Ventilator-associated pneumonia with or without toothbrushing: a randomized controlled trial

Brushing Methods for Patients Unable to Use a Mouthwash: A Preliminary Study of the Effects of Moisturizing Gel and Povidone-Iodine in Healthy Volunteers

INTRODUCTION

 Brushing older adults or intubated patients who are unable to rinse can transmit bacteria from dental plaque into the oral cavity and increase the risk of aspiration pneumonia. Therefore, this study examined brushing methods to prevent the spread of bacteria in the oral cavity.  Methods: Three types of brushing methods were performed on five volunteers by dental hygienists (water group: brushing with toothbrush bristles soaked in water; gel group: brushing with a moisturizing gel placed on the toothbrush; PV-I group: brushing with toothbrush bristles dipped in povidone-iodine). Neither group spat out the saliva or gargled during brushing but brushed while wiping the water/gel/PV-I solution with a sponge brush. The same five volunteers served as subjects for the three methods. Saliva was collected before and after brushing, and the number of colonies was determined using bacterial culture.  Results: The water group demonstrated a significantly increased number of bacteria in the saliva owing to the spread of bacteria from the dental plaque. The gel group prevented the spread of the bacteria. The PV-I group showed a significant decrease in the number of bacteria in the saliva after brushing.

CONCLUSIONS

 Brushing with toothbrush bristles dipped in a povidone-iodine solution is recommended for intubated or older adult patients who cannot gargle.

Rebound Inverts the Staphylococcus aureus Bacteremia Prevention Effect of Antibiotic Based Decontamination Interventions in ICU Cohorts with Prolonged Length of Stay

Could rebound explain the paradoxical lack of prevention effect against Staphylococcus aureus blood stream infections (BSIs) with antibiotic-based decontamination intervention (BDI) methods among studies of ICU patients within the literature? Two meta-regression models were applied, each versus the group mean length of stay (LOS). Firstly, the prevention effects against S. aureus BSI [and S. aureus VAP] among 136 studies of antibiotic-BDI versus other interventions were analyzed. Secondly, the S. aureus BSI [and S. aureus VAP] incidence in 268 control and intervention cohorts from studies of antibiotic-BDI versus that among 165 observational cohorts as a benchmark was modelled. In model one, the meta-regression line versus group mean LOS crossed the null, with the antibiotic-BDI prevention effect against S. aureus BSI at mean LOS day 7 (OR 0.45; 0.30 to 0.68) inverted at mean LOS day 20 (OR 1.7; 1.1 to 2.6). In model two, the meta-regression line versus group mean LOS crossed the benchmark line, and the predicted S. aureus BSI incidence for antibiotic-BDI groups was 0.47; 0.09-0.84 percentage points below versus 3.0; 0.12-5.9 above the benchmark in studies with 7 versus 20 days mean LOS, respectively. Rebound within the intervention groups attenuated and inverted the prevention effect of antibiotic-BDI against S. aureus VAP and BSI, respectively. This explains the paradoxical findings.

Association Between Daily Toothbrushing and Hospital-Acquired Pneumonia: A Systematic Review and Meta-Analysis

Importance

Hospital-acquired pneumonia (HAP) is the most common and morbid health care-associated infection, but limited data on effective prevention strategies are available.

Objective

To determine whether daily toothbrushing is associated with lower rates of HAP and other patient-relevant outcomes.

Data Sources

A search of PubMed, Embase, Cumulative Index to Nursing and Allied Health, Cochrane Central Register of Controlled Trials, Web of Science, Scopus, and 3 trial registries was performed from inception through March 9, 2023.

Study Selection

Randomized clinical trials of hospitalized adults comparing daily oral care with toothbrushing vs regimens without toothbrushing.

Data Extraction and Synthesis

Data extraction and risk of bias assessments were performed in duplicate. Meta-analysis was performed using random-effects models.

Main Outcomes and Measures

The primary outcome of this systematic review and meta-analysis was HAP. Secondary outcomes included hospital and intensive care unit (ICU) mortality, duration of mechanical ventilation, ICU and hospital lengths of stay, and use of antibiotics. Subgroups included patients who received invasive mechanical ventilation vs those who did not, toothbrushing twice daily vs more frequently, toothbrushing provided by dental professionals vs general nursing staff, electric vs manual toothbrushing, and studies at low vs high risk of bias.

Results

A total of 15 trials met inclusion criteria, including 10 742 patients (2033 in the ICU and 8709 in non-ICU departments; effective population size was 2786 after shrinking the population to account for 1 cluster randomized trial in non-ICU patients). Toothbrushing was associated with significantly lower risk for HAP (risk ratio [RR], 0.67 [95% CI, 0.56-0.81]) and ICU mortality (RR, 0.81 [95% CI, 0.69-0.95]). Reduction in pneumonia incidence was significant for patients receiving invasive mechanical ventilation (RR, 0.68 [95% CI, 0.57-0.82) but not for patients who were not receiving invasive mechanical ventilation (RR, 0.32 [95% CI, 0.05-2.02]). Toothbrushing for patients in the ICU was associated with fewer days of mechanical ventilation (mean difference, -1.24 [95% CI, -2.42 to -0.06] days) and a shorter ICU length of stay (mean difference, -1.78 [95% CI, -2.85 to -0.70] days). Brushing twice a day vs more frequent intervals was associated with similar effect estimates. Results were consistent in a sensitivity analysis restricted to 7 studies at low risk of bias (1367 patients). Non-ICU hospital length of stay and use of antibiotics were not associated with toothbrushing.

Conclusions

The findings of this systematic review and meta-analysis suggest that daily toothbrushing may be associated with significantly lower rates of HAP, particularly in patients receiving mechanical ventilation, lower rates of ICU mortality, shorter duration of mechanical ventilation, and shorter ICU length of stay. Policies and programs encouraging more widespread and consistent toothbrushing are warranted.

Assessment of Nursing Staff's Knowledge, Attitude and Practice Regarding Oral Hygiene Care in Intensive Care Unit Patients: A Multicenter Cross-sectional Study

Background

Oral care is one of the fundamental nursing care procedures used to decrease oral colonization, dental plaque, respiratory infections, patient stay, and cost. The importance of good oral hygiene for patients in intensive care units (ICUs) is well recognized, however, the most effective way to achieve good oral care in the ICU is unclear. Therefore, the aim of this study was to assess the knowledge, attitude, and practice of nursing professionals regarding oral healthcare in ICUs among various medical institutes across India.

Materials and methods

A questionnaire-based multicentric cross-sectional survey was conducted among registered nursing professionals employed at ICUs of three government tertiary healthcare centers (THC) of India: THC-I, THC-II, and THC-III located in the eastern and northern parts of India between February 2022 and July 2022.

