HANDLING OF RADIOISOTOPES WITH ANIMALS AND PLANTS 



139 



For smaller or larger animals the dimensions should be adjusted. The 

 combination feedbox and waterer is easily removable and is located, when 

 in position, slightly below floor level. The removable panel, as indicated, 

 provides ready access for the injection of solutions or the withdrawal of 

 blood samples. 



When the animal is first placed in the unit, it is usually necessary to use 

 iron pipe in place of the charged wdre to prevent him physically from back- 

 ing out. As soon as the animal becomes used to the surroundings, the 



Fig. 4-17. ISiniple holder for swine which affords restraint for bleeding or tliyroid 

 monitoring. {Courtesy of L. K. Bustad, Biology Section, Radiological Sciences Depart- 

 ment, General Electric Company, from work performed under AEC Contract TF-31-109- 

 Eng-b2.) 



charged wire will suffice. Urinary collections from males are made as 

 described above for sheep. The urinary collection from females is accom- 

 plished as described for cattle and is illustrated in Fig. 4-15. 



A method for occasional collection of samples of urine from the male 

 and female is illustrated in Fig. 4-16. Figure 4-17 shows a holder for 

 swine that affords restraint for such operations as bleeding or thyroid 

 monitoring. 



Administration of Radioisotopes to Animals. Almost any study will 

 require the quantitative administration of radioisotopes to the animal by 



