1 / 8

AVAPS TM Feature More about the Algorithm

How to improve Efficiency of ventilation and Comfort of patient?. AVAPS TM Feature More about the Algorithm. Efficiency. Comfort. Safety. Versatility. Prediction. AVAPS Algorithm. Estimation of Vte at each breath (Auto-TRAK) Comparison of the averaged Vte with target Vte

lali
Download Presentation

AVAPS TM Feature More about the Algorithm

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. How to improve Efficiency of ventilation and Comfort of patient? AVAPSTM Feature More about the Algorithm Efficiency Comfort Safety Versatility Prediction

  2. AVAPS Algorithm • Estimation of Vte at each breath (Auto-TRAK) • Comparison of the averaged Vte with target Vte • Calculation of the pressure to add to reach the target Vte • Progressive increase of the IPAP (< 1cmH2O/min) from breath to breath • If the patient is unstable: the IPAP cannot change by more than 0.5 cmH2O/min • If the cycle is not « regular » (sudden leak increase or decrease, patient sigh, the patient talks ..etc), it is not taken into account: constant IPAP • Starting pressure support (starting point) = Target Vt / (60 ml/cmH2O)

  3. Vti Vti Vti Vte Vte Vte 1 2 3 Vte Estimation Exhaled patient tidal volume is estimated at each breath Flow Inspiratory Phase Zero Patient Time Expiratory Phase Vti > Vte Vti – Vte = ∆ Leaks > 0 Vti = Vte Vti – Vte = ∆ Leaks = 0 Vti < Vte Vti – Vte = ∆ Leaks < 0

  4. Elastance Missing Vte PS of that breath Target Vte – Estimated Vte Vte of that breath Average missing Vte x Average Elastance PS of that breath + PS to add PS to add = New PS = Pressure Support Calculation For Each Breath

  5. Breath to Breath, Pressure Support Changes IPAP Max < 1 cmH2O/min IPAP Min EPAP Target Vt Vte = Vt patient

  6. Example • Target Vte = 250 ml Pressure Patient flow • Measurements: • Measured average PS = 6 cmH2O • Estimated average Vte = 220 ml • Calculation: • Missing average Vte = 30 ml • Pressure to add = (6 / 220) x 30 = 0,8 cmH2O (progressively within the next minute) • New pressure support = 6,8 cmH2O • Next breath: • Pressure to add = (0,8 x Tbreath) / 60 If Tbreath = 4s then pressure to add is 0,05 cmH2O for a stable respiration and 0,03 cmH2O for an unstable respiration

  7. Starting Pressure Support The Synchrony starts the ventilation with a pressure support of 1cmH20/60ml of the set target Vte • Target Vte = 600 ml • EPAP = 5 cmH2O • IPAP Min = 12 cmH2O • IPAP Max = 20 cmH2O • Starting point : • Starting Pressure Support = 600ml x ( 1 cmH2O/60ml) = 10 cmH2O • Starting IPAP = 15 cmH2O Example :

  8. Conclusion • Reliable algorithm based on RI Technology (Auto-TRAK: leaks and Vte estimation): • Efficient pressure changes based on Vte • Stable algorithm not affected by leaks • Small and progressive pressure changes that do not deteriorate patient comfort • This algorithm allows you to combine comfort of patient with safety and efficiency of ventilation

More Related