Echocardiography-derived Pre-induction Hemodynamic Phenotypes and Post-induction Hypotension: an Exploratory Clustering Analysis
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Enrollment
- 64
- Locations
- 1
- Primary Endpoint
- Pre-induction hemodynamic phenotype classification
Study Overview
Brief Summary
This study evaluated the occurrence of post-induction hypotension (PIH) in patients undergoing elective surgery under general anesthesia. PIH is a common perioperative complication associated with adverse outcomes.
Using previously collected clinical and echocardiographic data, the study explored the relationship between pre-induction hemodynamic status and the risk of developing PIH.
The findings may help improve preoperative risk stratification and support more individualized perioperative hemodynamic management.
Detailed Description
Post-induction hypotension (PIH) was recognized as a common and clinically significant complication associated with adverse perioperative outcomes. This study was conducted as a retrospective analysis of prospectively collected data from adult patients undergoing elective surgery under general anesthesia.
The objective was to evaluate whether pre-induction hemodynamic status, assessed using echocardiographic parameters and routine clinical variables, was associated with the occurrence and timing of PIH. The analysis focused on identifying distinct hemodynamic profiles reflecting underlying cardiovascular physiology.
Unsupervised clustering (k-means) was applied to pre-induction variables to identify phenotypes, and principal component analysis was used to explore variable contributions. Latent profile analysis was performed as a sensitivity analysis. The association between phenotypes and PIH was assessed using time-to-event analysis.
No additional interventions were performed, and patient management was not influenced by the study. All analyses were conducted on anonymized data.
This study aimed to improve the understanding of variability in hemodynamic responses to anesthesia induction and to support future strategies for individualized perioperative care.
Study Design
- Study Type
- Observational
- Observational Model
- Cohort
- Time Perspective
- Prospective
Eligibility Criteria
- Ages
- 50 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Patients scheduled for elective abdominal surgery under genral anesthesia.
Exclusion Criteria
- •patients with dyspnoea
- •unstable angina,
- •severe valvular heart disease
- •anticipated or unanticipated difficult airway management
- •suspected increased intra-abdominal pressure
- •poor echogenicity.
Arms & Interventions
Overall Study Cohort
Adult patients undergoing elective surgery under general anesthesia included in a retrospective analysis of prospectively collected data.
Outcomes
Primary Outcomes
Pre-induction hemodynamic phenotype classification
Time Frame: pre-induction, before administration of general anesthesia: from admission to the operating to induction of general anesthesia
Pre-induction hemodynamic phenotypes were derived using unsupervised clustering of clinical and echocardiographic variables obtained prior to anesthesia induction.
Pre-induction hemodynamic phenotype classification
Time Frame: Baseline (pre-induction, before administration of general anesthesia)
Pre-induction hemodynamic phenotypes were derived using unsupervised clustering of clinical and echocardiographic variables obtained prior to anesthesia induction.
Secondary Outcomes
No secondary outcomes reported
Investigators
Younes Aissaoui, MD
Professor of critical care and anesthesiology
Avicenna Military Hospital