Prospective study of incidence and predictors of peripheral intravenous catheter-induced complications
Received 21 September 2014
Accepted for publication 21 October 2014
Published 8 December 2014 Volume 2014:10 Pages 993—1001
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 3
Editor who approved publication: Professor Garry Walsh
Mostafa A Abolfotouh,1,2 Mahmoud Salam,1 Ala’a Bani-Mustafa,1 David White,3 Hanan H Balkhy2,4
1King Abdullah International Medical Research Center (KAIMRC), 2King Saud bin-Abdulaziz University for Health Sciences (KSAU-HS), 3Nursing Department, 4Infection Prevention and Control Department, King Abdulaziz Medical City, Riyadh, Saudi Arabia
Background: Although intravenous therapy is one of the most commonly performed procedures in hospitalized patients, it remains susceptible to infectious and noninfectious complications. Previous studies investigated peripheral intravenous catheter (PIVC) complications mainly in pediatrics, but apparently none were investigated among Saudi adult populations. The aim of this study was to assess the pattern and complications of PIVCs at King Abdulaziz Medical City (KAMC), Riyadh, Saudi Arabia.
Methods: An observational prospective cohort study investigated PIVCs pattern and complications among adults with PIVCs, admitted to various wards at KAMC. PIVCs-related clinical outcomes (pain, phlebitis, leaking, and others) were recorded in 12-hour intervals, using the Visual Inspection Phlebitis scale. Density incidence (DI) and cumulative incidence (CI) of complications and their relative risks (RRs) were calculated. Regression analyses were applied and significance limits were set at P<0.05.
Results: During the study period, 359 adults were included, mounting to 842 PIVCs and 2,505 catheter days. The majority of patients, 276 (76.9%), had medical, chief admission complaints, whereas 83 (23.1%) were trauma/surgical and infectious cases. Complicated catheters were found in 141 (39.3%) patients, with 273 complications (32.4/100 catheters), in 190 complicated catheters (CI =22.56/100 catheters and DI =75.84/1,000 catheter days). Phlebitis ranked first among complications, 148 (CI =17.6%), followed by pain 64 (CI =7.6%), leaking 33 (CI =3.9%), dislodgement 20 (CI =2.4%), and extravasations and occlusion 4 (CI =0.5% each). Phlebitis was predicted with female sex (P<0.001), insertion in fore/upper arm (P=0.024), and infusion of medication (P=0.02). Removal time for PIVCs insertion was not a significant predictor of phlebitis (RR =1.46, P=0.08).
Conclusion: Incidence of complications in this study was significantly higher than rates in previous studies. Better insertion techniques may be sought to lower the incidences of PIVC complications, thus extending their onset beyond day 3. Changing catheters is recommended when clinically indicated rather than routinely post-72 hours.
Keywords: catheter-induced complications, peripheral venous catheter, phlebitis, thrombo-phlebitis, incidence, prospective study
Being one of the most commonly performed procedures on hospitalized patients, peripheral intravenous catheter (PIVC) insertions make them susceptible to infectious and noninfectious complications.1 PIVC complications are classified into minor and major categories based on the severity of symptoms. Minor complications include catheter occlusions, accidental removals, fear of sharp catheters (needle phobia), and pain. On the other hand, major complications tend to be more severe, such as phlebitis, infection, extravasation, and even skin injuries.2 Published studies conducted on PIVCs among adults ranged from randomized controlled trials to descriptive and correlational designs.3–6 One systematic review showed incidence of infection to be 0.1–0.2/100 catheters or 0.2–0.9/1,000 catheter days.3 Others revealed incidence of phlebitis to be 6.2%, leaking 12.4%, and infiltration 7.4% with a striking conclusion that when PIVC catheters were restarted, the risk of phlebitis is increased by 4.4 times.5 In addition, peripheral intravenous (IV) phlebitis has been found to be directly related to the medication or infusate that the patient received via peripheral access,6,7 and to the duration of dwell time.6
Previous studies investigated PIVC complications mainly in pediatrics,8,9 which is reported as a nurse-sensitive quality indicator in hospitals worldwide.10 However, we could not find any published studies tackling PIVC complications among adults in the Saudi population. Thus, the aim of this study was to determine the pattern and incidence of PIVC complications among patients admitted to a tertiary health care facility in the Kingdom of Saudi Arabia. This was achieved through the following objectives: 1) estimation of the cumulative incidence (CI) and density incidence (DI) for major PIVC complications, 2) identification of significant risk factors for PIVC complications such as patient-related characteristics or catheter-related characteristics, and 3) determination of the timeline for the occurrence of various PIVC complications.
