Clinical trial NCT06508112: Pleth Variability Index in Pulmonary Embolism
Official title: Pleth Variability Index: A Potential New Marker for Predicting the Mortality of Pulmonary Embolism?
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Pulmonary Embolism
Keywords: pulmonary embolism
Perfusion Index
Plethysmography
mortality
Lead sponsor: Suleyman Demirel University
Sponsor class: OTHER
First posted: 2024-07-18
Enrollment: 1
Sex: ALL
Minimum age (years): 18
Maximum age (years): 93
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: CASE_CONTROL
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patients over the age of 18 who presented to the emergency department of a tertiary care hospital between April 1, 2023, and March 31, 2024, with complaints of cough, dyspnea, chest pain, tachycardia, hemoptysis, and syncope, and were diagnosed with PE confirmed by pulmonary computed tomographic angiography (CTPA), were included in our study. Informed consent was obtained from the patients who were stable and from the relatives of the patients who were unstable.

Brief summary: Pulmonary embolism(PE) is a ventilation/perfusion disorder caused by obstruction of the pulmonary artery, usually by a thrombus. The Pleth Variability Index(PVI) is a continuous, noninvasive indicator of dynamic perfusion index changes in photoplethysmography that occur in at least one respiratory cycle. The aim of this study is to evaluate the prognostic and mortality indicator role of PVI in patients with PE, hypothesizing that PVI could serve as a valuable guide in this disease where perfusion impairment is fundamental.

Based on our study, we determined that PVI could be a non-invasive, rapid, and objective tool for predicting disease progression and mortality in PE patients in the emergency department. Our study is the first to evaluate the PVI in PE.

Detailed description: Pulmonary embolism(PE) is a ventilation/perfusion disorder caused by obstruction of the pulmonary artery, usually by a thrombus. The Pleth Variability Index(PVI) is a continuous, noninvasive indicator of dynamic perfusion index(PI) changes in photoplethysmography that occur in at least one respiratory cycle. The aim of this study is to evaluate the prognostic and mortality indicator role of PVI in patients with PE, hypothesizing that PVI could serve as a valuable guide in this disease where perfusion impairment is fundamental.

In the emergency department, data were recorded for patients over 18 years of age diagnosed with pulmonary embolism, demographic data, risk scores and measurements. PVI and PI values were analyzed across different scoring systems, hospitalization statuses, and mortality groups. A survival analysis was conducted to evaluate the impact of PVI and PI on 1-year mortality in patients. The study was assessed with the STROBE checklist.

A total of 49 patients were included in this prospective, single-center study. The PVI value was significantly higher, whereas the PI value was significantly lower in the exitus group compared to the living group (p=0.027, p=0.011). The area under the curve values for PVI, pulmonary embolism severity index (PESI) score, and PI were determined to be 0.714, 0.820, and 0.745, respectively. It was observed that the negative predictive value of PESI was 100%, while the positive predictive value of PVI was the highest at 53.5%. In the. The mean survival time was significantly shorter for patients with PVI \>40 and PI \<1.9 (p=0.001, p=0.002). An increase in PVI was associated with a 4.04-fold increase in the risk of death (HR: 5.04, 95% CI: 1.50-16.92, p=0.009).

PVI can be considered a noninvasive, rapid, and objective tool for predicting the course and mortality of the disease in PE patients in the emergency department. Our study is the first to evaluate the PVI in PE.

Eligibility criteria: Inclusion Criteria:

* To be over 18 years old
* Diagnosis of pulmonary embolism

Exclusion Criteria:

* patients had asthma and chronic obstructive pulmonary disease exacerbation
* patients had acute decompensated heart failure
* patients were pregnant
* patient was under 18 years old

Primary outcomes:
measure: Pleth Variability Index: A Potential New Marker for Predicting the Mortality of Pulmonary Embolism?
timeFrame: 1 year
Secondary outcomes:
Other outcomes:
Locations:
city: Isparta
country: Turkey
facility: Suleyman Demirel University Faculty of Medicine
Study officials:
affiliation: suleyman demirel university faculty of medicine
name: Teslime Eryavuz Şengül, M.D.
role: PRINCIPAL_INVESTIGATOR
affiliation: suleyman demirel university faculty of medicine
name: Hamit H Armağan, assoc prof
role: STUDY_DIRECTOR
affiliation: suleyman demirel university faculty of medicine
name: Furkan Ç Oğuzlar, asst prof
role: STUDY_CHAIR
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