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| lineeguida:la_modalita_a_volume_garantito_nella_ventilazione_convenzionale [2025/05/16 09:15] – [Principi di funzionamento] admin | lineeguida:la_modalita_a_volume_garantito_nella_ventilazione_convenzionale [2025/05/16 09:20] (versione attuale) – admin | ||
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| //Figura 2: This figure shows a recording from an 850-g baby with ten inflations, illustrating the effects of triggered and untriggered inflations occurring close together because the back-up ventilator rate was too closet o the baby’s spontaneous rate. The three waves are from top to bottom flow (ml/sec), pressure (cmH2O) and tidal volume (ml). The triggered inflations and their VT are indicated by T. The untriggered inflations are indicated by UT. The inflating pressure for each inflation depends on expired VT of the preceding inflation of the same type. Note that although there is a large difference in the inflation pressure, there is relatively little difference in the delivered VT [Klingenberg C (2011) A practical guide to neonatal volume guarantee ventilation. J Perinatol; 31: | //Figura 2: This figure shows a recording from an 850-g baby with ten inflations, illustrating the effects of triggered and untriggered inflations occurring close together because the back-up ventilator rate was too closet o the baby’s spontaneous rate. The three waves are from top to bottom flow (ml/sec), pressure (cmH2O) and tidal volume (ml). The triggered inflations and their VT are indicated by T. The untriggered inflations are indicated by UT. The inflating pressure for each inflation depends on expired VT of the preceding inflation of the same type. Note that although there is a large difference in the inflation pressure, there is relatively little difference in the delivered VT [Klingenberg C (2011) A practical guide to neonatal volume guarantee ventilation. J Perinatol; 31: | ||
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| Nei neonati con RDS in fase acuta un Ti di 0.3” può essere sufficiente; | Nei neonati con RDS in fase acuta un Ti di 0.3” può essere sufficiente; | ||
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| //Figura 3: This figure shows a photo from the ventilator screen of five inflations. The three waves are from top to bottom pressure (cmH2O), flow (l/min) and VT (ml). It illustrates two main problems. First, the inflation time is too short therefore the flow wave ends abruptly at the end of inflation before reaching the baseline, and the tidal volume curve has a sharp peak. This is shown by the arrows. Second, the expires time is too short so the flow waves ends abruptly during expiration. This is shown by the asterisks [Klingenberg C (2011) A practical guide to neonatal volume guarantee ventilation. J Perinatol; 31: | //Figura 3: This figure shows a photo from the ventilator screen of five inflations. The three waves are from top to bottom pressure (cmH2O), flow (l/min) and VT (ml). It illustrates two main problems. First, the inflation time is too short therefore the flow wave ends abruptly at the end of inflation before reaching the baseline, and the tidal volume curve has a sharp peak. This is shown by the arrows. Second, the expires time is too short so the flow waves ends abruptly during expiration. This is shown by the asterisks [Klingenberg C (2011) A practical guide to neonatal volume guarantee ventilation. J Perinatol; 31: | ||
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| - La **prima modalità** è la diretta impostazione del flusso; un flusso adeguato è quello che consente il raggiungimento della pressione di picco e il mantenimento della stessa per un breve plateau. Flussi troppo elevati rappresentano un elemento lesivo per il parenchima polmonare, flussi insufficienti determinano un lento raggiungimento della pressione di picco e talora non consentono l’erogazione del VT (Figura 4). | - La **prima modalità** è la diretta impostazione del flusso; un flusso adeguato è quello che consente il raggiungimento della pressione di picco e il mantenimento della stessa per un breve plateau. Flussi troppo elevati rappresentano un elemento lesivo per il parenchima polmonare, flussi insufficienti determinano un lento raggiungimento della pressione di picco e talora non consentono l’erogazione del VT (Figura 4). | ||
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| //Figura 4: curva di andamento delle pressioni in relazione al flusso.// | //Figura 4: curva di andamento delle pressioni in relazione al flusso.// | ||