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NCT Number: NCT06791993

Impact of Probiotics on Gut Microbiome During Antibiotic Prophylaxis in Elective Orthopedic Surgery

This study aims to evaluate whether probiotics can help maintain a healthy gut microbiome in patients receiving prophylactic antibiotics during elective orthopedic surgery. Antibiotics, while effective in preventing infections, can disrupt the balance of gut bacteria, leading to dysbiosis. The study hypothesizes that the use of probiotics during the perioperative period can prevent or reduce this disruption, supporting gut health and overall well-being. The research seeks to answer whether combining probiotics with routine antibiotic prophylaxis can preserve gut microbiome balance and improve patient outcomes.

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Key information

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

Thonburi Trang Hastanesi, Thailand

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About this study

This double-blinded, randomized controlled trial aims to evaluate the effect of probiotics on maintaining gut microbiome balance in patients undergoing elective orthopedic surgery who receive routine prophylactic antibiotics. Antibiotics, while essential for reducing the risk of surgical site infections, are known to disrupt gut microbiota, leading to dysbiosis, an imbalance in microbial composition. Dysbiosis can compromise gut health, reduce microbial diversity, and impair metabolic functions essential for recovery.

The study explores whether a dual-strain probiotic with Human Milk Oligosaccharides (HMO) can prevent or minimize dysbiosis during the perioperative period. By comparing patients receiving routine antibiotics alone with those receiving antibiotics plus probiotics, this trial seeks to identify if probiotics can preserve gut microbial diversity and function.

To assess the impact, fecal samples collected at specific time points will undergo detailed microbiome analysis, including metrics such as microbial richness, diversity, and such. Secondary measures will evaluate the broader effects on patient well-being during the recovery period.

This study is designed to provide evidence for the potential role of probiotics as an adjunct therapy to maintain gut health during antibiotic use, offering a novel approach to improving post-surgical recovery and patient outcomes.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Adults aged between 18 and 65 years
  • Scheduled for elective low-risk orthopedic surgery (carpal tunnel release, A1 pulley release, knee arthroscopic surgery).

Exclusion criteria

  • History of infection or antibiotic use within the last 12 weeks.
  • Use of routine probiotics, vitamins, or herbal supplements in the last 4 weeks.
  • Known allergy to beta-lactam or cephalosporin antibiotics.
  • History of autoimmune disease, uncontrolled systemic disease, or chronic inflammatory conditions (e.g., systemic lupus erythematosus, rheumatoid arthritis).
  • History of chronic intestinal diseases such as small intestine bacterial overgrowth (SIBO), irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), or celiac disease.
  • Increased risk of infection due to medical comorbidities or use of immunosuppressive drugs.

Treatment and study plan

Placebo capsule

Drug

Participants will receive an inert placebo capsule that matches the probiotic capsule in size, shape, and color. The placebo will be administered orally twice daily, starting 2 weeks before surgery and continuing for 2 weeks postoperatively.

Probiotic with Human Milk Oligosaccharides (HMO)

Dietary Supplement

Participants will receive a dual-strain probiotic containing Human Milk Oligosaccharides (HMO) in capsule form. The probiotic will be administered orally twice daily, starting 2 weeks before surgery and continuing for 2 weeks postoperatively.

Other names: Dual-Strain Probiotic

Primary outcomes

  1. Maintenance of Gut Microbiome Balance

    Time frame: 2 weeks preoperatively (T0) to 1 month postoperatively (T4).

    Evaluate whether probiotic administration preserves gut microbiome balance during the perioperative period by assessing changes in microbial richness, diversity, and evenness. Shotgun metagenomic sequencing analysis will be used to measure microbial composition and diversity.

Secondary outcomes

  1. Firmicutes/Bacteroidetes Ratio

    Time frame: 2 weeks preoperatively (T0) to 1 month postoperatively (T4).

    Determine changes in the Firmicutes/Bacteroidetes ratio, a key marker of dysbiosis, between intervention groups. Using shotgun metagenomic sequencing.

  2. Short-Chain Fatty Acid (SCFA) Production

    Time frame: 2 weeks preoperatively (T0) to 1 month postoperatively (T4).

    Assess changes in SCFA production (e.g., acetate, butyrate) as indicators of gut health and microbiome function. Using SCFA quantification through microbiome metabolite analysis.

  3. Dysbiosis Index

    Time frame: 2 weeks preoperatively (T0) to 1 month postoperatively (T4).

    Dysbiosis Index is the ratio of the total number of Proteobacteria strains divided by total overall bacteria strain

  4. Microbiome health index ( MHI) OR Microbiome health index for post-antiobiotic (MHI- A)

    Time frame: 2 weeks preoperatively (T0) to 1 month postoperatively (T4).

    Microbiome Health Index (MHI-A) calculated via microbiome analysis. MHI-A is a biomarker and a quantitative measure method of post-antibiotic dysbiosis and subsequent restoration. Higher MHI-A means higher healthy microbiome with low antibiotic resistance gene. Lower MHI- A mean dysbiosis, high antiobiotic resistance gene

  5. WHO-5 Well-being Index

    Time frame: 1 week preoperatively (T1) and 2 weeks postoperatively (T3).

    The WHO-5 Well-Being Index (The World Health Organization-Five Well-Being Index) is a self-report instrument measuring mental well-being. It consists of five statements relating to the past two weeks. Each statement is rated on a 6-point scale (0,1,2,3,4,5), with higher scores indicating better mental well-being.

    The raw score is calculated by totalling the scores on each of the five questions. Theraw score ranges from zero to 25, zero representing worst possible mental well-beingand 25 representing best possible mental well-being. To get a percentage score ranging from zero to 100, the raw score is multiplied by four.

    A percentage score of zero represents worst possible mental well-being; a score of 100 represents best possible mental well-being

  6. EuroQol 5-Dimension (EQ-5D) score.

    Time frame: 1 week preoperatively (T1) and 2 weeks postoperatively (T3).

    EuroQol 5-Dimension (EQ-5D) score (EQ-5D) descriptive system comprises the same five dimensions (MOBILITY, SELF-CARE, USUAL ACTIVITIES, PAIN / DISCOMFORT and ANXIETY / DEPRESSION), beach dimension having five response levels:no problems, slight problems, moderateproblems, severe problems, unable to/extreme problems. The respondent is asked to indicate his/her health state by checking the box next to the most appropriate response level for each of the five dimensions. Responses are coded as single-digit numbers expressing the severity level selected in each dimension. For instance, 'slight problems' (e.g. 'I have slight problems in walking about') is always coded as '2'. The digits for the five dimensions can be combined in a 5-digit code that describes the respondent's health state; for instance, 21111 means slight problems in the mobility dimension and no problems in any of the other dimensions

Study contacts

Contact information is provided by the study sponsor or research team.

Göksel Dikmen, Assoc. Prof. Dr

CONTACT

[email protected]

+90 505 202 1748

İbrahim Tuncay, Prof. Dr.

CONTACT

[email protected]

+90 212 304 43 78

Sponsors and collaborators

Lead sponsor

Acibadem Maslak Hospital

Other

Collaborators

  • Acibadem University

Registry information

Official study title

Impact of Probiotics Combined with Antibiotic Prophylaxis on Gut Microbiome Balance in Patients Undergoing Elective Orthopedic Surgery, Double-Blinded Randomized Controlled Trial

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Jan 24, 2025
Registry last updated
Jan 24, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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