Physiology ask on respiration?
Answer:
Diseases included surrounded by the COPD category usually present as a decrease within the bronchial elastic cower (making it difficult for the patient to exhale adjectives the air thay hold in their lungs) or as increased airway resistance at the bronchial height (both are obstructive conditions). At the alveoli, the oxygen/carbon dioxide exchange is affected, making them retain CO2. When you supply oxygen in low quantity, if needed, you can correct the patient's need for O2 short increasing the CO2 retention that much. If you add too much oxygen, it shuts down the respiratory drive, making the lenient fall into a respiratory damp squib.
good question- surrounded by normal those, the drive to breathe is mediated by a rise contained by CO2. in society with chronically big CO2, like COPD'ers, that drive to breath may be mitigated, and indeed, contained by severe cases, the drive to breathe may actually be mediate by hypoxia, that is when the oxygen smooth drops low enough. so the jeopardy in these patients is that if you supply them a high concentration of inspired oxygen and increase their blood oxygen level too high, they may stop breathing altogether. in a minute, keep within mind that what's important here is the horizontal of oxygen in their bloodstream, NOT the amount of oxygen they're breathing within. for patients with severe lung pathology, giving 100% inspired oxygen may not lift their blood oxygen levels that illustrious, and indeed you may need to confer them 100% oxygen just to take them into a normal rank. so the simple answer is no, it's not contra-indicated to give someone next to COPD 100% oxygen, but you should start off slowly at first, maybe with 50% venturi pall or maybe 3 L/min on the nasal cannulae. if their SpO2 doesn't pick up though, don't consistency bad if you inevitability to go near 100% O2.