Depending on physician orders, DuoDerm dressings can be used on stage 1, 2, 3 and 4 bed sores. The length of time a DuoDerm patch may be left on a wound is determined by the amount of moisture in the wound. Under normal conditions, DuoDerm can be left on the wound for 3-4 days.ecause DuoDerm essentially creates a moisture barrier, they should not be used on people with infected bed sores. Under normal circumstances, wounds covered with DuoDerm are likely to develop a strong odor after several days. The odor is consider to be a normal part of of the product.
Nicotine is detectable in a urine test for 2-4 days. A blood test will detect nicotine for up to 2-4 days. A saliva test will detect nicotine from 1-4 days. Nicotine, like many other drugs, can be detected with a hair follicle drug test for up to 90 days.
Sorry to split hairs on this, but given that the typical half-life of nicotine is 2 hours, and that most assays have a limit of detection of 0.1 to 0.5 ng/ml, following the logic I described above, all the nicotine has gone from the blood stream within 24 hours. i.e. when you take a blood sample from a smoker 24 hours after their last smoke, they will most likely have a blood nicotine level <0.5 ng/ml. (i.e.>95% gone by 24 hrs).