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Abstract

An in vitro comparison of the heat exchange properties of the Electromedics D1081A, Sarns MP-4 'Conducer Coil' 165720, Bentley HE-1 00 and the Shiley BCD Plus 4:1 blood cardioplegia sets was performed. The efficiency was calculated for each heat exchanger and post-heat exchange blood path temperatures were compared.

The calculated efficiency for each heat exchanger is as follows: Electromedics D1081A at 18 I/minute coil water flow (0.95); Sarns MP-4 165720 at 9 I/minute coil water flow (0.93); Bentley HE-100 at 10 I/minute coil water flow (0.91); Shiley BCD Plus at 15 I/minute coil water flow (0.90).

Blood path, precoil temperatures for each unit were compared statistically with no differences found ( p > 0.05). Blood side, postcoil temperatures were then compared. The average postcoil blood path temperature of the Electromedics D1081A was 1.6° ± 0.1 °C, of the Sarns MP-4 165720 it was 2.1 ± 0.1°C, of the Bentley HE-100 it was 2.7° ± 0.3°C, and the Shiley BCD Plus 3.0° ± 0.4°C.

The results of this experiment indicate that the average postcoil temperature of the Electromedics D1081 A was lower than the Sarns MP-4 165720 (p < 0.05) which was lower than that of the Bentley HE-100 (p < 0.05) and Shiley BCD Plus (p < 0.05). No statistical difference was found between the average postcoil temperature of the Bentley HE-1 00 and the Shiley BDC Plus.

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References

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Ary D. , Jacobs LC Introduction to statistics. New York: Holt, Rinehart, and Winston, 1976.

12.

(a) BCD Plus 4:1, Shiley Labs Inc., Irvine, CA 92714, USA

13.

(b) HE-100 4:1, American Bentley Inc., Irvine, CA 92714, USA

14.

15.

(d) MP-4 165720, Sarns Inc., Ann Arbor, MI 48103, USA

16.

(e) CAPS, Shiley Labs Inc., Irvine, CA 92714, USA

17.

(f) Model no. 11160, Sarns Inc., Ann Arbor, MI 48103, USA

18.

(g) Bypass 70, tubing, American Bentley Inc., Irvine, CA92714, USA

19.

(h) Model TM-2100, Electromedics Inc., Englewood, CO 80112,USA

20.

(i) Model 2124, 2100 Series, Electromedics Inc., Englewood, CO 80112, USA

21.

(j) Series 400, Yellow Springs Instrument Co., Yellow Springs, OH 48307, USA

Determination and comparison of heat exchange efficiency of four commercially available blood cardioplegia sets

Abstract

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