ORIGINAL ARTICLE DOI: 10.4025/cienccuidsaude.v17i1.33213 Cienc Cuid Saude 2018 Jan-Mar 17(1) 1 Research article extracted from the Master's Dissertation academic, completed in the year 2015.2. *Nurse of the Health Secretariat of the State of Santa Catarina. Health Department of the Municipality of São José. Master in nursing. São José/SC. E-mail: sellbruna@hotmail.com **Nurse. Doctor. Associate Professor of Nursing Department of Federal University of Santa Catarina. E-mail: lucia.amante@ufsc.br. ***Nurse. Master in Nursing. Professor at the Estácio University of SC. Doctor student in Nursing by the Graduate Program in Nursing at the Federal University of Santa Catarina (PEN / UFSC). E-mail: tatiana_martins15@hotmail.com. ****Nurse of the Health Secretariat of the State of Santa Catarina. Master in nursing E-mail: camillasell@hotmail.com *****Nurse of the Secretary of Health of the State of Santa Catarina. Master in Nursing. Member of GIATE / UFSC. Email: cvsenna@hotmail.com. ******Nurse in the Imperial Outreach Charity Hospital (IHC/Florianópolis-SC). A member of the GAO/UFSC E-mail: fe_loccioni@hotmail.com. DIMENSIONING OF NURSING PROFESSIONALS AND THE OCCURRENCE OF ADVERSE EVENTS ON SURGICAL ADMISSION 1 Bruna Telemberg Sell* Lúcia Nazareth Amante** Tatiana Martins*** Camilla Telemberg Sell**** Carla Vieira Amante Senna***** Maria Fernanda Lehmkuhl Loccioni****** ABSTRACT Cross-sectional study of quantitative approach that aimed to analyze the design of nursing professionals facing the occurrence of adverse events. It was performed in inpatient surgical unit of a university hospital. The data were collected in 94 patients, between 23 March to 14 April 2015. The average hospital stay was 8.46 days. They put an average of 21.6 Patients classified with minimal care, 2.7 with intermediaries and 1.1 wither. The application and it demonstrated quantitative sizing 25 professionals according to the requirements of the Federal Council of nursing. As for the number of professionals, there was a daily average of 1.8 nurse in the morning period, two in the afternoon and one at night. On the middle level professionals, it was possible to identify a 5.2 average in mourning period, four in the afternoon and three at night. Of the 252 evaluations, was observed the occurrence of adverse events between 20: surgical site infection, loss of venous access, infection of venous access and falls. It is concluded that even with a framework of appropriate professionals, there were adverse events, however, when the workforce decreased adverse events increased significantly, what allows to infer that these incidents may be related to multiple factors, including the number of professionals. Keywords: Personal sizing. Perioperative nursing. Patient safety. INTRODUCTION The nurses know and understand the perioperative period (pre-op, post-op and intraoperative) to conduct a good welfare practice. The nurse needs to maintain a relationship of trust with the patient and a wire, which seeks to understand the real needs of the patient, even those that are not expressed through verbal communication, and give efficaciousness needs (1) .In addition to the nurse, the entire health team (doctors, nutritionists, psychologists) is responsible for the promotion of patient safety and quality of services, which directly influence in preventing the occurrence of errors, incidents and adverse events (EA). The occurrence of errors and can have multiple causes, among them improper sizing of nursing professionals; training and professional qualification; materials and equipment available; structural conditions; and access to new technologies and information. Current studies show that the use of personal sizing has been central to the quality in the process of nursing work and to also interfere with the quality of care, patient safety and spending control (2.3) . In this scenario, the design of nursing staff is directly related to the promotion of patient safety and must be understood as a fundamental management tool in the process of work of nurses. So, it is important to be sure the expanded concept of dimensioning of nursing staff, understood as a systematic process that is based on the planning and the quantitative and qualitative evaluation of nursing professionals sufficient to provide assistance, taking into consideration the individuality of the health services, ensuring security for patients and employees, enabling thus the workload evaluation (4) . The scaling of the nursing staff is determined by the assistance needs of the patients, considering the activities indirectly linked to the patient, in addition to the time spent on the provision of assistance. So is the product of the average daily quantity of patients assisted by the average time of nursing care per patient (4) . To determine the average daily of patients requires a classification instrument that makes it possible to