High flow may give you very high gas flow. This is an obvious advantage, however it’s worth noting. This is important as patients in acute respiratory failure can be extremely tachypneic, and therefore their peak inspiratory flows, which may normally be 30L/min – 60L/min, can reach up to 120 L/min (3) 👍 So if you place your tachypneic patient with PIF rate of 120L/min and minute volume >20L/min on a 15L/min NRB mask, you may not be helping them as much as you think 🙈 We will be discussing oxygen dilution later in the review.
Non-invasive respiratory support is provided by humidified high flow nasal prong therapy (HFNP). HFNP can be used to bridge low-flow oxygen therapy and CPAP. This may reduce the need for CPAP/intubation. A positive distension pressure can be reached at high flow rates of up to 2 litres per kg per minute when the appropriate nose prongs are used. Humidification and high flow can increase functional residual capability and mucocililary secretions clearance, reducing the work required to breathe. The high flows may also affect pulmonary and systemic circulation which is an important consideration when applying HFNP therapy to children with cardiac disease.Please Note: HFNP therapy is an aerosol generating procedure (AGP), a patient’s clinical requirement for HFNP should be balanced against the risk of aerosolization. HFNP therapy should not be administered to SCOVID/COVID patients. Instead, it must be conducted in a negative pressure chamber using Personal Protective Equipment (PPE), which includes a P2 respirator (N95 Mask); and Eye Protection (e.g. Eyewear; Face shield; Long-sleeve gown; Gloves (nonsterile). In the event that a room of negative pressure is not available, an AGP can be conducted in a single area without any negative pressure ventilation and with the’s door shutting. For 30 minutes after the AGP, you should keep your airborne precautions in place. It is important that the patient be moved to a positive pressure room immediately. After an aerosol generation procedure, all PPE (including P2/N95) should be discarded or replaced if they are contaminated with blood and other body fluids. Last edited by Tashina castillo, Seattle, United States.
Rc.rcjournal.com Also, this article explains how high flow nasal cannula oxygen therapy (HFNC) is performed using an air/oxygen blend, active humidifier and single heated tube. The ability to provide adequately heated, humidified medical gas at flows of up to 60 l/min is an advantage over other standard oxygen therapy. It also has a reduced anatomical deadspace, low PEEP, consistent FIO2, good humidity, and can be used to heat and humidify. While there have not been large randomized clinical trials, HFNC is becoming more popular as a respiratory support option for seriously ill patients. Most of the published data is available for newborns. However, there is not much evidence for critically ill adults. These reports include data on a variety of subjects, including hypoxemia, COPD exacerbation, postextubation oxygenation and sleep apnea. Despite this diversity of evidence, many studies have shown that HFNC can reduce breathing frequency, work, and the need to escalate respiratory support. Many important issues still remain, like the precise indications for and criteria for starting or stopping HFNC. HFNC, despite these problems, has proven to be an effective treatment for adult patients with severe respiratory diseases and/or respiratory impairment.
Rtmagazine.com It is also explained that high flow systems can provide very precise oxygen concentrations but are often uncomfortably and intrusive. An oxygen delivery device was developed recently that allows precise oxygen concentrations for different flow rates. Rates and provide a level of comfort The patient. You can use it to deliver positive expiratory pressure (PEEP), that could splint conducting arteries or recruit collapsing alveoli. Because it uses a molecular humidity system, HFO can improve humidity delivery and promote mucokinesis. It also helps to avoid mucous plugging. HFO may increase patient comfort while oxygen is administered and allow patients with NIV dependence to eat or receive HFO. Nursing care There is no risk of dehydration that could cause serious health problems. Revision by Linda Morales, Sendai (Japan), August 31, 2021