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RecruitingNCT06404892Updated May 6, 2025

ARISCAT, ASA and LAS VEGAS Risk Scores and the Incidence of Postoperative Pulmonary Complications in Thoracic Surgery

An observational study in Postoperative Complications, sponsored by Hospital Nossa Senhora da Conceicao. Recruiting at 1 site in Brazil. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-05-06.

Sponsored by Hospital Nossa Senhora da Conceicao · Observational

From the registry’s dates

  • Primary completion was expected by Dec 2025, 11 months ago, but the record still lists the study as recruiting.
  • Started Jul 2024; still recruiting 2 years 4 months later.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
110
Ages
18 Years and older
Sex
All
01

Study summary

Postoperative pulmonary complications (PPC) are among the main complications after the anesthetic-surgical procedure. It can be said that thoracic surgery results in impaired respiratory function in the postoperatively, due to the decrease in lung volumes and capacities (the vital capacity decreases by approximately 50-60% and functional residual capacity decreases by approximately 30% in the first 24 hours after surgery) diaphragm dysfunction, gas exchange impaired, cough and ineffective mucociliary clearance. Thus, our hypothesis is that the application of preoperative risk scores normally used for non-cardiac and non-thoracic surgeries may be effective on the predictability of the occurrence of CPP in patients undergoing ventilation single-lung. This is a prospective observational study in order to evaluate the performance of the ASA, ARISCAT and LAS VEGAS risk scores for predict the occurrence of postoperative pulmonary complications (PPC) in patients undergoing thoracic surgery with single-lung ventilation.

Read the detailed description

Postoperative pulmonary complications (PPC) are among the main complications after the anesthetic-surgical procedure; CPP prolong hospital stay and increase costs in health systems. It can be said that thoracic surgery results in impaired respiratory function in the postoperatively, due to the decrease in lung volumes and capacities (the vital capacity decreases by approximately 50-60% and functional residual capacity decreases by approximately 30% in the first 24 hours after surgery) diaphragm dysfunction, gas exchange impaired, cough and ineffective mucociliary clearance.

Thus, our hypothesis is that the application of preoperative risk scores normally used for non-cardiac and non-thoracic surgeries may be effective in the predictability of the occurrence of CPP in patients undergoing ventilation single-lung. In this study, we will prospectively evaluate the performance of ASA, ARISCAT and LAS VEGAS scores in predicting patients who present with CPP in thoracic surgeries using single-lung ventilation. We will also analyze other potential patient risk factors as well as complications presented.

This is a prospective observational study. Data will be collected using a standardized form at the surgical center of Hospital Nossa Senhora da Conceição and at the Hospital de Clínicas de Porto Alegre, evaluated preoperatively, intraoperatively and postoperatively. Direct observation and recording of variables studied by the anesthesiology medical team of both hospitals, previously trained and supervised by the main researcher. Patients will be monitored until hospital discharge or up to a maximum period of 30 days of hospital admission.

02

Conditions studied

  • Postoperative Complications

Keywords

  • postoperative pumonary complications
  • ARISCAT score
  • LAS VEGAS score
  • ASA score
03

In context

Postoperative Complications

1,332 studies on the registry are indexed under Postoperative Complications; 311 are open to participants now.

This study's planned enrollment of 110 is below the median of 251 across 537 observational studies indexed under Postoperative Complications.

Browse Postoperative Complications studies →

Lead sponsor

Hospital Nossa Senhora da Conceicao is the lead sponsor of 21 studies on the registry; 5 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Probability sample

Study population

Adult patients undergoing any thoracic procedure associated with intraoperative use of single-lung ventilation.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Adult patients undergoing any thoracic procedure associated with intraoperative single-lung ventilation.

Exclusion criteria

Exclusion Criteria:

  • Patients undergoing cardiac surgery, pregnant women, patient refusal, to proposed surgical, anesthetic or analgesic techniques, sepsis, psychiatric illness, uncontrolled endocrine, kidney or liver disease and coagulopathies.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
110 participants (estimated)
Patient registry
No

Groups and cohorts

  • Group 1

    Patients undergoing thoracic surgery and single-lung ventilation.

    Procedure: Single-lung ventilation

Interventions

  • ProcedureSingle-lung ventilation

    Patients undergoing thoracic surgery and intraoperative single-lung ventilation.

06

What researchers measure

Primary outcomes

  1. Postoperative pulmonary complications

    Incidence of composite pulmonary complications after surgery

    Time frame: up to 30 days after surgery

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 6, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06404892
Lead sponsor
Hospital Nossa Senhora da Conceicao
Responsible party
Andre Prato Schmidt (Anesthesiologist, Hospital Nossa Senhora da Conceicao) — Principal investigator
First posted
May 8, 2024
Start date
Jul 1, 2024
Primary completion
Dec 1, 2025 (estimated)
Completion
Dec 31, 2025 (estimated)
Last update
May 6, 2025

Study contacts

Andre P Schmidt, MD
Contact
aschmidt@ghc.com.br
5551996412212
Rejane Piantamar
Contact
prejane@ghc.com.br
555133572419
Andre P Schmidt, MD
principal investigator · Hospital Nossa Senhora da Conceição

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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