None
Conditions
Interventions
Experimental group :Use Bioimpedance Spectroscopy (BIS)
Control group:Routine monitoring (SpO2 + ETCO2)
Sponsors
The Second Affiliated Hospital of Naval Medical University
Eligibility
Sex/Gender
All
Age
18 Years to 75 Years
Inclusion criteria
Inclusion criteria: 1.Age: 18 to 75 years old, both genders included. 2.Surgical Type: Elective surgeries (primarily laparoscopic abdominal surgeries). 3.ASA Physical Status Classification: I-III. 4.Anesthesia Type: General anesthesia with endotracheal intubation. 5.BMI: 18-30 kg/m². 6.Estimated Duration of Surgery: >=1 hour and <=4 hours. 7.Signed Informed Consent Form.
Exclusion criteria
Exclusion criteria: 1.Contraindications to Bioimpedance Spectroscopy (BIS): Including chest skin lesions or allergies preventing BIS electrode placement; implanted electronic devices (e.g., pacemakers, ICDs, neurostimulators). 2.Severe Cardiopulmonary or Cerebrovascular Diseases. 3.Open Abdominal Surgery (i.e., procedures converted to or planned as open laparotomy). 4.Patients requiring postoperative transfer to the ICU without extubation. 5.Estimated duration of surgery > 4 hours. 6.Patients deemed unsuitable for participation by the investigator (e.g., psychiatric disorders, communication barriers). 7.Patients declining the use of the BIS technology.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Bioelectrical impedance value; | — |
Secondary
| Measure | Time frame |
|---|---|
| Changes in ETCO2, PaCO2, PaO2, pH, and lactate;The incidence rate of pulmonary complications (within one week after surgery);Consistency between BIS and EtCO? respiratory rate (Bland-Altman Limits of Agreement);Warning response time (interval from alarm to processing);PACU stay time (minutes);Pain VAS score, nausea and vomiting score; | — |
Countries
China
Contacts
Public ContactHongbin Yuan
The Second Affiliated Hospital of Naval Medical University
Outcome results
None listed