전기 임피던스 단층촬영 유래 지수를 이용한 고유량 비강 캐뉼라 실패 예측: 다기관 연구 (EFI-HFNO)
연구 개요
상태
상태
정황
정황
개입 / 치료
개입 / 치료
상세 설명
디자인: 단일 기관, 전향적 관찰 연구. 환경: 중국 상하이 루이진 병원. 인구: 2023년 12월부터 2024년 3월 사이에 HFNC를 받은 급성 호흡 부전 성인 환자. 개입: HFNC 사용 중 자발 호흡 시 EIT 모니터링. FI는 흡기 유량-시간 파형의 오목함을 정량화하는 곡선 맞춤 공식을 사용하여 EIT에서 유도된 국소 환기 신호에서 계산되었습니다.
종점: 주요 - HFNC 실패(48시간 내 기계 환기로의 단계적 상향 조정 또는 지속적 저산소증). ROC 분석은 FI를 ROX 지수, 호흡수 및 SpO₂와 비교했습니다. 로지스틱 회귀 모델은 예측 가치와 오즈비를 평가했습니다.
연구 유형
연구 유형
등록 (실제)
등록
연락처 및 위치
연구 장소
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Shanghai Municipality
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Shanghai, Shanghai Municipality, 중국, 200025
- Department of Critical Care Medicine,Ruijin Hospital,Shanghai Jiao Tong University School of Medicine
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참여기준
자격 기준
자격 기준
공부할 수 있는 나이
- 성인
- 고령자
건강한 자원 봉사자를 받아들입니다
샘플링 방법
연구 인구
설명
포함 기준:
- 나이 ≥18세
- 고유량 비강 산소 요법(HFNC)이 필요한 급성 호흡 부전
- 안정된 혈역학
- FiO₂ ≤0.6
제외 기준:
- 자발 호흡에 영향을 미치는 신경근육 질환
- 임신
- 전기 임피던스 단층촬영(EIT) 금기증
- 불량한 EIT 신호 품질
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
그룹/코호트 수
코호트 및 개입
그룹/코호트그룹/코호트 |
개입 / 치료개입 / 치료 |
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Physiological Validation Cohort
Mechanically ventilated patients with acute respiratory distress syndrome (ARDS) receiving pressure support ventilation.
Intervention: Simultaneous electrical impedance tomography (EIT) and esophageal pressure monitoring at three sequential pressure support levels (PSmin, PSbase, PSmax).
Outcome measures: EIT-derived Flow Index (EFI), esophageal pressure swing (ΔPes), pressure-time product per minute (PTP/min).
No HFNO administered.
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Patients received pressure support ventilation at three sequentially adjusted levels (PSmin, PSbase, PSmax).
Breathing parameters were continuously monitored using an electrical impedance tomography (EIT) device, and inspiratory effort was invasively measured via an esophageal pressure catheter.
PulmoVista 500 EIT device (Dräger Medical, Lübeck, Germany) was used for continuous real-time monitoring of regional lung ventilation.
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Derivation Cohort - HFNO Success
High-risk patients with acute hypoxemic respiratory failure (AHRF) initiated on high-flow nasal oxygen (HFNO) who achieved clinical stabilization without requiring escalation to noninvasive ventilation or endotracheal intubation within 72 hours.
Intervention: EIT monitoring and bedside data collection (heart rate, respiratory rate, arterial blood gases, SpO₂, ROX index, EMOX index) at baseline (HFNO initiation) and at 30 minutes.
No additional device intervention.
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Patients received HFNO as part of standard clinical care for acute hypoxemic respiratory failure.
The treatment was titrated by the clinical team based on physiological parameters (SpO₂, RR, ABG), aiming to maintain SpO₂ ≥ 92% and reduce signs of respiratory distress.
Patients received standard-of-care HFNO for AHRF.
Additionally, a PulmoVista 500 EIT device was used to monitor lung ventilation and derive the EFI at baseline and 30 minutes.
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Derivation Cohort - HFNO Failure
High-risk patients with AHRF initiated on HFNO who required escalation to noninvasive ventilation or endotracheal intubation within 72 hours due to refractory hypoxemia, progressive respiratory acidosis, severe respiratory distress, or hemodynamic instability.
Intervention: EIT monitoring and bedside data collection (same variables as success group) at baseline and 30 minutes.
Escalation decision guided by predefined objective criteria, not by EIT data.
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Patients received HFNO as part of standard clinical care for acute hypoxemic respiratory failure.
The treatment was titrated by the clinical team based on physiological parameters (SpO₂, RR, ABG), aiming to maintain SpO₂ ≥ 92% and reduce signs of respiratory distress.
Patients received standard-of-care HFNO for AHRF.
