Final answer:
For long-term preservation, a decedent should be embalmed before being placed in refrigeration. Refrigeration should be at or below 4 degrees Celsius to inhibit bacterial growth. Warm blankets and room temperature should be avoided, as they could expedite decomposition.
Step-by-step explanation:
When placing a decedent in refrigeration for a long period of time, it is best practice to embalm the body before refrigeration. This helps in preserving the body for an extended period. Refrigeration slows down the decomposition process by providing a cold environment that inhibits the growth of bacteria, which thrive at warmer temperatures. In general, the refrigeration temperature should be kept at or below 4 degrees Celsius (40 degrees Fahrenheit). Unlike refrigeration, embalming involves treating the body with chemicals to temporarily preserve it for funeral services or medical study. Embalming can include aspects such as arterial embalming, cavity treatment, hypodermic tissue treatment, and surface embalming, depending on the circumstances and the embalmer's practices.
Wrapping the body in warm blankets or keeping it at room temperature would not be appropriate, as these actions could accelerate the decomposition process. Long-term preservation requires appropriate cooling or chemical treatment to ensure that the deceased's body remains in the best condition possible for future needs, whether for a funeral service, medical examination, or for any other legal or personal reasons.