High School

In what way was Van Helmont's conclusion incorrect?

In the 1640s, the Flemish chemist Jan Baptista van Helmont performed an experiment as follows:

1. I filled a pot with 200 pounds of dirt that had been dried in an oven.
2. I planted the stem of a willow tree weighing 5 pounds in the pot.
3. I watered the tree with rainwater or distilled water for 5 years, covering the pot with an iron plate that allowed water through but not dust.
4. After 5 years, the tree weighed 169 pounds and about 3 ounces. The dirt weighed only 2 ounces less than the original 200 pounds.

Van Helmont concluded that the 164 pounds of growth arose solely from water. In what way was this conclusion incorrect?

Answer :

Final answer:

TPN is a hypertonic solution given via a PICC line or tunneled catheter, is prepared daily based on lab values, the dressing change is done with medical asepsis, blood glucose is checked every 4-6 hours when initiated, a new bag and filter are inserted every 24 hours.

Explanation:

Total Parenteral Nutrition (TPN), also known as Hyperalimentation is a complex medical therapy. Here are the answers to the specific questions:

  1. TPN is a hypertonic solution.
  2. TPN may be given via a PICC line or a tunneled catheter.
  3. TPN is prepared daily based on lab values.
  4. The TPN dressing change is done with aseptic technique, which is part of medical asepsis.
  5. The blood glucose level is checked every 4-6 hours when TPN is initiated.
  6. A new TPN bag is hung every 24 hours. A new filter is hung with each bag, which is indeed true.

Learn more about Total Parenteral Nutrition here:

https://brainly.com/question/32353061

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