Page 49 - Journal of Special Operations Medicine - Fall 2016

OC modified to provide pulse dosing on inspiration and mode. Low-pressure oxygen was supplemented at the
maximize oxygen delivery, but this method is not a rou- specific port on the rear of the ventilator and supplied
tine use of OC. Bordes et al. tested an old transport from the OC at a flow of 0.5–10L/min.
7
ventilator, LTV 1000 (CareFusion Corp.; http://www
.carefusion.com), to determine Fio delivered with OC. Table 1 Elisée 350 ResMed Ventilator and SeQual Integra
2
The Resmed Elisée 350 (http://www.resmed.com) is a 10-OM OC Specifications
™
recently developed, portable ventilator with an internal Elisée 350 ResMed ventilator specifications
turbine that is not dependent on a high-pressure driving
gas supply. Low-pressure oxygen is inserted at a specific Weight (kg) 4.5
port on the rear of the device. This new ventilator has Dimensions (mm) 290 × 250 × 130
been chosen by the FMHS to equip the FSUs. However, Breath types Volume control, pressure
to our knowledge, the capacity of this ventilator to de- control, pressure support,
liver Fio when functioning with an OC has never been spontaneous
2
published. The aim of this study was to measure the Fio Tidal volume range (mL) 20–2,500
2
achievable when the Elisée 350 was used with an OC as PEEP range (cmH O) 0–25
the only source of oxygen. 2
Breath rate (breaths/min) 2–50
Operating environment guidelines
Materials and Methods
Temperature range 5°C–40°C
This study was performed in the French military FSU in Relative humidity range 10%– 95%
Niamey, Niger, in January 2015. This FSU has been in SeQual Integra 10 OM OC specifications
place for 1 year. All measurements were obtained in the
intensive care tent at a temperature of 25°C (77°F) in an Dimensions (inches) 26.5 × 14.7 × 19.5
environmentally controlled room. Rate flow (L/min) 0.5–10
Outlet pressure oxygen,
The Elisée 350 ventilator was the ventilator used for psi (KPa) Nominal 6.0 (41.4)
this study (Table 1). Oxygen was delivered by a SeQual Operating environment guidelines
Integra 10-OM OC (Chart Industries, http://www.chart
industries.com). The Elisée 350 ventilator and SeQual Temperature 10°C–40°C
Integra 10-OM OC were selected because they are used Relative humidity 10%–95%
by the FMHS in FSUs. The SeQual Integra 10-OM OC OC = oxygen concentrator; PEEP = positive end-expiratory pressure.
is capable of generating from 0.5 to 10L/min of continu-
ous oxygen flow. It is an electronically operated OC that
separates oxygen from ambient air. This OC is equipped Ventilators were connected to a 3L test balloon (Silko-
with an oxygen monitor that provides continuous mon- Bag Rush; Teleflex Medical; http://www.teleflex.com)
itoring of oxygen concentration. An indicator light is and a Hydro-Guard Mini heat and moisture exchanger
activated when oxygen concentration falls below pre- (Intersurgical; http://www.intersurgical.com) via the
set levels (85% and 70%). This OC delivers Fio above manufacturer-supplied circuit. We used the analyzer
2
90% at any oxygen flow. 7 integrated in the ventilator to continuously measure
Fio .
2
Experimental Setup
We tested two Elisée 350 ventilators coupled with two Elisée 350 ventilators were in volume control. Table 2
OCs (Figure 1). They were used on alternating-current details the different combinations tested.

Figure 1 (A) Intensive care bed in the French military forward surgical unit. (B) Bench test. (C) Port for low-flow oxygen source
on the rear of the ventilator. (D) SeQual Integra 10-OM oxygen concentrator.

(A) (B) (C) (D)

Fio Delivered by Ventilator With Oxygen Concentrator 31
2