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Journal of Parenteral and Enteral Nutrition
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Stress Induced by Light Weight Back Button Used to Prepare the Rat for Continuous Intravenous Infusion

Ronald H. Birkhahn, Ph.D.

From the Department of Surgery, Medical College of Ohio at Toledo, Toledo, Ohio 43699

Calvin L. Long, Ph.D.

From the Department of Surgery, Medical College of Ohio at Toledo, Toledo, Ohio 43699

David Fitkin, B.A.

From the Department of Surgery, Medical College of Ohio at Toledo, Toledo, Ohio 43699

William S. Blakemore, M.D.

From the Department of Surgery, Medical College of Ohio at Toledo, Toledo, Ohio 43699

A light weight plastic back button used to secure a metal catheter protector to the rat's back was tested as a stressful force on the rat. The results demonstrate that the button does indeed produce a stress that is apparent from abnormal weight gain. In young rats, 150 to 180 g, the stress was alleviated by overnight fasting prior to placement of the button; older animals, 350 g, displayed an exaggerated response to its placement. While the younger rats gained weight more slowly than controls, the older animals lost weight daily for 5 days. It is our conclusion that, while the back button has many advantages over the more popular harness, the button also induces stress. Consequently, control animals should wear a button even if they are not infused.

Journal of Parenteral and Enteral Nutrition, Vol. 3, No. 6, 421-423 (1979)
DOI: 10.1177/014860717900300603
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Home page
 JPEN J Parenter Enteral NutrHome page
H. Takeyama, J. Yura, H. Miyaike, M. Ishikawa, H. Mizuno, M. Taniguchi, T. Hanai, A. Mizuno, N. Shinagawa, and F. Kato
A New Apparatus for Chronic Intravenous Infusion in Unrestrained Rats
JPEN J Parenter Enteral Nutr, January 1, 1988; 12(1): 93 - 99.
[Abstract] [PDF]