Results

A total of 150 nurses completed the questionnaire form (response rate: 62.5%) comprised of 49 (32.7%) males and 101 (67.3%) females with a mean age of 35.69 ± 7.7 years. Nursing officers' knowledge surpassed that of staff nurses regarding the duration of toothbrushing (p = 0.033). Among interinstitutional comparisons, THC-I nurses showed the greatest knowledge regarding the duration of toothbrushing and the mechanism of preventing saliva accumulation to reduce microbial growth (p = 0.013 and p = 0.003, respectively). Based on total work experience, participants were segregated into three groups: Group I (<7 years), group II (7.1-13.9 years), and group III (>14 years). Group II surpassed the knowledge of denture removal during sleep, cleaning after every meal, and storing in personalized air-tight containers (p = 0.001 and p = 0.036, respectively). The majority from group II recommended plain saline as the material for oral hygiene maintenance in ICU patients (p = 0.008). Group III predominantly practiced the ideal handwashing technique pre- and post-patient contact which was statistically significant (p = 0.001).

Conclusion

This study observed that a knowledge gap exists among the nurses of the three institutes across India pertaining to the oral hygiene care of ICU patients. Nurse's education and implementation of the proper oral hygiene measures for intubated patients in ICU setup is an essential need.

How to cite this article

Kumar S, Singh B, Mahuli AV, Kumar S, Singh A, Jha AK. Assessment of Nursing Staff's Knowledge, Attitude and Practice Regarding Oral Hygiene Care in Intensive Care Unit Patients: A Multicenter Cross-sectional Study. Indian J Crit Care Med 2024;28(1):48-57.

Quantitative oral health assessments in mechanically ventilated patients: A scoping review

BACKGROUND

Oral health is a key contributor to a person's overall health. Previous studies indicate that oral health deteriorates throughout ventilation and may contribute to the development of ventilator-associated pneumonia (VAP). Oral health at the time of initial ventilation may impact on this deterioration.

AIMS

To determine the quantitative clinical assessment methods used to measure oral health and what is currently known regarding the oral health of patients at the time of initial ventilation.

STUDY DESIGN

A systematic literature search using electronic bibliographic databases MEDLINE/PubMed, Embase, CINAHL, and the Cochrane Library was undertaken for this scoping review. Studies were included if patients were >18 years old and mechanically ventilated for <48 h at the time of the first oral assessment.

RESULTS

In total, 12 studies were included. The review demonstrates a limited understanding of clinical oral health at the time of initial ventilation. Significant variation in both assessment methods and reporting of oral health makes comparison of results difficult resulting in a poor overall understanding of oral health at the time of intubation.

CONCLUSION

Standardized assessment and reporting methods may improve clinical application of findings and help direct future research. We suggest developing a core outcome set to ensure consistent use of assessment tools as well as standardized reporting of results.

RELEVANCE TO CLINICAL PRACTICE

It is essential that a good understanding of oral health at the time of initial ventilation is gained so that patients receive more targeted oral hygiene intervention in ICU, potentially leading to improved patient outcomes.

Impact of oral care modalities on the incidence of ventilator-associated pneumonia in the intensive care unit: A meta-analysis

BACKGROUND

At present, evidence of the role of oral hygiene in ICU-related pneumonia is rare. The study aimed to evaluate the effectiveness of toothbrush-based oral care in preventing ventilator-associated pneumonia (VAP) in patients with mechanical ventilation in the ICU.

METHODS

Ten databases were searched for randomized controlled trials (RCTs) evaluating toothbrush-based oral care for preventing VAP in patients with mechanical ventilation in ICU. Quality assessment and data extraction were independently performed by 2 researchers. The meta-analysis was performed using RevMan 5.3 software.

RESULTS

Thirteen RCTs with 657 patients were included. Tooth brushing + 0.2%/0.12% chlorhexidine was associated with reduced incidence of VAP compared to chlorhexidine (OR = 0.63, 95% confidence interval [CI]: 0.43-0.91, P = .01) or tooth brushing + placebo (OR = 0.47, 95% CI: 0.25-0.86, P = .02) in patients with mechanical ventilation in ICU, but was similar to cotton wipe with 0.2% or 0.12% chlorhexidine (OR = 1.33, 95% CI: 0.77-2.29, P = .31).

CONCLUSIONS

Tooth brushing combined with chlorhexidine mouthwash can prevent VAP in patients with mechanical ventilation in ICU. There is no advantage of tooth brushing combined with chlorhexidine mouthwash over cotton wipe with chlorhexidine mouthwash for preventing VAP in these patients.

Physical oral care prevents ventilator-associated pneumonia in Vietnam: A prospective interventional study

BACKGROUND

Ventilator-associated pneumonia (VAP) has emerged as a critical issue in the intensive care unit (ICU) because of its high burden on patients and medical staff. Here, we examined the potential for reducing VAP incidence through physical oral care interventions without any medication.

METHODS

This prospective interventional study compared VAP incidence during an 8-month baseline period (usual oral care) and a 9-month intervention period (physical oral care with sponge brush) among patients who received mechanical ventilation for >48 h in a tertiary care hospital in Vietnam from 2017 to 2019. Physical oral care was provided by general ICU nurses who had been trained by dentists and infection control nurses. VAP was diagnosed using the Clinical Pulmonary Infection Score.

RESULTS

In total, 423 patients were enrolled in the baseline group and 454 patients were enrolled in the intervention group; 303 and 300 patients, respectively, were included in the analysis. Two hundred thirty-eight VAP episodes were identified: 135 (44.6%) during the baseline period and 103 (34.3%) during the intervention period. Univariate analysis revealed significant reduction of VAP occurrence in the intervention period (odds ratio = 0.65; 95% confidence interval = 0.47-0.90; P = 0.010). The incidences of VAP per 1000 ventilator-days were 63.4 (135/2128) during the baseline period and 48.4 (103/2128) during the intervention period (P = 0.038).

CONCLUSIONS

Physical oral care without any medication (e.g., chlorhexidine) reduced VAP incidence in the ICU. This method could be used to reduce VAP incidence, particularly in countries with limited medical resources.

Use of toothbrushing in conjunction with chlorhexidine for preventing ventilator-associated pneumonia: A random-effect meta-analysis of randomized controlled trials

OBJECTIVE

The oral cavity with poor hygiene is a reservoir of a complex community of commensal and pathogenic bacteria. Improved oral hygiene (OH) may reduce the incidence of ventilator-associated pneumonia (VAP); however, research on the efficacy of different OH treatments and their potential synergistic effects has remained inconclusive. The objective of this study was to examine whether in patients on mechanical ventilation, using a toothbrushing (T) in conjunction with chlorhexidine (CHX), as opposed to only CHX, reduced the incidence of VAP.

METHOD

A random-effect meta-analysis of randomized clinical trials, which compare the effect of CHX+T (intervention) with CHX (control) on the risk of VAP, was conducted. The Mantel-Haenszel model was used to determine the mean differences (MD), relative risks (RR) and 95% confidence intervals (CI).

RESULTS

Seven studies with 1424 patients were included. Oral care with CHX+T reduced the incidences of VAP (RR = 0.67; CI = [0.50, 0.88], p = 0.005) compared with that with CHX alone. The former also reduced the duration of mechanical ventilation (MD = -1.38; CI = [-2.43, -0.33], p = 0.01) and length of stay in the ICU (MD = -1.47; CI = [-2.74, -0.20], p = 0.02), although the risk of ICU mortality did not reduce (RR = 0.87, 95% CI = [0.72, 1.04], p = 0.17).

