Treaton MV200, User Manual

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Appendix 1.10 Description of the intelligent adaptive ventilation iSV
App.1-12
Appendix 1.10 Description of the intelligent adaptive ventilation iSV
Appendix 1.10.1 Function of iSV mode. General description
ISV mode is an integral ventilation mode - with the support of patients without spontaneous
breathing and with any level of spontaneous respiratory activity.
The mode includes both mandatory (PCV-VG) and assisted ventilation (CPAP+PS). The algo-
rithm of its time cycles reminds SIMV. At the same time the mode is similar to MMV, but all the
basic parameters that ensure patient required minute ventilation are automatically set in accor-
dance with data of his respiratory mechanics.
If the patient has no spontaneous breathing, iSV provides hardware breaths with optimal values
of V
Т
and RB. At the appearance of spontaneous breaths the mode provides pressure support
the level of pressure depends on the respiratory activity of the patient. The more active is the
patient, the lower support level he needs.
Its differences from other modes:
•
provides automatic control of the set MV;
•
automatically adjusts the proportion of mandatory and assisted ventilation depending on the
patient's respiratory activity;
•
automatically determines the parameters of control and support pressure;
•
automatically in real time determines the optimal respiratory rate and target tidal volume on
the basis of the patient's respiratory mechanics, providing the minimum work of breathing;
•
automatically adjusts the I: E ratio;
•
prevents the situation with the development of perceptible autoPEEP;
• provides ventilation at the minimum possible airway pressure (uses double control);
• automatically calculates static and dynamic (in real-time, taking into account RCexp) limits of
the safe ventilation for Vt, RB and I:E, ensures strict compliance of the ventilation parameters
for each inspiration with these limits;
•
provides the best conditions for both the patient and the physician at the apnea;
•
if necessary, provides the MV adaptation depending on the actual needs of the patient;
•
it is designed for ventilation from intubation to extubation and was originally designed for se-
paration of patients from ventilator as his spontaneous respiratory activity is recovered;
•
has minimum basic control settings: % MV for ventilation and FiO
2
and PEEP - for oxygena-
tion.
The mode provides guaranteed minute volume regardless of the degree of spontaneous respi-
ratory activity of the patient. In the absence of spontaneous breathing it provides hardware in-
spirations with double control (PCV-VG). In the presence of spontaneous respiratory activity of
the patient the mode becomes identical to CPAP+PS, but the support pressure level PS is au-
tomatically adjusted to provide the set MV. As the recovery of spontaneous breathing, the level
of the support pressure is reduced to the minimum of 5 cmH
2
O.
The application of iSV for newborn patients has not been sufficiently stu-
died. Therefore the selection of the iSV mode is blocked for patients with
height up to 57 cm or weight up to 5 kg.