| 摘要 |
<p>A disposable cold pack for cooling and storing a sample of freshly drawn blood at 28.degree. to 40.degree.F. for 45 minutes has an outer flexible insulation layer and a pair of sealed flexible plastic envelopes, one beside the other, one containing water and the other containing ammonium nitrate in a ratio to water from 1.24:1 to 1.26:1 by weight. The envelopes are provided with a connecting passageway between them releasably sealed in closed condition by an external spring clamp or by a mating tongue and groove assembly.</p> |
