Surgical Hand Scrubbing Methods and the Duration of Scrubbing Time

Original Value: Surgical site infections (SSI) are a serious problem due to increased morbidity and mortality, prolonged hospitalization, hospitalization and consumption of health resources. It is reported from guides that the several factors like hair removal, skin antisepsis, prevention of hypothermia, antimicrobial prophylaxis, providing adequate oxygenation applied in intraoperative period reduce SSI. In addition to these factors, it is known that hand antisepsis of the surgical team is one of the most important factors in preventing SSI. Surgical hand scrubbing is the removal of transient flora and reduction of permanent flora as much as possible before any sterile gloves are worn before any surgical intervention. It is a cheap and easy method to prevent infections. Effective use of surgical hand scrubbing has an important role in preventing and reducing the transfer of health-related infections. Therefore, the research topic is directly related to patient safety and is considered to be one of the important areas of health services at national and international level in terms of establishing institutional culture in the prevention of surgical site infections. Although many studies have been performed on surgical hand scrubbing, no standard practice has been found in the method of scrubbing and optimal duration of scrubbing time. The aim of this study is to compare evidence-based surgical hand scrubbing methods in order to prevent surgical site infections.

Method: The research is a randomized controlled prospective study. The universe of the research was surgeon and operating room nurses in Gulhane Training and Research Hospital. The sample size is at least 180 people for one-way analysis of variance with G * Power version 3.1.19 software to determine a medium level (0.25) effect size between 4 groups at 0.80 power and 0.05 type I error level calculated (Tsai, 2016). Participants was divided into 4 groups by randomization method.

The participants in the first group performed the surgical hand scrubbing for 1 minute and with using a nail brush.

The participants in the second group performed the surgical hand scrubbing for 1 minute and without using a nail brush.

The participants in the third group performed the surgical hand scrubbing for 2 minute and with using a nail brush.

The participants in the fourth group performed the surgical hand scrubbing for 2 minute and without using a nail brush.

Standard Practices in All Groups

• The application will take place during the first surgeries entered in the morning.
• All groups will be used hand antiseptic (4% Chlorhexidine gluconate) which is used in the operating room.
• It will be examined whether the nails are smaller than 2 mm. If the nails are long, individuals will be asked to cut their nails with the help of disposable nail scissors before surgical hand scrubbing.
• There will be no nail polish on the nails and there will be no jewelry on the hand and the ring.
• 3 ml of antiseptic solution will be used at each washing stage.

Volunteers' Exclusion Criteria (Different from Exclusion Criteria):

• Participants want to leave the research
• Expected surgery time is less than 1,5 hours.
• A tear / puncture in the glove during the operation.
• During the operation, data collection will be terminated in cases where the sterility of the glove is impaired.

This research will take place in three stages. At all stages (before surgical hand scrubbing, immediately after and at the end of the surgery), culture will be taken from the active hands of the participants with the Glove Juice Method. At all stages, culture will be taken from the participants via Glove Juice Method.

Glove Juice Method It is a method used to determine the number of bacteria on hand. In this method, individuals will be provided to wear gloves on their dominant hand. Powder-free sterile gloves were used for all sampling. Then, 50 ml of 'Tryptic Soy Broth' medium was placed inside the glove and all surfaces of the gloved hand were massaged for 60 seconds by the researcher. A sample was taken from the liquid in the glove using aseptic techniques and analyzed.

Applications in Medical Microbiology Laboratory Before surgical hand scrubbing, samples taken with glove liquid technique were diluted 1:10 in Müller Hinton Broth broth in the laboratory (500 μl sample, 4.5 ml. Müeller Hinton Broth). And 300 μl of it was placed on 5% sheep blood agar plates with sterile micropipettes. 1 ml each of the other samples (after surgical hand scrubbing and at the end of the surgery) was spread diluted into three 5 % sheep blood agar plates with sterile micropipettes. All samples were incubated at 35° C for 48 hours under atmospheric conditions. Total bacterial load was determined by counting the total colony forming units (CFU) on the plates.

Statistical Method SPSS (Statistical Package for the Social Sciences) Windows Version 22.00 package program will be used in the statistical analysis of the data obtained at the end of the study. Number,%, mean ± standard deviation, median (25% -75%) values will be used in defining the data. Kolmogorov-Smirnov test will be used to evaluate the suitability for normal distribution. In comparative statistics, appropriate tests will be used according to the normal distribution of the sample. In statistical decisions, p ≤ 0.05 level will be accepted as an indicator of significant difference.