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The influence of preoperative oral microbiota characteristic distribution on postoperative delirium in elderly patients undergoing major general anesthesia surgery: A prospective nested case-control study

The influence of preoperative oral microbiota characteristic distribution on postoperative delirium in elderly patients undergoing major general anesthesia surgery: A prospective nested case-control study

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR2500112836
Enrollment
Unknown
Registered
2025-11-20
Start date
2025-12-01
Completion date
Unknown
Last updated
2025-11-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Postoperative delirium

Interventions

Sponsors

The First Affiliated Hospital of Soochow University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
65 Years to No maximum

Inclusion criteria

Inclusion criteria: 1. Age >= 65 years old; 2. Intending to undergo general anesthesia with tracheal intubation for major surgery (Major surgery is defined as any operation where the estimated duration from the surgical incision to skin suturing exceeds 2 hours, and the estimated postoperative hospital stay is at least 3 days.) 3. ASA classification I - III; 4. Intending to be hospitalized for more than 72 hours after the surgery.

Exclusion criteria

Exclusion criteria: 1. Refuse to participate; 2. Patients with a history of dental caries, periodontitis or gingivitis; 3. Emergency surgery or trauma patients; 4. Mini-Mental State Examination (MMSE) score <= 23; 5. Stroke, schizophrenia, depression, Parkinson's disease, epilepsy or dementia; 6. Illiterate, with language disorder or significant hearing or vision impairment and unable to communicate; 7. Liver function at Child-Pugh grade C, severe liver dysfunction; 8. Severe renal insufficiency, requiring preoperative renal replacement therapy; 9. History of intraoperative awareness; 10. Having fallen at least once in the past 6 months.

Design outcomes

Primary

MeasureTime frame
The incidence of POD;

Secondary

MeasureTime frame
The incidence of POMS;30-day all-cause mortality rate after surgery;The pain scores (NRS scores) during rest and coughing, as well as the usage of pain relief medications, within 1 to 3 days after the surgery;AIS score 1-3 days after surgery;Incidence of postoperative nausea and vomiting (PONV) within 1 to 3 days and the usage of rescue antiemetic drugs;;QoR-15 score at 1 to 3 days after surgery;Length of hospital stay;

Countries

China

Contacts

Public ContactHuayue Liu

The First Affiliated Hospital of Soochow University

docliu.hy@suda.edu.cn+86 153 6538 8833

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026