This is a prospective cohort study, in which the incidence of PIVCs phlebitis and other complications was assessed periodically on 12-hour intervals up to 96 hours after insertion.
King Abdulaziz Medical City (KAMC), Riyadh, Saudi Arabia, was established in May 1983. Since then, it has continued to expand, while providing services for a rapidly growing patient population in all of its catchment areas. Since its inauguration in February 2001, and within a short period, KAMC has been recognized as a distinguished health care provider with bed capacity of 690 beds.
Study subjects and sampling technique
Fourteen sub-settings were selected with a total bed capacity of 250 beds, categorized into four main groups based on the level of care provided: emergency (observation, adult, and critical), critical (neurological, surgical, intermediate, medical intensive care), cardiac (preoperative, postoperative, general), and general (four medicine/surgery wards). Adult patients admitted to the selected units at KAMC during November 2012 and January 2013 were screened through a number of inclusion/exclusion criteria. Recruited patients were adults (≥18)who underwent PIVC insertions during the time of study, and agreed to participate in the study and signed the informed consent. Patients with preexisting skin breakdowns at insertion sites (rashes, lacerations, and trauma) and immune-compromised health conditions and those with previously inserted PIVCs from outside KAMC were all excluded. A total of 359 patients constituted the target of this study.
In-service education regarding the study and the ethical rights of participants through a competency workshop was provided to a team of infection prevention and control practitioners to familiarize them with the principles of PIVCs insertion and its possible subsequent complications. Visual aids and power point illustrations of PIVC complications were utilized for training.
Data collection tool
PIVCs insertion technique at KAMC is standardized based on the hospital policy and infection control manual for procedures. Although the 2011 CDC guidelines11 recommend changing and replacing PIVCs after 72–96 hours, to reduce both the risk for infection and patient discomfort associated with phlebitis, KAMC nurses adopt the 72-hour change whether clinically indicated or not. A data collection sheet was used to collect data on the following characteristics:
- Patient-related characteristics: medical record number, patient initials, age groups, sex, comorbidities, such as diabetes, renal problems, liver dysfunctions, surgery, and others.
- PIVCs-related characteristics: size of catheter, type of dressing (transparent or gauze), site of insertion (upper arm, cubital fossa, forearm, wrist, hand), and nature of PIVC infusate (hydration [0.09%/0.45% NaCl, Dextro/NaCl, etc], antibiotics, hyperglycemic solutions [D30 water], blood products, electrolytes, others).
- Outcome characteristics: The Visual Inspection Phlebitis (VIP) scale from the third edition of the standards for infusion therapy12 is an internationally adopted tool that has been tested in literature and used in clinical settings worldwide. Phlebitis was defined as the presence of two or more signs of pain, tenderness, warmth, erythema, swelling, or a palpable cord,8,13 with or without purulent drainage from the catheter insertion site.14 The VIP scale can range from 0, indicating no symptoms of phlebitis, to 5, with signs of purulent drainage, redness, and a palpable cord greater than 3 inches.14 Infiltration was defined as permeation of IV fluid into the interstitial compartment, causing swelling of the tissue around the site of the catheter.
All PIVCs were changed for a score of 2 or more, determined by the presence of a cold or warm skin region around the insertion site, pain, redness, and/or edema extending from 1 inch to ≥2 inches the PIVC site.15
Members of the data collection team assessed the PIVC site every 12 hours. A phlebitis score was assigned and recorded for each PIVC site. If the PIVC needed to be removed for any reason, including completion of treatment or discharge, the reason for and time of removal were documented. Patients were not followed up after discharge. Data regarding the number of failed PIVC attempts per patient were not recorded as the nurses were not under study investigation. Dressings were changed as necessary according to hospital policy.
