UNANES'IH I'TIZI'.I) POIKIT.OTHRRMIC DOG— KELLER 



71 



2.0 

 45 

 44 



43 

 42 

 4 I 

 40 

 39 

 38 

 37 

 36 

 35 

 S 34 



^33 



_i 

 < 32 



H 



" 3 I 



UJ 



Q: 30 

 29- 

 28- 

 27- 

 26 

 25 



CALORIES PER 

 1.8 1.6 1.4 



KILOGRAM OF DOG PER HOUR 

 L2 1.0 0.8 0.6 0.4 0.2 



I I I I 



PREOPERATIVE 



I I I I I 



-DOG 44 



X-, 



V^ff^fJ//ff^^^/XJf?^f/f/?ff////lff/////»J 



J I L_J L_L 



7:zr 



26*c; 



'DOG 337 ^3*C; 



2 3 4 5 6 



HOURS 



45 



44 



43 



42 



4 I 



40 



39 



38 



37 



36 



35 



34 



33 



32 



3 I 



30 



29 



28 



27 



26 



25 



Fig. 8. — Cooling curves and heat production values for different body temperatures, graphed 

 as bars, for Dog i^l , evidencing retention of both non-shivering and shivering heat production 

 in remnantal amounts. The presence of shivering is indicated by stippling in the cooling curve 

 and by cross hatching in the heat production bar. 



The circled point is the preoperative basal heat production value for this particular dog. See 

 text for further reference. 



Renal^ All procedures were carried out in the post-absorptive state. H}-po- 

 thermia was induced by subjecting the animal to an ambient temperature of 3° C. 

 until deep colonic temperature was reduced to the desired level, after which the 

 animal was moved to a room held at 20 to 22° C. Body temperature remained at a 

 reasonably constant level during the time that renal clearances were determined. 

 Clearances at different body temperatures were done on different days with no less 

 than 5-day intervals. Laboratory procedures have been described in detail elsewhere.^ 



Glomerular filtration rate and effective renal plasma flow were determined in 

 5 dogs and Tm PAH in 4 dogs, all of which retained varying degrees of remnantal 

 physiological resistance to hypothermia but not sufficient in magnitude to prevent a 

 progressive hypothermia from developing when exposure to cold was sufficiently 

 prolonged. 



t The author is indebted to Lt. Ivan T. Alader for renal function assessments. 



