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1/1/2004

ARDS Patient Transport Case Study
Tim Crittenden - Duke Life Flight
Case Study:

This was a transport that was completed on 2/14/03 at 2345 from a local referring hospital’s ICU to Duke’s MICU. The patient was a 71 year old female weighing 102kg. She had been admitted to the hospital’s ICU on 1/29/03 with a diagnosis of lower GI bleed. She was transferred to the hospital’s medical floor where her condition worsened. She was re-admitted to the ICU and eventually was intubated. She became increasingly ventilator dependent and cultures of her bronchial washings grew out yeast. Reaching the limits of treatment from this facility’s ICU, she was accepted to Duke’s Medical Intensive Care Unit for evaluation of possible jet/oscillator ventilator use.

The patient was flown from the referring hospital to Duke. This minimized her “out of hospital” time. The flight time was approximately 15 minutes and the ground time would have been approximately 40 minutes.

Her ventilator settings on the referring facility’s machine were as follows:

  • Pressure control 20
  • PEEP 10
  • RR 8
  • FIO2 100%
  • I time 1.6sec

An ABG was drawn less than an hour before our arrival at the referring facility with the following results: pH 7.53, pCO2 44, pO2 69, HCO3 36.8, BE 12.6.

Following a standard exam prior to transport, she was transferred to our aircraft litter and placed on the LTV 1000. The settings were very similarly matched from the bedside vent. We remembered that in order to achieve a pressure control of 20 (exclusive of PEEP) with a PIP of 30, the pressure control setting on the LTV 1000 had to be set to 30 (inclusive of PEEP). Aside from that all other settings were the same. With these settings, her exhaled tidal volumes were 830-930cc, PIP 30, Paw 15, and her saturations increased from 95 to 99% during the transport.

An ABG was drawn upon her arrival to Duke’s MICU with the following results: pH 7.50, pCO2 42, pO2 79, HCO3 33, BE 9.

This transport review demonstrates the versatility of the LTV 1000 as compared with other methods (bagging, volume cycled vents, etc.). One of the many wonderful benefits of this ventilator for critical care transport is that it is brought to the bedside of the referring facility and the patient is not removed from it until they reach the bedside of the receiving facility. This patient would not have tolerated short periods of bagging or an entire transport on a volume cycled ventilator. It can also be presumed with some certainty that her ABG results would not have improved, albeit minimally, with any lesser ventilation method.

Summary of ABGs

2/14/03----2300, prior to LTV10002/15/03----0030, after LTV1000
pH7.537.50
pCO24442
pO26979
Bicarb36.833
Base excess12.69


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