Data collectors were trained on how to approach the study participants and explain the dimensions of the study. Patients who were conscious and oriented to consent were enrolled after signing written consents whereas unconscious, disoriented, or intubated patients were enrolled after gaining consent from their families or legal guardians. There was neither a usage of experimental items nor a testing of a new product. Patient privacy and confidentiality of data were secured. This study was approved by the IRB of the Ministry of National Guard, Riyadh, Saudi Arabia (April 4, 2012, RR 11/069).
Data management and analysis
SPSS statistical software (Version 19, SPSS Inc, Chicago, IL, USA) was used for data entry and analysis. Pearson χ2 test and χ2 test for linear trend were used for categorical data. The relative risks (RRs) and 95% confidence intervals were calculated for the proportion of patients with complicated catheters and for the individual factors that made up the composite measures. CI was calculated by dividing the total number of complicated catheters over the total number of catheters multiplied by 100. DI for each group was calculated by dividing the total number of complicated catheters over the total number of days catheterized, multiplied by 1,000. To predict the significant predictors of PIVCs complications, logistic regression analyses were applied. Significance was considered at P-value <0.05.
Eight hundred and forty-two PIVC sites from 359 patients (204 males and 155 females) were followed up during a total of 2,505 catheter days. One half of all patients were 65 years and above, 77 (21.4%) aged between 18 years and 45 years, and 102 (28.4%) aged between 46 years and 64 years, with no significant sex difference. The majority of patients, 276 (76.9%), had medical, chief admission complaints, whereas surgical/trauma cases were 46 (12.8%), and infectious 37 (10.3%).
Transparent dressing was applied for the majority of catheter sites, 697 (82.8%), while gauze dressings were used for 145 (17.2%). Catheter sizes G20 and G22 were mainly inserted by nurses, 318 (37.8%) and 308 (36.6%), respectively, followed by G18, 192 (22.8%), with significant sex difference (P=0.021). PIVCs were frequently inserted in hands, 263 (31.2%), wrists 250 (29.7%), and lower arms 242 (28.7%), with only 79 (9.4%) in cubital fossi, and less than 1% in upper arms. Hands ranked first as a site of insertion for females 126 (36.0%), while lower arm ranked first among males 154 (31.3%), P=0.024. Hydration was the most frequent infusate, 387 (46.0%), followed by antibiotics, 241 (28.6%), while blood products and electrolytes constituted 107 (12.7%) and 45 (5.3%) of all infusates, respectively, with no significant sex difference (P=0.257). More than one half of insertions were done by senior staff nurses, 489 (58.1%), and 325 (38.6%) were inserted by junior staff nurses (<2 years experience), while IV skilled team contributed in only 28 (3.3%) of all insertions, with no significant sex difference.
Incidence of PIVC-related complications
Complicated catheters were found in 141 (39.3%) recruited patients, with a total number of 273 non-mutually exclusive various types of complications (32.4/100 catheters). The total number of complicated catheters was 190 catheters resulting in a CI of 22.56/100 catheters, and a DI of 75.84/1,000 catheter days (Figure 1). Phlebitis ranked first among complications, with a CI of 148 (17.6%), followed by pain, 64 (7.6%), leaking, 33 (3.9%) and dislodgement, 20 (2.4%), and extravasations and occlusion, four (0.5%) each. Females showed significantly higher CI of complications than males, 103 (29.4%) vs 87 (17.7%), P=0.00001. This difference was evident for both phlebitis (P<0.0001) and pain (P<0.001). The onset time of PIVC complications ranged from 30.7 hours (for dislodgement) to 52.64 hours (for leaking). Second day after insertion was the encounter of all complications (Figure 2).
Figure 1 Cumulative incidence of peripheral intravenous catheter complications by sex.
Figure 2 Average time of onset of various peripheral intravenous catheter complications in days.
Female patients were 1.66 times more likely to encounter complications as compared to males (RR =1.66, 95% confidence interval: 1.29–2.13, P=0.000059). Patients on IV medication were 1.41 times more likely to contract complications than those on hydration (RR =1.41, 95% confidence interval: 1.10–1.82, P=0.006). Meanwhile, patients with small-sized catheters were about two times more likely to contract complications than those with large-sized catheters (RR =1.84, 95% confidence interval: 1.44–2.36, P=0.000001) (Table 1).
