In other acute situations patients may need a higher concentration of oxygen and a non-rebreathe mask or simple oxygen mask is often used. Flow rates of 1-4 litres per minute are used with nasal cannulas, equating to a concentration of approximately 24-40% oxygen.Flow rates of up to 6 litres can be given but this will often cause nasal dryness and can be uncomfortable for patients (British Thoracic Society, 2008).hey deliver oxygen in a variable manner; this means the amount of oxygen inspired depends on the patientâs breathing rate and pattern. For this reason they are not suitable for use in the acute phase of illness with patients who need controlled oxygen therapy.
If you paper file, it will take three to four weeks for the IRS to process the return and acknowledge your refund. If you e-file, you will get a notice of arrival within 24 hours and confirmation of refund within 72 hours.
2016-2017 Tax Season â Amended Tax Return Refund Schedule. While the IRS promises to have regular return refunds processed within 21 days for nine out of ten tax payers, it does take quite a bit longer to receive a refund if you amended your tax return. Generally you will have to wait 8 to 12 weeks more for the IRS to process amended returns since they prioritize regular returns.