Abstract:
OBJECTIVE:Perfluorocarbon liquid ventilation has been shown to enhance pulmonary mechanics and gas exchange in the setting of respiratory failure. To optimize the total liquid ventilation process, we developed a volume-limited, time-cycled liquid ventilatory support, consisting of an electrically actuated, microprocessor-controlled, double-cylinder, piston pump with two separate limbs for active inspiration and expiration. DESIGN:Prospective, controlled, animal laboratory study, involving sequential application of conventional gas ventilation, partial ventilation (PLV), and total liquid ventilation (TLV). SETTING:Research facility at a university medical center. SUBJECTS:A total of 12 normal adult New Zealand rabbits weighing 3.25+/-0.1 kg. INTERVENTIONS:Anesthestized rabbits were supported with gas ventilation for 30 mins (respiratory rate, 20 cycles/min; peak inspiratory pressure, 15 cm H2O; end-expiratory pressure, 5 cm H2O), then PLV was established with perflubron (12 mL/kg). After 15 mins, TLV was instituted (tidal volume, 18 mL/kg; respiratory rate, 7 cycles/min; inspiratory/expiratory ratio, 1:2 cycles/min). After 4 hrs of TLV, PLV was re-established. MEASUREMENTS AND MAIN RESULTS:Of 12 animals, nine survived the 4-hr TLV period. During TLV, mean values +/- SEM were as follows: PaO2, 363+/-30 torr; PaCO2, 39+/-1.5 torr; pH, 7.39+/-0.01; static peak inspiratory pressure, 13.2+/-0.2 cm H2O; static endexpiratory pressure, 5.5+/-0.1 cm H2O. No significant changes were observed. When compared with gas ventilation and PLV, significant increases occurred in mean arterial pressure (62.4+/-3.5 torr vs. 74.0+/-1.2 torr) and central venous pressure (5.6+/-0.7 cm H2O vs. 7.8+/-0.2 cm H2O) (p < .05). CONCLUSIONS:Total liquid ventilation can be performed successfully utilizing piston pumps with active expiration. Considering the enhanced flow profiles, this device configuration provides advantages over others.
journal_name
Crit Care Medjournal_title
Critical care medicineauthors
Meinhardt JP,Quintel M,Hirschl RBdoi
10.1097/00003246-200005000-00038subject
Has Abstractpub_date
2000-05-01 00:00:00pages
1483-8issue
5eissn
0090-3493issn
1530-0293journal_volume
28pub_type
杂志文章abstract:OBJECTIVE:An increasing number of ICU patients survive and develop mental, cognitive, or physical impairments. Various interventions support recovery from this postintensive care syndrome. Physicians in charge of post-ICU patients need to know which interventions are effective. DATA SOURCES:Systematic literature searc...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
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更新日期:2014-05-01 00:00:00
abstract:OBJECTIVE:To explore the potential value of heart rate variability features for automated monitoring of sedation levels in mechanically ventilated ICU patients. DESIGN:Multicenter, pilot study. SETTING:Several ICUs at Massachusetts General Hospital, Boston, MA. PATIENTS:Electrocardiogram recordings from 40 mechanica...
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pub_type: 杂志文章,多中心研究
doi:10.1097/CCM.0000000000001708
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doi:10.1097/CCM.0b013e31826ab3a1
更新日期:2013-02-01 00:00:00
abstract:OBJECTIVES:Carbon monoxide poisoning affects 50,000 per year in the United States alone. Mortality is approximately 3%, and up to 40% of survivors suffer from permanent neurocognitive and affective deficits. Hyperbaric oxygen therapy has shown benefit on reducing the long-term neurologic sequelae of carbon monoxide poi...
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更新日期:2018-07-01 00:00:00
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abstract:OBJECTIVE:To assess the impact of sepsis classification and multidrug-resistance status on outcome in patients receiving appropriate initial antibiotic therapy. DESIGN:A retrospective cohort study. SETTING:Barnes-Jewish Hospital, a 1,250-bed teaching hospital. PATIENTS:Individuals with Enterobacteriaceae sepsis, sev...
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pub_type: 杂志文章
doi:10.1097/00003246-198711000-00002
更新日期:1987-11-01 00:00:00
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journal_title:Critical care medicine
pub_type: 临床试验,杂志文章
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更新日期:2012-07-01 00:00:00
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doi:10.1097/00003246-200001000-00030
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更新日期:2014-05-01 00:00:00
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更新日期:2004-03-01 00:00:00
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pub_type: 杂志文章,多中心研究
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更新日期:2003-04-01 00:00:00
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更新日期:2012-01-01 00:00:00
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更新日期:2013-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1097/00003246-198505000-00010
更新日期:1985-05-01 00:00:00
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更新日期:1985-01-01 00:00:00
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更新日期:1975-09-01 00:00:00
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更新日期:2009-09-01 00:00:00
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