CONCLUSIONS

Toothbrushing along with CHX significantly reduced the risk of VAP. Further well-designed randomized controlled trials with a careful focus on the OH are needed to fully establish the advantage of toothbrushing along with CHX for reducing the risk of VAP.

Hospital Dentistry for Intensive Care Unit Patients: A Comprehensive Review

This study aimed to review the oral hygiene status, oral care guidelines, and outcomes of oral care in intensive care unit (ICU) patients from a dental perspective for effective oral care. A literature search using the keywords "Hospital dentistry" OR "Oral care" OR "Intensive care unit" OR "Hospital inpatient" OR "Hospitalization" OR "Emergency service" AND "Oral health" OR "Oral hygiene" OR "Dental plaque" was conducted in PubMed, Medline, and Google Scholar to identify publications reporting on the oral care of the patients admitted to ICUs. A total of 17,400 articles were initially identified. Of these, 58 were selected and classified into three categories for critical review. Seven of these studies evaluated the oral status of ICU patients, and most of the studies indicated that ICU patients had poor oral hygiene or required active dental treatment. Thirty-three of these studies evaluated oral care methods for ICU patients, and in general, oral care methods using chlorhexidine as adjuncts along with tooth brushing were recommended. However, there were insufficient studies to evaluate oral hygiene through effective assessment tools from a dental perspective. In 36 studies on the outcomes of oral care in ICU patients, interventions by dental professionals showed effective results in preventing hospital-acquired infection. This review highlights the importance of establishing guidelines for the evaluation of oral status in ICU patients and summarizes data that may be useful for future studies. Further studies on maintaining good oral hygiene among ICU patients are needed.

Efficiency of different protocols for oral hygiene combined with the use of chlorhexidine in the prevention of ventilator-associated pneumonia

Objective:

In ICU patients on mechanical ventilation (MV), ventilator-associated pneumonia (VAP) is a common infection. However, such infection can be prevented through oral care protocols. The objective of this study was to compare the efficiency of the use of chlorhexidine and oral hygiene protocols (brushing and clinical procedures) with that of the use of chlorhexidine alone (intervention group and control group, respectively) in decreasing the prevalence of VAP in patients ≥ 18 years of age admitted to the ICU and requiring MV.

Methods:

In this systematic review and meta-analysis, studies were identified through searches of various national and international databases, as well as of the gray literature, and were selected in accordance with eligibility criteria.

Results:

We evaluated six studies, involving a collective total of 1,276 patients. We classified the risk of bias as low in three studies, high in two, and uncertain in one; among the six risk domains evaluated, a low risk of bias was predominant in five. The results for random risks were similar in terms of direction and statistical magnitude-chi-square = 6.34; risk difference: −0.06 (95% CI: −0.11 to −0.02); I² = 21%; p = 0.007. There was a decrease in the prevalence of VAP in the intervention group (n = 1,276) included in the meta-analysis.

Conclusions:

Protocols that include the mechanical removal of oral biofilm in combination with the use of chlorhexidine can reduce the incidence of VAP among ICU patients requiring MV.

Combination of toothbrushing and chlorhexidine compared with exclusive use of chlorhexidine to reduce the risk of ventilator-associated pneumonia: A systematic review with meta-analysis

This study aimed to compare the effectiveness of 0.12% chlorhexidine alone and 0.12% chlorhexidine in combination with toothbrushing to prevent ventilator-associated pneumonia (VAP) in mechanically ventilated patients. The Embase, Latin American and Caribbean Health Science Literature, PubMed, Scientific Electronic Library Online, Scopus, LIVIVO, Web of Science, Cochrane Library, OpenThesis, and Open Access Thesis and Dissertations databases were used. Only randomized controlled trials without restrictions on the year or language of publication were included. Two reviewers assessed the risk of bias using the Joanna Briggs Institute Critical Appraisal Tool. A meta-analysis using a random-effects model estimated the combined relative risk (RR). The Grading of Recommendations, Assessment, Development and Evaluations approach was used to assess the certainty of the evidence. Initially, 2,337 studies were identified, of which 4 were considered in the systematic review and 3 in the meta-analysis (total sample: 796 patients). The studies were published between 2009 and 2017. All eligible studies had a low risk of bias. The meta-analysis revealed that the risk of VAP was 24% lower in patients receiving chlorhexidine combined with toothbrushing than in those receiving chlorhexidine alone (RR: 0.76; 95% confidence interval: 0.55-1.06), with moderate certainty of evidence and without statistical significance. In conclusion, considering the limitations of this study, a standard protocol for the prevention of VAP is not yet recommended. More studies with larger sample sizes are needed to draw strong conclusions. However, considering that toothbrushing is a simple intervention, it should be a common practice in mechanically ventilated patients, especially among patients with coronavirus disease.

Oral hygiene care for critically ill patients to prevent ventilator-associated pneumonia

BACKGROUND

Ventilator-associated pneumonia (VAP) is defined as pneumonia developing in people who have received mechanical ventilation for at least 48 hours. VAP is a potentially serious complication in these patients who are already critically ill. Oral hygiene care (OHC), using either a mouthrinse, gel, swab, toothbrush, or combination, together with suction of secretions, may reduce the risk of VAP in these patients.

OBJECTIVES

To assess the effects of oral hygiene care (OHC) on incidence of ventilator-associated pneumonia in critically ill patients receiving mechanical ventilation in hospital intensive care units (ICUs).

SEARCH METHODS

Cochrane Oral Health's Information Specialist searched the following databases: Cochrane Oral Health's Trials Register (to 25 February 2020), the Cochrane Central Register of Controlled Trials (CENTRAL) (the Cochrane Library, 2020, Issue 1), MEDLINE Ovid (1946 to 25 February 2020), Embase Ovid (1980 to 25 February 2020), LILACS BIREME Virtual Health Library (1982 to 25 February 2020) and CINAHL EBSCO (1937 to 25 February 2020). We also searched the VIP Database (January 2012 to 8 March 2020). The US National Institutes of Health Trials Registry (ClinicalTrials.gov) and the World Health Organization International Clinical Trials Registry Platform were searched for ongoing trials. No restrictions were placed on the language or date of publication when searching the electronic databases.

SELECTION CRITERIA

We included randomised controlled trials (RCTs) evaluating the effects of OHC (mouthrinse, gel, swab, toothbrush or combination) in critically ill patients receiving mechanical ventilation for at least 48 hours.

DATA COLLECTION AND ANALYSIS

At least two review authors independently assessed search results, extracted data and assessed risk of bias in included studies. We contacted study authors for additional information. We reported risk ratio (RR) for dichotomous outcomes and mean difference (MD) for continuous outcomes, using the random-effects model of meta-analysis when data from four or more trials were combined.

