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.
The IRS usually issues 9 out of 10 refunds in 21 days or less. This means that you can generally expect your funds to arrive in no more than three weeks after your tax return has been filed. However, keep in mind the IRS tax refund schedule dates are an estimation and is not set in stone. Sometimes there are delays, which may cause your refund to take longer than 21 days to reach you. It is recommended that you E-File because it will process quicker and you should receive your return within three weeks.