Journal of Anesthesia

, Volume 25, Issue 6, pp 864–871

Impact of remifentanil introduction on practice patterns in general anesthesia

  • Kanji Uchida
  • Hideo Yasunaga
  • Hiroaki Miyata
  • Masahiko Sumitani
  • Hiromasa Horiguchi
  • Ken Kuwajima
  • Shinya Matsuda
  • Yoshitsugu Yamada
Original Article



The introduction of new medicine can change clinical practice patterns and may affect patient outcomes. In the present study, we investigated whether introduction of remifentanil in Japan affected the practice patterns of anesthesia.


Using the Japanese Diagnosis Procedure Combination database, we extracted records of 423,491 patients who underwent surgery with general anesthesia in 243 hospitals before (2006) and after (2007) the introduction of remifentanil, and identified anesthetic agents used for each patient. A hierarchical mixed-effects logistic regression analysis was performed to analyze the factors that affected selection of remifentanil. Further, we compared postoperative length of stay (LOS), in-hospital mortality, and total costs between 2006 and 2007.


In 2007, remifentanil was used for up to 41.4% of all general anesthesia, accompanied by a reduction in nitrous oxide use and an increase in total intravenous anesthesia. Female gender, increasing age, and preoperative comorbidities including diabetes mellitus, hypertension, liver cirrhosis, and chronic renal failure were positively associated with the use of remifentanil, whereas accompanying cardiac disease and co-application of epidural anesthesia were negatively associated. In 2007, a similar in-hospital death rate, similar or decreased total costs, slightly reduced duration of anesthesia, and substantially reduced postoperative LOS were seen compared to those in 2006.


Our data revealed rapid changes in practice patterns in anesthesia after the introduction of remifentanil in Japan. Remifentanil was used more often in patients with comorbidities and without epidural anesthesia, and its introduction did not affect increase in total medical costs.


Remifentanil Anesthetic practice Postoperative outcome In-patient medical cost 

Supplementary material

540_2011_1221_MOESM1_ESM.doc (48 kb)
Supplemental Table 1 (DOC 48 kb)
540_2011_1221_MOESM2_ESM.doc (44 kb)
Supplemental Table 2 (DOC 44 kb)


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Copyright information

© Japanese Society of Anesthesiologists 2011

Authors and Affiliations

  • Kanji Uchida
    • 1
  • Hideo Yasunaga
    • 2
  • Hiroaki Miyata
    • 3
  • Masahiko Sumitani
    • 1
  • Hiromasa Horiguchi
    • 2
  • Ken Kuwajima
    • 1
  • Shinya Matsuda
    • 4
  • Yoshitsugu Yamada
    • 1
  1. 1.Department of AnesthesiologyTokyo University Graduate School of MedicineTokyoJapan
  2. 2.Department of Health Management and PolicyTokyo University Graduate School of MedicineTokyoJapan
  3. 3.Department of Health Quality AssessmentTokyo University Graduate School of MedicineTokyoJapan
  4. 4.Department of Preventive Medicine and Community HealthUniversity of Occupational and Environmental HealthKitakyushuJapan

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