen
Oxygen: 20 min treatment followed by 10 min rest and assessment

Locations

Country	Name	City	State
Sweden	Center of Clinical Research Dalarna	Falun

Sponsors (1)

Lead Sponsor	Collaborator
Dalarna County Council, Sweden

Country where clinical trial is conducted

Sweden, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Absolute peripheral oxygen saturation (%) after treatment	Peripheral oxygen saturation % (continuous variable) measured by peripheral pulse oximetry	after 20 min treatment followed by 10 min rest
Secondary	Change in absolute peripheral oxygen saturation (%) before and after treatment	Change in peripheral oxygen saturation % (continuous variable) measured by pulse oximetry before and after treatment	change before versus after 20 min treatment followed by 10 min rest
Secondary	Recovery (yes/no) after treatment	Recovery, defined by "peripheral oxygen saturation >95% after treatment" or no recovery, defined by "peripheral oxygen saturation =95% after treatment"	after 20 min treatment followed by 10 min rest
Secondary	Interstitial syndrome assessed by lung ultrasound (yes/no) after treatment	Four chest regions for both lungs are scanned by lung ultrasound; a positive region defined by the presence of three or more B-line artifacts. Bilateral or unilateral presence of two or more positive regions define positive interstitial syndrome.	after 20 min treatment followed by 10 min rest
Secondary	Absolute number of regions presenting B-lines on lung ultrasound after treatment	Four chest regions for both lungs are scanned by lung ultrasound; a positive region defined by the presence of three or more B-line artifacts. Assessment of the total number of positive regions.	after 20 min treatment followed by 10 min rest
Secondary	Change in absolute number of regions presenting B-lines on lung ultrasound before and after treatment	Four chest regions for both lungs are scanned by lung ultrasound; a positive region defined by the presence of three or more B-line artifacts. Assessment of the total number of positive regions. Change in absolute number of regions presenting B-lines on lung ultrasound before and after treatment	change before versus after 20 min treatment followed by 10 min rest
Secondary	Change in patient reported outcome measures before and after treatment	Six different patient reported outcome measures assessed by numeric rating scale (NRS) 0-10: cough, sputum, air hunger, breathing effort, tightness in chest, anxiousness. The patients will assess symptoms prior to and after treatment.	change before versus after 20 min treatment followed by 10 min rest
Secondary	Admission to hospital (yes/no)	admission to hospital within or after a maximal treatment time of 40 minutes followed by 20 min rest.	2 hours
Secondary	total treatment time	total treatment time until oxygen saturation =96% is reached.	2 hours
Secondary	subgroup analysis	treatment outcome analysis in patients with different baseline oxygen saturation on admission	1 hour