Clinical trial NCT06688890: Optimization of Surgical Hand Preparation Using Sorbectol
Official title: Optimization of the Effectiveness of the Hydroalcoholic Solution of 3% Chlorhexidine Digluconate and 0.3% Potassium Sorbate in 70% Ethanol, Sorbectol, in Surgical Hand Preparation According to the UNE-EN 12791 Standard
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: NA
Conditions: Hand Washing
Keywords: Sorbectol
bacterial load
inmediate effect
prolongated effect
Lead sponsor: Universidad Complutense de Madrid
Sponsor class: OTHER
First posted: 2024-11-14
Enrollment: 28
Sex: ALL
Minimum age (years): 18
Maximum age (years): 75
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Intervention model description: clinical trial, randomized, crossover.
Primary purpose: TREATMENT

Brief summary: Previous studies evaluated the efficacy of the hydroalcoholic solution of 3% digluconate of chlorhexidine, 0.3% potassium sorbate and 70% ethanol, "Sorbectol" (Spanish patent ES 2 784 275 B2) in the surgical hand preparation with positive results. This clinical trial is focused on optimising the effectiveness of Sorbectol in the surgical hand preparation by scaling the application times of the product from 1 to 5 minutes following the test procedure and the effectiveness criteria of the European norm EN-12791.

Detailed description: This is a randomised clinical trial with a Latin-square crossover design, to test the effectiveness of the Sorbectol solution in surgical hand preparation, according to the EN 12791 standard, at application times of 1, 3 or 5 minutes. The test compares the bacterial load on the hands of at least 23 healthy volunteers immediately (immediate effect) and three hours after (3-hour effect) application of the test product with respect to the reference product, RP, of EN 12791 (n-propanol 60%).

Briefly: The bacterial load on hands before antisepsis (pre-values) is obtained after the preparatory handwash using a diluted soft soap. Next, surgical hand antisepsis protocols are performed. Enrolled participants are randomly divided into four groups of the same size to receive RP or Sorbectol for 1 min (P1), 3 min (P2) or 5 min (P3) in parallel in a first run. The test is repeated in a second, third and fourth run changing the antisepsis roles for each group. A washout period of at least 2 weeks between experimental runs allow for the reconstitution of skin microbiota. All participants complete the four antiseptic procedures at the end of the trial.

The RP group, rub their hands with n-propanol (60% v/v) for 3 min. The test product groups, rub their hands with Sorbectol for 1 or 3 or 5 min. In all cases applying as many 3 ml portions as necessary to keep the hands moist for the selected time. After antisepsis the bacterial load (post-values) is determined using a split-hands model. One hand to assess the bacterial load immediately after treatment (immediate post-values) and the other hand to assess the bacterial load 3 hours later, keeping the hand gloved in the meantime (3-h post-values).

Eligibility criteria: Inclusion Criteria:

* Participants with healthy skin in both hands and short fingernails.
* No use of antibacterial agents for at least three days before the intervention.
* Not received antibiotic treatment for at least ten days before the intervention.

Exclusion Criteria:

* Known systemic pathologies.
* Wearing hand jewelry on the hands.
* Allergy to any ingredient of which the solutions used in the clinical trial are composed.
* Cognitive and / or motor limitation that makes it impossible to carry out instructions for hand washing.

Primary outcomes:
measure: Immediate effect assessed immediately after surgical hand antisepsis
timeFrame: Immediate effect is a measure determined at the time point 1, within the first 10 minutes of disinfection assay. The specific duration is subject to variation based on the particular application protocol of P1, P2, P3 and RP.]
measure: Effect assessed 3-hours after surgical hand antisepsis
timeFrame: The 3-hours effect is a measure determined at the time point 2 which is 3 hours after the immediate effect determination]
Secondary outcomes:
measure: Bacterial counts preexisting on the hands before surgical hand antisepsis. Pre-values.
timeFrame: Prevalues is a measure determined at the time point 0 which represent the beginning of the disinfection assay
measure: Bacterial counts immediately after surgical hand antisepsis. Immediate post-values
timeFrame: Immediate post-value is a measure determined at the time point 1, within the first 10 minutes of disinfection assay. The specific duration is subject to variation based on the particular application protocol of P1, P2, P3 and RP.]
measure: Bacterial counts 3-hours after surgical hand antisepsis. 3-hours post-values
timeFrame: 3-hours post-value is a measure determined at the time point 2, which is 3 hours after the immediate post-value determination.
Other outcomes:
Locations:
city: Madrid
country: Spain
facility: Universidad Complutense de Madrid
Study officials:
affiliation: UNIVERSIDAD COMPLUTENSE MADRID
name: PARRA
role: PRINCIPAL_INVESTIGATOR
References:
citation: Rutala WA, Boyce JM, Weber DJ. Disinfection, sterilization and antisepsis: An overview. Am J Infect Control. 2023 Nov;51(11S):A3-A12. doi: 10.1016/j.ajic.2023.01.001.
citation: Herraiz Soria E, Alou L, Martin-Villa C, Becerro-de-Bengoa-Vallejo R, Losa-Iglesias M, Sevillano D. Alcohol-Based Chlorhexidine and Potassium Sorbate Rub Strengthens the Effectiveness of Traditional Hand Scrubbing and Improves Long-Lasting Effectiveness-Evaluation of Hand Preparation Protocols According to EN 12791. Antibiotics (Basel). 2024 May 20;13(5):470. doi: 10.3390/antibiotics13050470.