Pressure Support Mode VS CPAP/BiPAP - page 2

I just started on a ICU floor and am super overwhelmed with information especially regarding vents. Almost every patient on the floor is on one so I know it is super important to understand them. Can... Read More

  1. by   bclark297
    Not to get in-depth and scientific ...but when I'm at work if someone is on..

    Pressure Support- They are intubated and the patient is on pressure support to see how well they tolerate doing the work of breathing on their own with the goal to extubate.

    • Generally, (with its exceptions) a patient will be on PS for few hours or so. This ventilator mode for long periods of time can tire a patient out.

    BiPap- their pulmonary function is circling the drain... good chance this is the last step before they get intubated.

    Cpap- In my experience this is used for someone with OSA. They wear it when they go to sleep and it comes off in the morning.
    Last edit by bclark297 on Dec 16, '17
  2. by   rkealy
    I think of CPAP as a mode and pressure supports is the measurement of the amount of CPAP support. I also think a pressure support as peep I don't know if that's accurate but that's what I think of it . For instance you can have a non-invasive CPAP with a peep of 15 or you can be intubated on vent CPAP with a pressure support of 15. I know that's not completely Apples to Apples comparison but it's the way I think of it. BiPAP is really for someone who needs support with ventilation with volume of ventilation so it helps you get air in with a higher inhalation pressure which reduces Airway resistance with help you get larger volumes to facilitate gas exchange and a veal are recruitment in some instances and then also has a reduced usually lower expiratory pressure to help get that air out but still provide peep. BiPAP is usually used on those that require help compensating for metabolic acidosis or to help reduce hypercarbia in those that have respiratory acidosis.
  3. by   rkealy
    Sorry about the misspells in the lack of punctuation I'm doing this with my type to text
  4. by   Dee Myers BSRT RRT
    Hi Gang,
    I am a Respiratory Therapist and I think I can clear the Pressure Support (PS) mystery up a bit. PS was originally created to over come the work of the dead space in the vent circuit. Dead space is non-gas exchange areas in the ventilator structure. Adding a 6 foot corrugated tube that carries air to the patient adds to the work of breathing. PS helps to decrease this work by decreasing the amount of dead space. It's like a proverbial step stool. Cpap and Bipap supply pressure that still exists when the patient exhales. This positive end expiratory pressure (peep) holds the alveoli open therefore increasing O2 in the blood. This is a simplified version but I think you can get the point!
    DEE
  5. by   kgkuntryluvr
    Our one-year-old has been on a vent 24/7 since birth, so we're always learning and exploring the wonderful world of ventilation modes. She started on pressure control and is now on pressure support. She also tried NAVA when she was intubated, but didn't tolerate it well. We are gradually lowering the pressure support in hopes of getting her to CPAP, then off of the vent completely. She has a trach, so all of these modes have been used invasively on her. I must say that when it comes to ventilators, the Astral 150 is an amazing piece of technology, and has been great for home use and travel.

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