High Speed Clinical Data Retrieval System with Event Time Sequence Feature

M. Kimura; S. Tani; H. Watanabe; Y. Naito; T. Sakusabe; H. Watanabe; J. Nakaya; F. Sasaki; T. Numano; T. Furuta; T. Furuta

doi:10.3414/ME9125

Methods of Information in Medicine, Table of Contents

Methods Inf Med 2008; 47(06): 560-568
DOI: 10.3414/ME9125

Original Article

Schattauer GmbH

High Speed Clinical Data Retrieval System with Event Time Sequence Feature

With 10 Years of Clinical Data of Hamamatsu University Hospital CPOE

M. Kimura

¹Hamamatsu University, School of Medicine, Hamamatsu, Japan

,

S. Tani

¹Hamamatsu University, School of Medicine, Hamamatsu, Japan

,

H. Watanabe

¹Hamamatsu University, School of Medicine, Hamamatsu, Japan

,

Y. Naito

¹Hamamatsu University, School of Medicine, Hamamatsu, Japan

,

T. Sakusabe

²Fujita Health University, School of Health Sciences, Toyoake, Japan

,

H. Watanabe

³The University of Tokyo, Dept. of Planning, Information and Management, Tokyo, Japan

,

J. Nakaya

⁴Tokyo Medical and Dental University, Information Center for Medical Sciences, Tokyo, Japan

,

F. Sasaki

⁵NEC Corporation, Tokyo, Japan

,

T. Numano

⁶NTT Data Tokai Corporation, Nagoya, Japan

,

T. Furuta

⁶NTT Data Tokai Corporation, Nagoya, Japan

,

T. Furuta

¹Hamamatsu University, School of Medicine, Hamamatsu, Japan

› Author Affiliations

Abstract

Summary

Objectives: This paper illustrates a high speed clinical data retrieving system, from 10 years of data of operating hospital information system for the purposes of research, evidence creation, patient safety, etc., even incorporating time sequence of causal relations.

Methods: Total of 73,709,298 records of 10 years at Hamamatsu University Hospital (as of June 2008) are sent from HIS to retrieval system in HL7 v2.5 format. Hierarchical variable length database is used to install them.

Results: A search for “listing patients who were prescribed Pravastatin (Mevalotin and generic drugs, any titer)” took 1.92 seconds. “Pravastatin (any) prescribed and recorded AST >150 within two weeks” took 112.22 seconds. Searching conditions can be set to be more complex, connected by Boolean operator and/or. This system called D*D is in operation at Hamamatsu University Hospital since August 2002. It is used for 48,518 times (monthly average of 703 searches). Neither searching, nor background export of data from HIS caused delay of routine operating CPOE.

Conclusions: Search database outside of routine operating CPOE, with daily export of order data in HL7 v2.5 format, is proved to provide excellent search environment without causing trouble. Hierarchical representation gives high-speed search response, especially with time sequence of events.

Keywords

Medical order entry systems - hospital information systems - evidence-based medicine - standards - clinical research

Full Text

References

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