The pulmonic valve is the second valve of the heart. Like the aortic valve, it is also referred to as a semilunar valve, because of its shape. It lies between the right ventricle and the pulmonary artery, which takes blood to the lungs.
Fentanyl is an opioid with rapid onset of pain relief; it is often used to treat breakthrough pain. Duragesic and similar patches release fentanyl through the skin. A patch may provide pain relief for up to 72 hours. Several deaths or life-threatening overdoses have been linked to misuse of fentanyl patches.
Sometimes, depending on the size of the abrasion, a patch is placed over the closed lid. A patch helps to decrease pain and helps large abrasions heal faster. An eye should not be patched continuously for more than 24 hours. The patch should be removed at least daily and the antibiotic drop or ointment put in the eye again.