MAIN RESULTS

We included 40 RCTs (5675 participants), which were conducted in various countries including China, USA, Brazil and Iran. We categorised these RCTs into five main comparisons: chlorhexidine (CHX) mouthrinse or gel versus placebo/usual care; CHX mouthrinse versus other oral care agents; toothbrushing (± antiseptics) versus no toothbrushing (± antiseptics); powered versus manual toothbrushing; and comparisons of other oral care agents used in OHC (other oral care agents versus placebo/usual care, or head-to-head comparisons between other oral care agents). We assessed the overall risk of bias as high in 31 trials and low in two, with the rest being unclear. Moderate-certainty evidence from 13 RCTs (1206 participants, 92% adults) shows that CHX mouthrinse or gel, as part of OHC, probably reduces the incidence of VAP compared to placebo or usual care from 26% to about 18% (RR 0.67, 95% confidence intervals (CI) 0.47 to 0.97; P = 0.03; I2 = 66%). This is equivalent to a number needed to treat for an additional beneficial outcome (NNTB) of 12 (95% CI 7 to 128), i.e. providing OHC including CHX for 12 ventilated patients in intensive care would prevent one patient developing VAP. There was no evidence of a difference between interventions for the outcomes of mortality (RR 1.03, 95% CI 0.80 to 1.33; P = 0.86, I2 = 0%; 9 RCTs, 944 participants; moderate-certainty evidence), duration of mechanical ventilation (MD -1.10 days, 95% CI -3.20 to 1.00 days; P = 0.30, I2 = 74%; 4 RCTs, 594 participants; very low-certainty evidence) or duration of intensive care unit (ICU) stay (MD -0.89 days, 95% CI -3.59 to 1.82 days; P = 0.52, I2 = 69%; 5 RCTs, 627 participants; low-certainty evidence). Most studies did not mention adverse effects. One study reported adverse effects, which were mild, with similar frequency in CHX and control groups and one study reported there were no adverse effects. Toothbrushing (± antiseptics) may reduce the incidence of VAP (RR 0.61, 95% CI 0.41 to 0.91; P = 0.01, I2 = 40%; 5 RCTs, 910 participants; low-certainty evidence) compared to OHC without toothbrushing (± antiseptics). There is also some evidence that toothbrushing may reduce the duration of ICU stay (MD -1.89 days, 95% CI -3.52 to -0.27 days; P = 0.02, I2 = 0%; 3 RCTs, 749 participants), but this is very low certainty. Low-certainty evidence did not show a reduction in mortality (RR 0.84, 95% CI 0.67 to 1.05; P = 0.12, I2 = 0%; 5 RCTs, 910 participants) or duration of mechanical ventilation (MD -0.43, 95% CI -1.17 to 0.30; P = 0.25, I2 = 46%; 4 RCTs, 810 participants).

AUTHORS' CONCLUSIONS

Chlorhexidine mouthwash or gel, as part of OHC, probably reduces the incidence of developing ventilator-associated pneumonia (VAP) in critically ill patients from 26% to about 18%, when compared to placebo or usual care. We did not find a difference in mortality, duration of mechanical ventilation or duration of stay in the intensive care unit, although the evidence was low certainty. OHC including both antiseptics and toothbrushing may be more effective than OHC with antiseptics alone to reduce the incidence of VAP and the length of ICU stay, but, again, the evidence is low certainty. There is insufficient evidence to determine whether any of the interventions evaluated in the studies are associated with adverse effects.

Pharmacokinetic-Pharmacodynamic Target Attainment Analyses To Support Dose Selection for ME1100, an Arbekacin Inhalation Solution

ME1100 (arbekacin inhalation solution) is an inhaled aminoglycoside that is being developed to treat patients with hospital-acquired and ventilator-associated bacterial pneumonia (HABP and VABP, respectively). Pharmacokinetic-pharmacodynamic (PK-PD) target attainment analyses were undertaken to evaluate ME1100 regimens for the treatment of patients with HABP/VABP. The data used included a population pharmacokinetic (PPK) 4-compartment model with 1st-order elimination, nonclinical PK-PD targets from one-compartment in vitro and/or in vivo infection models, and in vitro surveillance data. Using the PPK model, total-drug epithelial lining fluid (ELF) concentration-time profiles were generated for simulated patients with varying creatinine clearance (CLcr) (ml/min/1.73 m2) values. Percent probabilities of PK-PD target attainment by MIC were determined based on the ratio of total-drug ELF area under the concentration-time curve (AUC) to MIC (AUC/MIC ratio) targets associated with 1- and 2-log10 CFU reductions from baseline for Klebsiella pneumoniae, Pseudomonas aeruginosa, and Staphylococcus aureus Percent probabilities of PK-PD target attainment based on PK-PD targets for a 1-log10 CFU reduction from baseline at MIC values above the MIC90 value for K. pneumoniae (8 μg/ml), P. aeruginosa (4 μg/ml), and S. aureus (0.5 μg/ml) were ≥99.8% for ME1100 600 mg twice daily (BID) in simulated patients with CLcr values >80 to ≤120 ml/min/1.73 m2 ME1100 600 mg BID, 450 mg BID, and 600 mg once daily in simulated patients with CLcr values >50 to ≤80, >30 to ≤50, and 0 to ≤30 ml/min/1.73 m2, respectively, provided arbekacin exposures that best matched those for 600 mg BID in simulated patients with normal renal function. These data provide support for ME1100 as a treatment for patients with HABP/VABP.

Preventing Ventilator-Associated Pneumonia in Intensive Care Unit by improved Oral Care: a Review of Randomized Control Trials

To assess the effects of various oral care methods on the incidence of VAP in patients receiving mechanical ventilation in intensive care units, an exhaustive literature search was undertaken using MEDLINE as well as a manual review of the relevant literature and citations. Eight publications were selected for this review. The primary endpoint was the incidence of VAP. Different oral care methods for preventing VAP were the subject of this review. Two studies that were reviewed in this article showed significant statistical difference between the intervention group and the control group regarding different oral care for lowering the incidence of VAP. The rest of the studies showed no significant statistical difference between the intervention group and the control group, but showed the importance of meticulous oral hygiene in those patients. Mechanically ventilated patients who suffer from poor oral hygiene are exposed to the harmful accumulation of oral plaque and the initiation of VAP. Proper oral care by qualified care givers can reduce the incidence of VAP. Proper oral care needs to be considered part of the medical treatment plan when a patient is admitted to the ICU to lower the incidence rates of VAP. Oral care treatment of ventilated patients in the intensive care units, for prevention of ventilator-associated pneumonia, is with high clinical relevance, decreasing morbidity and mortality in the ICU. We recommend that ICU medical teams will plan a protocol of oral care treatment, based on our article results, and implement it as part of the daily routine.

Topical povidone iodine inhibits bacterial growth in the oral cavity of patients on mechanical ventilation: a randomized controlled study

Background

Topical 0.12% chlorhexidine has been used widely to prevent ventilator-associated pneumonia in patients undergoing mechanical ventilation. However, it is not approved for mucosal application in Japan. The aims of this study were to investigate if topical povidone iodine (i) inhibits bacterial growth and (ii) disrupts the balance of the oral microbiota.

Methods

This randomized controlled clinical trial included 23 patients who underwent mechanical ventilation in the intensive care unit. The patients were divided randomly into two groups: the intervention group (n = 16) and the control group (n = 7). All patients received oral cleaning with 3% hydrogen peroxide, followed by irrigation with tap water. The patients in the intervention group received 10% povidone iodine applied topically to the oral cavity. The concentration of total bacteria in the oropharyngeal fluid were determined before, immediately after, 1 h, 2 h, and 3 h after oral care using the Rapid Oral Bacteria Quantification System, which is based on dielectrophoresis and impedance measurements. The number of streptococci, methicillin-resistant Staphylococcus aureus, Streptococcus pneumoniae, Pseudomonas aeruginosa, Porphyromonas gingivalis, and Candida albicans before, immediately after, 1 h, and 3 h after oral care were estimated based on real-time polymerase chain reaction data.