Additionally, a PulmoVista 500 EIT device was used to monitor lung ventilation and derive the EFI at baseline and 30 minutes.
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Validation Cohort - HFNO Success
Independent temporally separate cohort of high-risk AHRF patients initiated on HFNO who achieved clinical stabilization without escalation.
Same inclusion/exclusion criteria as derivation cohort.
Intervention: Identical 30-minute reassessment protocol: EIT monitoring and bedside data collection at baseline and 30 minutes.
Model tested prospectively without coefficient refitting.
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Patients received standard-of-care HFNO for AHRF.
Additionally, a PulmoVista 500 EIT device was used to monitor lung ventilation and derive the EFI at baseline and 30 minutes.
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Validation Cohort - HFNO Failure
Independent temporally separate cohort of high-risk AHRF patients initiated on HFNO who required escalation to noninvasive ventilation or endotracheal intubation.
Same escalation criteria as derivation cohort.
Intervention: EIT monitoring and bedside data collection at baseline and 30 minutes.
The fixed dual-domain model (baseline PaCO₂, 30-min EFI, ΔRR, ΔSpO₂) derived from the derivation cohort was applied without refitting to assess discrimination.
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Patients received standard-of-care HFNO for AHRF.
Additionally, a PulmoVista 500 EIT device was used to monitor lung ventilation and derive the EFI at baseline and 30 minutes.
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연구는 무엇을 측정합니까?
주요 결과 측정
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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HFNC Failure Rate(Early Reassessment at 30 Minutes)
기간: within 30 minutes after HFNO initiation (with monitoring of outcomes up to hospital discharge)
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HFNO failure was defined as escalation to noninvasive ventilation (NIV) or endotracheal intubation due to refractory hypoxemia, progressive respiratory acidosis, severe respiratory distress, or hemodynamic instability.
Within-tier adjustments (increasing flow or FiO₂ without changing support modality) were NOT considered failure.
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within 30 minutes after HFNO initiation (with monitoring of outcomes up to hospital discharge)
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2차 결과 측정
2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Physiological Validation of EFI
기간: During physiological measurements in mechanically ventilated patients (performed before the clinical HFNO cohort; within 48 hours of ICU admission)
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EFI was compared with esophageal pressure swing (ΔPes) and pressure-time product per minute (PTP/min) across pressure support levels using regression analysis and repeated within-subject comparisons.Unit of Measure No unit for R² (dimensionless ratio); Arbitrary units (a.u.) for EFI; cm H₂O for ΔPes; cm H₂O·s/min for PTP/min.
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During physiological measurements in mechanically ventilated patients (performed before the clinical HFNO cohort; within 48 hours of ICU admission)
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Persistent Abnormality at 30 Minutes
기간: within 30 minutes after HFNO initiation
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ANCOVA-adjusted 30-minute values of EFI, PaCO₂, heart rate, respiratory rate, pH, PaO₂ were compared between HFNO success and failure groups to identify persistent physiological burden.Unit of Measure EFI: arbitrary units (a.u.); PaCO₂ and PaO₂: mmHg; Heart rate: beats/min; Respiratory rate: breaths/min; pH: dimensionless (pH units);
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within 30 minutes after HFNO initiation
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Divergent Short-Term Response Trajectories
기간: Baseline to 30 minutes after HFNO initiation
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Generalized estimating equations (GEE) evaluated time-by-group interactions for EFI, respiratory rate, PaO₂, PaCO₂, pH, heart rate, ROX, to identify divergent early response trajectories.Measure of Central Tendency / Measure of Dispersion Time-by-group interaction P values; Estimated marginal means at baseline and 30 minutes for each group; Within-patient change scores (Δ values) between the two time points for each variable Unit of Measure EFI: arbitrary units (a.u.); Heart rate: beats/min; Respiratory rate: breaths/min; pH: dimensionless (pH units); PaCO₂ and PaO₂: mm Hg; ROX: dimensionless index.
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Baseline to 30 minutes after HFNO initiation
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공동 작업자 및 조사자
수사관
수사관
- 연구 의자: Hongping Qu, Department of Critical Care Medicine,Ruijin Hospital,Shanghai Jiao Tong University School of Medicine
연구 기록 날짜
연구 주요 날짜
연구 시작 (실제)
연구 시작
기본 완료 (실제)
기본 완료
연구 완료 (실제)
연구 완료
연구 등록 날짜
최초 제출
최초 제출
QC 기준을 충족하는 최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
처음 게시됨
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
마지막 업데이트 게시됨
QC 기준을 충족하는 마지막 업데이트 제출
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
기타 연구 ID 번호
기타 연구 ID 번호
- [2025]232 and [2025] 30
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