Venous Access Devices: Clinical Rounds

Nurses' evidence-based knowledge and self-efficacy in venous access device insertion and management: Development and validation of a questionnaire

AIM

To develop and psychometrically test an instrument to assess nurses' evidence-based knowledge and self-efficacy regarding insertion and management of venous access devices (short peripheral catheter (SPC), long peripheral catheter/midline (LPC) and PICC) and the management of totally implantable central venous catheter (Port) in adult patients.

DESIGN

Multicenter cross-sectional observational study with questionnaire development and psychometric testing (validity and reliability).

METHODS

An evidence-based instrument was developed including a 34-item knowledge section and an 81-item self-efficacy section including four device-specific parts. Nineteen experts evaluated content validity. A pilot study was conducted with 86 nurses. Difficulty and discrimination indices were calculated for knowledge items. Confirmatory factor analyses tested the dimensionality of the self-efficacy section according to the development model. Construct validity was tested through known group validity. Reliability was evaluated through Cronbach's alpha coefficient for unidimensional scales and omega coefficients for multidimensional scales.

RESULTS

Content validity indices and results from the pilot study were excellent with all the item-content validity indices >0.78 and scale-content validity index ranging from 0.96 to 0.99. The survey was completed by 425 nurses. Difficulty and discrimination indices for knowledge items were acceptable with most items (58.8%) showing desirable difficulty and most items (58.8%) with excellent (35.3%) or good (23.5%) discrimination power, and appropriate to the content. The dimensionality of the model posited for self-efficacy was confirmed with adequate fit indices (e.g., comparative fit index range 0.984-0.996, root mean square error of approximation range 0.054-0.073). Construct validity was determined and reliability was excellent with alpha values ranging from 0.843 to 0.946 and omega coefficients ranging from 0.833 to 0.933. Therefore, a valid and reliable tool based on updated guidelines is made available to evaluate nurses' competencies for venous access insertion and management.

Complications and Management of Totally Implantable Central Venous Access Ports in Cancer Patients at a University Hospital in Oman

Objectives

Totally implantable central venous access ports (port-a-caths) are increasingly used for the safe administration of chemotherapy; however, their use is associated with complications. This study reviews patterns of complications, reasons for premature removal and the duration of the use of port-a-caths in patients receiving cancer treatment at Sultan Qaboos University Hospital (SQUH) and compares the infection rate with the literature and the researchers’ experiences.

Methods

This retrospective follow-up study included patients who had received cancer treatment through a port-a-cath and were admitted to SQUH between January 2007 and April 2019. Demographic features, underlying diagnosis, clinical stage, treatment, duration of use and the cause of premature removal of the port-a-cath were recorded.

Results

A total of 516 port-a-caths were inserted in 482 cancer patients. The majority of devices were implanted by interventional radiologists (n = 459; 89.0%) and the right internal jugular vein was most frequently accessed (n = 396; 76.7%). The mean indwelling time of a port-a-cath was 288 days (range: 3–1,872 days) for patients with complications and 550 days (range: 7–3,123 days) for patients without complications. Port-a-cath-related infection was the main complication (n = 63; 12.2%). Patient age, gender, treatment intent, underlying diagnosis, clinical stage, chemotherapy regimen, number of treatment courses, operator implanting the port, the type of micro-organism isolated from the port-a-cath and body mass index were significant factors affecting catheter indwelling time (P <0.05). On multivariate analysis, however, none of the factors was found to be significant.

Conclusion

Infection was the most common complication necessitating port-a-cath removal. The infection rate was much lower than the researchers’ previous experience and compares favorably with several published reports.

CARE PROTOCOL WITH TOTALY IMPLANTED VENOUS CATHETER: A COLLECTIVE CONSTRUCTION

ABSTRACT Objective: to collectively construct a fully implanted central venous catheter care protocol with nurses from a highly complex oncology center. Method: a convergent care research, conducted at a hospital qualified as a highly complex oncology care unit in Minas Gerais, Brazil, from September 2017 to January 2018. The construction of the protocol was guided by Evidence Based Practice. Initially, data was collected from client records. After that, five workshops were held with the nurses, aiming to verify the material and human resources available, besides the viable care to compose the protocol. The analysis involved processes of apprehension, synthesis, theorization and transference. Results: most of the 219 medical records evaluated from clients with fully implanted venous catheters were female (77.1%), with a mean age 49.6 years old, breast cancer, and average catheter stay of 502 days. The nurses participating in the research were female, with a mean age 30.2 years old, time since graduation of 5.2 years and experience in oncology of 4.8 years on average. During the workshops, the participants reflected on the daily routine of the service, with a theoretical and scientific basis, which allowed, considering the professionals' opinion, to verify the care evidences and the practicability of the practices in the study scenario for the construction of a protocol. Care emerged related to puncture, manipulation, salinization and catheter clearance. Conclusion: the protocol construction process involved the participation of all oncology nurses, and all the mentioned care has scientific evidence for its use.