Results

After irrigation of the oral cavity, the number of bacteria decreased, but increased again at 1 h after oral care in the control group; however, in the intervention group, the concentration of bacteria was significantly lower than that in the control group at 1 hour (p = 0.009), 2 h (p = 0.001), and 3 h (p = 0.001) after oral care. The growth of all bacterial species tested was inhibited in the intervention group at 3 h after oral care, suggesting that povidone iodine did not disturb the balance of the oral microbiota.

Conclusions

Topical application of povidone iodine after cleaning and irrigation of the oral cavity inhibited bacterial growth in the oropharyngeal fluid of patients on mechanical ventilation while not disrupting the balance of the oral microbiota.

Trial registration

University Hospitals Medical Information Network Clinical Trials Registry (UMIN-CTR), UMIN000028307. Registered 1 September 2017.

Epidemiology of ICU-acquired pneumonia

PURPOSE OF REVIEW

Review of the epidemiology of ICU-acquired pneumonia, including both ventilator-associated pneumonia (VAP) and hospital-acquired pneumonia (HAP) in nonventilated ICU patients, with critical review of the most recent literature in this setting.

RECENT FINDINGS

The incidence of ICU-acquired pneumonia, mainly VAP has decrease significantly in recent years possibly due to the generalized implementation of preventive bundles. However, the exact incidence of VAP is difficult to establish due to the diagnostic limitations and the methods employed to report rates. Incidence rates greatly vary based on the studied populations. Data in the literature strongly support the relevance of intubation, not ventilatory support, in the development of HAP in ICU patients, but also that the incidence of HAP in nonintubated patients is not negligible. Despite the fact of a high crude mortality associated with the development of VAP, the overall attributable mortality of this complication was estimated in 13%, with higher mortality rates in surgical patients and those with mid-range severity scores at admission. Mortality is consistently greatest in patients with HAP who require intubation, slightly less in VAP, and least for nonventilated HAP. The economic burden of ICU acquired pneumonia, particularly VAP, is important. The increased costs are mainly related to the longer periods of ventilatory assistance and ICU and hospital stays required by these patients. However, the different impact of VAP on economic burden among countries is largely dependent on the different costs associated with heath care.

SUMMARY

VAP has significant impact on mortality mainly in surgical patients and those with mid-range severity scores at admission. The economic burden on ICU-acquired pneumonia depends mainly on the increased length of stay of these patients.

Efficacy of toothbrushing procedures performed in intensive care units in reducing the risk of ventilator-associated pneumonia: A systematic review

The aim of this systematic review (SR) was to assess whether toothbrushing-based oral heath measure (OHM), performed in intensive care units, can reduce the risk of ventilator-associated pneumonia (VAP). Dental biofilm removal has been considered important to prevent VAP. PUBMED, SCOPUS, WEB OF SCIENCE and Cochrane Central Register of Controlled Trials (CENTRAL) databases were searched up to and including December 2018 to identify randomized clinical trials (RCT) on the use of toothbrushing procedures in the prevention of VAP. Search was conducted by two independent reviewers. The risk of bias of each included study was assessed using the Cochrane Collaboration's domain-based, two-part tool. Random effects meta-analyses were conducted thoroughly. Search strategy identified 215 potentially eligible articles, of which 12 RCT were included. All studies evidenced the importance of OHM in mechanically ventilated patients in order to prevent VAP. Seven RCT (58.3%) found some degree of positive association between toothbrushing, alone or associated to oral topical chlorhexidine (CHX), and a potential reduction of mechanical ventilation-related outcomes and dental biofilm/oral bacteria. However, pooled estimates did not identify an additional decrease of VAP incidence for any of the tested procedures (ie, toothbrushing + CHX versus swab/gauze cleaning + CHX or toothbrushing + CHX versus toothbrushing alone or + placebo). Toothbrushing does not seem to promote a reduction of VAP-outcomes compared to swab/gauze cleaning, when topic CHX is applied for oral hygiene of patients submitted to mechanical ventilation.

The Effectiveness of Oral Care Guideline Implementation on Oral Health Status in Critically Ill Patients

Intubated patients need specific oral care due to the use of endotracheal tubes. An oral nursing care guideline needs to be implemented to guide nurses in oral care in intubated patients. To test the effectiveness of oral nursing care guideline implementation. The Rogers' Diffusion of Innovations Theory was used to introduce an oral nursing care guideline to 28 nurses working in an intensive care unit in a hospital within 2 months, using mass and private communication within a hospital management system. The oral care guideline was introduced to 47 intubated patients. The accuracy of oral care practice was assessed by nurse research assistants, and patients' oral health status was examined by dental nurse research assistants. The accuracy of practice among nurses was found between 88% and 100%. Total 97.47% (n = 46) of patients had an acceptable oral health status after receiving oral care based on the oral nursing care guideline. The oral nursing care guideline was effectively implemented with high accuracy and could increase patient oral integrity after its implementation.

Evaluating the Efficacy of Nanosil Mouthwash on the Preventing Pulmonary Infection in Intensive Care Unit: a Randomized Clinical Trial

Introduction

Oral and Oro-pharynx colonization and Micro-aspiration of discharges are two important processes in ventilator-associated pneumonia (VAP). So, this study design to investigated the preventive effect of oral decontamination program by Nanosil mouthwash on incidence of ventilator-associated pneumonia.

Methods

80 newly hospitalized patients who admitted in intensive care unit (ICU) of Amin Medical Education Center were enrolled to a randomized clinical trial study. Patients were randomly divided into two equal groups. In the intervention group, a multi-stage oral decontamination program was performed by using Nanosil mouthwash three times a day, and in the control group oral decontamination was performed by Chlorhexidine 0.12% with same method. The oral decontamination program was continuing for five days. The VAP was diagnosed with a version of modified clinical pulmonary infection scale (MCPIS) on the first and fifth days.

Results

In compare the case and control groups, there wasn't observed significant difference in age, gender, underling disease, smoking, and primary mean scores of MCPIS, sequential organ failure assessment (SOFA) and Glasgow coma scale (GCS) (P>0.05). In the both groups, the mean scores of SOFA and GCS were significantly improve in fifth day (P<0.05). After five days follow up, the mean score of MCPIS (1.2±0.1 vs. 3.5±0.3, P<0.001) and pneumonia rate (2.7% vs. 23.7%, P=0.008) were significantly lower in case group. But, the mortality rate was same in both groups (P>0.05).

Discussion

The use of oral care program with Nanosil mouthwash is better than Chlorhexidine for the prevention of VAP in patients who admitted in ICU.

