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Related Experiment Video

Updated: May 31, 2026

Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
08:49

Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention

Published on: October 16, 2013

Estimating anesthesia time using the medicare claim: a validation study.

Jeffrey H Silber1, Paul R Rosenbaum, Orit Even-Shoshan

  • 1Center for Outcomes Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA. silberj@wharton.upenn.edu

Anesthesiology
|July 2, 2011
PubMed
Summary

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Various sedation levels offer significant advantages in facilitating procedural interventions for patients undergoing medical or invasive surgical procedures. These levels span from anxiolysis to general anesthesia, providing a spectrum of sedative effects to cater to specific patient needs. Anxiolysis reduces anxiety and is achieved through minimal sedation, enabling patients to remain awake and responsive while feeling more at ease during the procedure. This level can benefit minor...

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Medicare anesthesia claims accurately estimate surgical procedure length. This method allows for large-scale quality of care studies, though outlier data requires careful handling.

Area of Science:

  • Health Services Research
  • Surgical Quality Improvement
  • Health Informatics

Background:

  • Procedure length is a critical indicator of healthcare quality, but large-scale studies are infrequent.
  • Estimating surgical procedure duration from anesthesia claims offers a scalable solution for quality assessment.

Purpose of the Study:

  • To validate the use of anesthesia claims data for estimating surgical procedure length.
  • To assess the feasibility of large-scale analysis of surgery times using Medicare claims.

Main Methods:

  • The Obesity and Surgical Outcomes Study analyzed data from 15,914 patients across 47 hospitals, comparing detailed chart abstraction times (induction, cut, close, recovery) with anesthesia Medicare Part B claims.
  • Statistical analysis included correlation and median absolute difference calculations to compare chart-derived times and claim-derived times.

Related Experiment Videos

Last Updated: May 31, 2026

Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
08:49

Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention

Published on: October 16, 2013

Main Results:

  • Analysis of 14,369 patients revealed a strong Spearman correlation (0.94) between chart and claim times.
  • The median absolute difference in procedure length estimation was minimal, at only 5 minutes.

Conclusions:

  • Medicare anesthesia claims are a valuable and accurate data source for large-scale surgical procedure time analysis in the United States.
  • Potential errors in chart abstraction and claims data necessitate careful handling of outliers for reliable research.