Based on catheter complications per 1,000 device days, DI of complications was significantly higher among females than males (101.57 vs 58.35/1,000 catheter days, z=3.856, P=0.000115) (Table 1). Females were 1.74 times more likely to contract PIVC-related complications than males (RR =1.74, 95% confidence interval: 1.30–2.31, P=0.000115). However, after adjusting for all these possible confounders, phlebitis was predicted with female sex (P<0.001), insertion in fore/upper arm (P=0.024), and infusion of medication (P=0.02). Removal time for PIVCs insertion was not a significant predictor of phlebitis (RR =1.46, P=0.08) (Table 2). Table 3 shows a summary of the results of the study.
Table 3 Summary of study results
Figure 3 shows a significant dose–response relationship between the number of PIVCs inserted per individual patient and the proportion of patients who contracted one or more complications (χ2=20.30, P<0.00001). This proportion changed from 22.39% with one insertion to 50% with three insertions and 100% with seven insertions.
Figure 3 Relationship between the frequency of insertions per individual patient and incidence of complications.
Although IV therapy is one of the most commonly performed procedures in hospitalized patients, it remains susceptible to infectious and noninfectious complications.2 Approximately 1%–10% of such patients develop local or systemic catheter-related infections caused by alteration or disruption of skin integrity which can be an open pathway for colonization of microorganisms.2,16 In the present study, 39.3% of patients with PIVCs showed one or more complication. The frequency of phlebitis varied from 1% to 79% in various observational studies.17 In the present study, our overall combined complicated catheter rates were 22.6/100 catheters. This rate is lower than the rate of 35% in a study conducted in a comparable patient population.4 However, the rate of phlebitis in this study was 17.6%, exceeding the rates of 3% in the former study.4 Complications may be ascribed to a number of factors such as the size of the catheter, insertion site preparation, type of infusion, insertion technique, catheter dwell time, dressing type, and the insertion site.18–20 In the present study, PIVCs were inserted frequently in hands, wrist, and lower arm. Hands ranked first as a site of insertion for females, while lower arm ranked first among males. The dorsum of the hand and forearm insertion site, which should be primarily selected according to the national and local guidelines on medical wards, were utilized frequently in a previous study.2 The antecubital region was more commonly used than the dorsum of the hand.4 Insertion in fore/upper arm was a significant predictor of both phlebitis and other complications in our study.
The use of an appropriate type of dressing is intended to keep the insertion site clean and dry while also preventing external contamination and trauma.2,18 In the present study, transparent dressing was done for the majority of catheter sites. There are reports that dressing regimens and methods of securing catheters may contribute to the occurrence of infection contributing to complications including infiltration, extravasation, and catheter displacement.2 However, in the present study, incidence of complications was not significantly associated with the type of dressing. This finding was in agreement with the conclusion of a systematic review and meta-analysis that demonstrated the absence of any relationship between the type of dressing used in PIVC insertion sites and the occurrence of phlebitis, infiltration, or skin dwelling bacteria in adult patients.21 However, a previous study concluded that dressing with sterile gauze maintained the catheter in place for a longer time.21 The use of smaller caliber catheters is related to reducing the occurrence of phlebitis, since they prevent mechanical irritation to the interior walls of small-diameter veins.5,18 In the present study, G20 and G22 were the main catheter sizes used (37.8% and 36.6%, respectively), followed by G18 (22.8%), with significant sex difference (P=0.021). Patients with small-sized catheters were about two times more likely to contract complications than those with large-sized catheters. However, after adjusting for other potential confounders, this association disappeared.
No studies in the literature review discussed the phlebitis rates and risks when toxic medications were infused using a peripheral catheter.5 In the present study, hydration was the most frequent infusate, followed by antibiotics medication infusion, that was a significant predictor of phlebitis and overall complications. Patients on IV medications were 1.41 times more likely to contract complications than those on hydration. These medications were mainly antibiotics, and higher complications might be attributed to some antibiotics’ low pH levels, which are likely to increase the incidence of these complications.22
The patients’ characteristics and condition are also risk factors for phlebitis23,24 that should be considered in an individual’s care.2 In the present study, female patients were 1.66 times more likely to contract complications as compared to males, and DI of complications was significantly higher among females than males. Females were again 1.74 times more likely to contract PIVC-related complications than males. On the other hand, incidence was not significantly associated with age or the chief complaint. However, after adjusting for all possible confounders, female sex remained a significant predictor of higher incidence of overall complications and phlebitis, as well as other complications.