Oropharyngeal antisepsis in the critical patient and in the patient subjected to mechanical ventilation

Lower respiratory tract infections in the intubated patient constitute a serious health problem due to their associated morbidity and mortality. Microaspiration of the buccopharyngeal secretions is the main physiopathological mechanism underlying the development of pneumonia and tracheobronchitis in intubated patients. All care bundles designed to prevent these infections include the use of antiseptics to reduce buccopharyngeal colonization. Chlorhexidine is the antiseptic most frequently assessed in clinical trials and meta-analyses that conclude that oral hygiene with chlorhexidine reduces the incidence of ventilator-associated pneumonia - maximum effectiveness being achieved when the product is administered at a concentration of 2%. However, 2meta-analyses have warned of a possible increase in mortality when chlorhexidine is used as an oral antiseptic. We therefore recommend its use but with extreme caution during application in order to avoid aspiration of the antiseptic. This article is part of a supplement entitled "Antisepsis in the critical patient", which is sponsored by Becton Dickinson.

Optimal frequency of tooth brushing in mechanically ventilated adults: Study protocol for a randomized controlled trial

The optimal frequency of tooth brushing in the critically ill has not been experimentally determined. For mechanically ventilated patients, optimal frequency of tooth brushing is an important unresolved issue as there is little evidence to judge the benefits or associated risks of tooth brushing. Given this knowledge gap, the project's overall goal is to determine the optimal frequency of tooth brushing (once, twice, or three times daily) for mechanically ventilated adults. A prospective, randomized, experimental design is used. Specifically, 345 subjects, with 207 expected to complete the study, are randomly assigned within 36 hr of intubation to one of three groups (once, twice, or three times tooth brushing daily). Tooth brushing with a soft compact-head toothbrush takes approximately 2 min. Dental plaque assessment, gingival crevicular fluid (GCF) determination for IL-1β, and data regarding healthcare-acquired infection (HAI) and clinical status are collected at baseline and daily in-hospital. The clinical impact of daily frequency of tooth brushing in relation to extent of dental plaque and inflammation reflected by GCF analysis will be compared by the three treatment arms. In addition, evaluation of safety for HAIs will be compared based on calculation of the number needed to harm. The trial will empirically determine the optimal frequency of tooth brushing in mechanically ventilated adults, balancing benefits and risks. This contribution is significant because it will have immediate impact on bedside nursing practice, and is a final component necessary for specific evidence-based guidelines for the common nursing intervention of oral care in mechanically ventilated adults.

Is it necessary to have a dentist within an intensive care unit team? Report of a randomised clinical trial

OBJECTIVE

To evaluate the effectiveness of dental treatment in improving oral health in critical patients.

METHODS

This randomised clinical trial was conducted in a general intensive care unit (ICU) at a tertiary care public facility from 1 January 2011 to 8 August 2013. Data from 254 adult patients staying in the ICU for 48 hours or more were analysed. The experimental group (n = 127) had access to dental treatment provided by a dentist four to five times a week, in addition to routine oral hygiene, whereas the control group (n = 127) had access only to routine oral hygiene, including topical application of chlorhexidine, provided by the ICU nursing staff. The baseline oral health status of the enrolled patients was poor and included edentulism, caries, gingivitis, periodontitis and residual roots. Dental treatment consisted of toothbrushing, tongue scraping, removal of calculus, scaling and root planing, caries restoration and tooth extraction.

RESULTS

The Oral Hygiene Index Simplified (OHI-S) and Gingival Index (GI) scores decreased in the experimental group but did not change significantly in the control group during the ICU stay. Dental treatment prevented most of the episodes of respiratory tract infections, as previously reported. No severe adverse events from the dental treatment were observed.

CONCLUSION

From an interprofessional perspective, our results support the idea of including dentists in the ICU team to improve oral health in critical patients and effectively prevent respiratory tract infections, in addition to the improvement achievable by applying chlorhexidine alone.

Unusually High Incidences of Staphylococcus aureus Infection within Studies of Ventilator Associated Pneumonia Prevention Using Topical Antibiotics: Benchmarking the Evidence Base

Selective digestive decontamination (SDD, topical antibiotic regimens applied to the respiratory tract) appears effective for preventing ventilator associated pneumonia (VAP) in intensive care unit (ICU) patients. However, potential contextual effects of SDD on Staphylococcus aureus infections in the ICU remain unclear. The S. aureus ventilator associated pneumonia (S. aureus VAP), VAP overall and S. aureus bacteremia incidences within component (control and intervention) groups within 27 SDD studies were benchmarked against 115 observational groups. Component groups from 66 studies of various interventions other than SDD provided additional points of reference. In 27 SDD study control groups, the mean S. aureus VAP incidence is 9.6% (95% CI; 6.9–13.2) versus a benchmark derived from 115 observational groups being 4.8% (95% CI; 4.2–5.6). In nine SDD study control groups the mean S. aureus bacteremia incidence is 3.8% (95% CI; 2.1–5.7) versus a benchmark derived from 10 observational groups being 2.1% (95% CI; 1.1–4.1). The incidences of S. aureus VAP and S. aureus bacteremia within the control groups of SDD studies are each higher than literature derived benchmarks. Paradoxically, within the SDD intervention groups, the incidences of both S. aureus VAP and VAP overall are more similar to the benchmarks.

Prospective, randomised, controlled study evaluating early modification of oral microbiota following admission to the intensive care unit and oral hygiene with chlorhexidine

OBJECTIVES

Chlorhexidine (CHX) is the most commonly used oral hygiene product for the prevention of ventilator-associated pneumonia (VAP) in patients undergoing mechanical ventilation (MV). The change in dental plaque (DP) microbiota following CHX use in patients under MV has not been described previously. The aim of this study was to evaluate the incidence of pathogenic bacteria associated with VAP and the coverage of DP within the oral cavity in patients administered CHX.

METHODS

This was a prospective, randomised, controlled, double-blind study in patients (n=16) under MV who were mouth-rinsed with either CHX or placebo. Microbiology samples were collected from the oral mucosa (OM) and DP after admission to the ICU and on Days 3, 5, 7 and 10. Minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of CHX were determined.

RESULTS

Upon admission, the occurrence of multidrug-resistant (MDR) bacteria, including carbapenem-resistant Klebsiella pneumoniae, was reported. The CHX group had a lower incidence of methicillin-resistant Staphylococcus aureus (MRSA) compared with the placebo group for the OM (RR=0.51, 95% CI 0.27-0.98; P=0.011). There was high agreement between the culture results of OM and DP (κ=0.825). VAP developed in six patients. The species identified following tracheal aspiration of VAP patients were similar to those found in the OM for four cases. The strains showed low MICs and MBCs for CHX (<0.039mg/mL).

CONCLUSIONS

Although DP is rapidly colonised by MDR bacteria, use of 2% CHX reduced the incidence of S. aureus colonisation.

Oral hygiene care for critically ill patients to prevent ventilator-associated pneumonia

BACKGROUND

Ventilator-associated pneumonia (VAP) is defined as pneumonia developing in people who have received mechanical ventilation for at least 48 hours. VAP is a potentially serious complication in these patients who are already critically ill. Oral hygiene care (OHC), using either a mouthrinse, gel, toothbrush, or combination, together with aspiration of secretions, may reduce the risk of VAP in these patients.

OBJECTIVES

To assess the effects of oral hygiene care on incidence of ventilator-associated pneumonia in critically ill patients receiving mechanical ventilation in hospital intensive care units (ICUs).

SEARCH METHODS

We searched the following electronic databases: Cochrane Oral Health's Trials Register (to 17 December 2015), the Cochrane Central Register of Controlled Trials (CENTRAL) (the Cochrane Library, 2015, Issue 11), MEDLINE Ovid (1946 to 17 December 2015), Embase Ovid (1980 to 17 December 2015), LILACS BIREME Virtual Health Library (1982 to 17 December 2015), CINAHL EBSCO (1937 to 17 December 2016), Chinese Biomedical Literature Database (1978 to 14 January 2013), China National Knowledge Infrastructure (1994 to 14 January 2013), Wan Fang Database (January 1984 to 14 January 2013) and VIP Database (January 2012 to 4 May 2016). We searched ClinicalTrials.gov and the World Health Organization International Clinical Trials Registry Platform for ongoing trials to 17 December 2015. We placed no restrictions on the language or date of publication when searching the electronic databases.

SELECTION CRITERIA

We included randomised controlled trials (RCTs) evaluating the effects of OHC (mouthrinse, swab, toothbrush or combination) in critically ill patients receiving mechanical ventilation for at least 48 hours.

DATA COLLECTION AND ANALYSIS

At least two review authors independently assessed search results, extracted data and assessed risk of bias in included studies. We contacted study authors for additional information. We pooled data from trials with similar interventions and outcomes. We reported risk ratio (RR) for dichotomous outcomes and mean difference (MD) for continuous outcomes, using random-effects models unless there were fewer than four studies.

MAIN RESULTS

We included 38 RCTs (6016 participants). There were four main comparisons: chlorhexidine (CHX) mouthrinse or gel versus placebo/usual care; toothbrushing versus no toothbrushing; powered versus manual toothbrushing; and comparisons of oral care solutions. We assessed the overall risk of bias as low in five trials (13%), high in 26 trials (68%), and unclear in seven trials (18%). We did not consider the risk of bias to be serious when assessing the quality of evidence (GRADE) for VAP incidence, but we downgraded other outcomes for risk of bias.High quality evidence from 18 RCTs (2451 participants, 86% adults) shows that CHX mouthrinse or gel, as part of OHC, reduces the risk of VAP compared to placebo or usual care from 25% to about 19% (RR 0.74, 95% confidence intervals (CI) 0.61 to 0.89, P = 0.002, I2 = 31%). This is equivalent to a number needed to treat for an additional beneficial outcome (NNTB) of 17 (95% CI 10 to 33), which indicates that for every 17 ventilated patients in intensive care receiving OHC including chlorhexidine, one outcome of VAP would be prevented. There is no evidence of a difference between CHX and placebo/usual care for the outcomes of mortality (RR 1.09, 95% CI 0.96 to 1.23, P = 0.18, I2 = 0%, 15 RCTs, 2163 participants, moderate quality evidence), duration of mechanical ventilation (MD -0.09 days, 95% CI -1.73 to 1.55 days, P = 0.91, I2 = 36%, five RCTs, 800 participants, low quality evidence), or duration of intensive care unit (ICU) stay (MD 0.21 days, 95% CI -1.48 to 1.89 days, P = 0.81, I2 = 9%, six RCTs, 833 participants, moderate quality evidence). There is insufficient evidence to determine the effect of CHX on duration of systemic antibiotics, oral health indices, caregivers' preferences or cost. Only two studies reported any adverse effects, and these were mild with similar frequency in CHX and control groups.We are uncertain as to the effects of toothbrushing (± antiseptics) on the outcomes of VAP (RR 0.69, 95% CI 0.44 to 1.09, P = 0.11, I2 = 64%, five RCTs, 889 participants, very low quality evidence) and mortality (RR 0.87, 95% CI 0.70 to 1.09, P = 0.24, I2 = 0%, five RCTs, 889 participants, low quality evidence) compared to OHC without toothbrushing (± antiseptics). There is insufficient evidence to determine whether toothbrushing affects duration of mechanical ventilation, duration of ICU stay, use of systemic antibiotics, oral health indices, adverse effects, caregivers' preferences or cost.Only one trial (78 participants) compared use of a powered toothbrush with a manual toothbrush, providing insufficient evidence to determine the effect on any of the outcomes of this review.Fifteen trials compared various other oral care solutions. There is very weak evidence that povidone iodine mouthrinse is more effective than saline/placebo (RR 0.69, 95% CI 0.50 to 0.95, P = 0.02, I2 = 74%, three studies, 356 participants, high risk of bias), and that saline rinse is more effective than saline swab (RR 0.47, 95% CI 0.37 to 0.62, P < 0.001, I2 = 84%, four studies, 488 participants, high risk of bias) in reducing VAP. Due to variation in comparisons and outcomes among trials, there is insufficient evidence concerning the effects of other oral care solutions.

AUTHORS' CONCLUSIONS

OHC including chlorhexidine mouthwash or gel reduces the risk of developing ventilator-associated pneumonia in critically ill patients from 25% to about 19%. However, there is no evidence of a difference in the outcomes of mortality, duration of mechanical ventilation or duration of ICU stay. There is no evidence that OHC including both antiseptics and toothbrushing is different from OHC with antiseptics alone, and some weak evidence to suggest that povidone iodine mouthrinse is more effective than saline/placebo, and saline rinse is more effective than saline swab in reducing VAP. There is insufficient evidence to determine whether powered toothbrushing or other oral care solutions are effective in reducing VAP. There is also insufficient evidence to determine whether any of the interventions evaluated in the studies are associated with adverse effects.

Comparison of foam swabs and toothbrushes as oral hygiene interventions in mechanically ventilated patients: a randomised split mouth study

Introduction

During critical illness, dental plaque may serve as a reservoir of respiratory pathogens. This study compared the effectiveness of toothbrushing with a small-headed toothbrush or a foam-headed swab in mechanically ventilated patients.

Methods

This was a randomised, assessor-blinded, split-mouth trial, performed at a single critical care unit. Adult, orally intubated patients with >20 teeth, where >24 hours of mechanical ventilation was expected were included. Teeth were cleaned 12-hourly using a foam swab or toothbrush (each randomly assigned to one side of the mouth). Cleaning efficacy was based on plaque scores, gingival index and microbial plaque counts.

Results

High initial plaque (mean=2.1 (SD 0.45)) and gingival (mean=2.0 (SD 0.54)) scores were recorded for 21 patients. A significant reduction compared with initial plaque index occurred using both toothbrushes (mean change=−1.26, 95% CI −1.57 to −0.95; p<0.001) and foam swabs (mean change=−1.28, 95% CI −1.54 to −1.01; p<0.001). There was significant reduction in gingival index over time using toothbrushes (mean change=−0.92; 95% CI −1.19 to −0.64; p<0.001) and foam swabs (mean change=−0.85; 95% CI −1.10 to −0.61; p<0.001). Differences between cleaning methods were not statistically significant (p=0.12 for change in gingival index; p=0.24 for change in plaque index). There was no significant change in bacterial dental plaque counts between toothbrushing (mean change 3.7×10⁴ colony-forming units (CFUs); minimum to maximum (−2.5×10¹⁰ CFUs, 8.7×10⁷ CFUs)) and foam swabs (mean change 9×10⁴ CFUs; minimum to maximum (−3.1×10¹⁰ CFUs, 3.0×10⁷ CFUs)).