According to CDC guidelines,12 adult patient’s catheters should be replaced within a 72–96-hour period in order to reduce complications.19 However, the findings of this study detected no difference between patients with PIVCs catheterized for ≤72 hours and those catheterized for ≥96 hours in terms of complication rates. This was in agreement with the notion that routine replacement of PIVCs has no effect on the incidence of catheter failures.4,25 This will increase the confidence in changing IV lines according to clinical signs and symptoms, rather than adopting predetermined time frames.11
Prior studies have found that the risk of phlebitis in PIVCs increases over the first 48 hours, but then decreases.5,26,27 This finding was consistent with the findings of the present study, where the peak onset of all types of complications averaged at 44.33±32.41 hours (95% confidence interval: 40.46–48.19 hours) and at 47.32±33.61 hours (95% confidence interval: 41.86–52.78 hours) for phlebitis (Figure 2). This exerts a challenge as it conflicts with the CDC regulations,11 that stated a safe dwell time of 72–96 hours. Therefore, a safer approach would be close routine observation of PIVCs and a change when clinically indicated is more appropriate. This finding also supports the current Infusion Nurses Society recommendation to remove PIVCs based on clinical indication rather than standard interval.28–30
The combined factors of multiple PIVC insertions and extended hospital stay place chronic patients, especially, at a higher risk for phlebitis and subsequently infection.1 This is consistent with the findings of the present study, where there is a positive dose–response relationship between multiple PIVC insertions per individual patient and the risk of contracting complications. Patients enduring a predictable extended length of stay of more than 1 week may be excellent candidates for better venous alternatives such as peripherally inserted central lines with longer dwell times, thus reducing the need for frequent PIVC insertions and subsequent catheter complications.
Limitations of this study include the fact that it is based on patients recruited from a single setting. Not all potential subjects were recruited due to the lack of available research staff for recruitment. While data were collected across 2 months, we could not ensure that participants are representative of all patients through the whole year. Certain illnesses with seasonal variation may have been overrepresented in our sample. We were unable to adjust for the severity of illness or comorbid illnesses, yet the reason for admission was adjusted for. These factors could impact the wider generalizability of this study. Moreover, signs of phlebitis were measured when the PIVCs were in situ. Consequently, its occurrence after removal of the PIVCs was not recorded. Because phlebitis can arise after removal of PIVCs,5 phlebitis frequency might have been higher than reported.2
Incidence of PIVC-induced complications in this study was significantly higher than many rates found in literature. These complications were significantly predicted by sex (female), infusion of IV medication, and insertion sites (upper and forearm). Better insertion techniques may be sought to lower the incidences of PIVC complications to further delay their onset. It is suggested that health professionals seek PIVC insertion sites in the lower areas of the arm with emphasis on early shifting of medication administration from IV route to a safer oral route. Changing catheters is recommended when clinically indicated rather than routinely post-72 hours of insertion which in return minimizes the frequency of insertions per patient and subsequent complications.
This study was initiated and funded by King Abdullah International Medical Research Center, King Saud bin-Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia. The authors would like to thank the Infection Prevention and Control Department and Nursing Services at KAMC, Ministry of National Guard Health Affairs, Saudi Arabia. Special thanks go to the infection control practitioners, Mr Elias Tannous, Mr Ahmed Azzam, Mr Bassem Abukhzam, Mr Joseph Tannous, Mr Kassem Zehri, Ms Nimfa Dagunton, Ms Marissa Alarcon, Ms Basema Shadfan, Ms Nahla Ragab, Ms Khawla Salman, Mr Ahmad Ibrahim, and Mr Tamer Abu Areeshi, for their contributions in data collection.
All authors contributed toward data analysis, drafting and revising the paper and agree to be accountable for all aspects of the work.
The authors declare that they have no competing interests.
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