Conclusions

Patients admitted to adult intensive care had poor oral health, which improved after brushing with a toothbrush or foam swab. Both interventions were equally effective at removing plaque and reducing gingival inflammation.

Trial registration number

NCT01154257; Pre-results.

The impact of oral care on oral health status and prevention of ventilator-associated pneumonia in critically ill patients

BACKGROUND

Ventilator-associated pneumonia is one of the most common nosocomial infections which increase mortality rate and length stay of hospitalisation. Oral care would not only improve patient's oral health and well-being, but it can also reduce the incidence rate of ventilator-associated pneumonia.

OBJECTIVES

The objective of this study was to identify the impact of oral care practices on oral health status of patients in intensive care unit and the incidence rate of ventilator-associated pneumonia.

METHODS

This clinical trial recruited 100 participants who were randomly assigned to a control group (receiving oral care by nurses) and an intervention group (receiving systematic care by the researcher) during 2015-2016. Beck Oral Assessment Scale was used to determine the required number of times for receiving oral care with regard to patient's oral health in the intervention group. Each care included adjusting endotracheal tube cuff pressure, brushing with toothpaste, using antiseptics and moistening the lips. The oral cavity was examined using BOAS and Mucosal-Plaque Score, and Clinical Pulmonary Infection Score was used for detecting pneumonia.

RESULTS

The BOAS scoring showed significant differences between the two groups from the first to fifth day (P<0.001). The mucosal-plaque index was significantly different between the two groups from the third day to fifth day (P<0.001). The incidence rate of pneumonia on the third and fifth day was 10% (5) and 14% (7) in the control group, and 4% (2) and 10% (5) in the intervention group, respectively. The Fisher test did not show significant difference (P=0.538), however, the incidence rate in the intervention group reduced compared with the control group.

CONCLUSION

Although following a systematic oral care program could not significantly decrease the incidence of ventilator-associated pneumonia in critically ill patients compared to the conventional oral care practices, it significantly improved the oral health and mucosal-plaque index.

The effect of tooth brushing, irrigation, and topical tetracycline administration on the reduction of oral bacteria in mechanically ventilated patients: a preliminary study

Background

One of the main causes of ventilator-associated pneumonia (VAP) is thought to be aspiration of oropharyngeal fluid containing pathogenic microorganisms. The aim of this study was to examine the effects of various oral care methods on the reduction of oral bacteria during intubation.

Methods

First, the effect of mechanical oral cleaning was investigated. The bacterial count on the tongue and in the oropharyngeal fluid was measured after tooth brushing, irrigation, and three hours after irrigation in mechanically ventilated patients at the intensive care unit (ICU).

Next, the efficacy of topical administration of tetracycline and povidone iodine on the inhibition of bacterial growth on the tongue and in the oropharyngeal fluid was examined in oral cancer patients during neck dissection.

Results

The number of bacteria in the oropharyngeal fluid was approximately 10⁵–10⁶ cfu/mL before surgery, but increased to 10⁸ cfu/mL after intubation. Oral care with tooth brushing and mucosal cleaning did not reduce oral bacteria, while irrigation of the oral cavity and oropharynx significantly decreased it to a level of 10⁵ cfu/mL (p < 0.001). However, oral bacteria increased again to almost 10⁸ cfu/mL within three hours of irrigation.

Oral bacteria did not decrease by topical povidone iodine application. In contrast, 30 min after topical administration of tetracycline, the number of oral bacteria decreased to 10⁵ cfu/mL, and remained under 10⁶ cfu/mL throughout the entire experimental period of 150 min.

Conclusions

While the present studies are only preliminary, these results indicate that irrigation of the oral cavity and oropharynx followed by topical antibiotic administration may reduce oral bacteria in mechanically ventilated patients.

Trial registration

UMIN000018318, 1 August 2015.

Impact of selective digestive decontamination on respiratory tract Candida among patients with suspected ventilator-associated pneumonia. A meta-analysis

The purpose here is to establish the incidence of respiratory tract colonization with Candida (RT Candida) among ICU patients receiving mechanical ventilation within studies in the literature. Also of interest is its relationship with candidemia and the relative importance of topical antibiotic (TA) use as within studies of selective digestive decontamination (SDD) versus other candidate risk factors towards it. The incidence of RT Candida was extracted from component (control and intervention) groups decanted from studies of various TA and non-TA ICU infection prevention methods with summary estimates derived using random effects. A benchmark RT Candida incidence to provide overarching calibration was derived using (observational) groups from studies without any prevention method under study. A multi-level regression model of group level data was undertaken using generalized estimating equation (GEE) methods. RT Candida data were sourced from 113 studies. The benchmark RT Candida incidence is 1.3; 0.9-1.8 % (mean and 95 % confidence intervals). Membership of a concurrent control group of a study of SDD (p = 0.02), the group-wide presence of candidemia risk factors (p < 0.001), and proportion of trauma admissions (p = 0.004), but neither the year of study publication, nor membership of any other component group, nor the mode of respiratory sampling are predictive of the RT Candida incidence. RT Candida and candidemia incidences are correlated. RT Candida incidence can serve as a basis for benchmarking. Several relationships have been identified. The increased incidence among concurrent control groups of SDD studies cannot be appreciated in any single study examined in isolation.

The use of 2% chlorhexidine gel and toothbrushing for oral hygiene of patients receiving mechanical ventilation: effects on ventilator-associated pneumonia

Objective

To evaluate the effects of oral chlorhexidine hygiene with toothbrushing on the rate of ventilator-associated pneumonia in a mixed population of critically ill patients under prolonged mechanical ventilation.

Methods

Prospective, randomized, and placebo-controlled pilot study. Patients who were receiving mechanical ventilation, had been admitted less than 24 hours prior, and were anticipated to require mechanical ventilation for more than 72 hours were included in the study. The patients were randomly divided into one of the following groups: chlorhexidine hygiene with toothbrushing or a placebo group (gel with the same color and consistency and toothbrushing).

Results

The planned interim analysis was conducted using 52 patients, and the study was terminated prematurely. In total, 28 patients were included in the chlorhexidine / toothbrushing group, and 24 patients were included in the placebo group. Ventilator-associated pneumonia occurred in 45.8% of the placebo group and in 64.3% of the chlorhexidine hygiene with toothbrushing group (RR=1.4; 95% CI=0.83-2.34; p=0.29).

Conclusion

Because the study was terminated due to futility, it was not possible to evaluate the impact of oral hygiene using 2% chlorhexidine and toothbrushing on the incidence of ventilator-associated pneumonia in this heterogeneous population of critical patients receiving long-term mechanical ventilation, and no beneficial effect was observed for this intervention.

Oral care and nosocomial pneumonia: a systematic review

To perform a systematic review of the literature on the control of oral biofilms and the incidence of nosocomial pneumonia, in addition to assessing and classifying studies as to the grade of recommendation and level of evidence. The review was based on PubMed, LILACS, and Scopus databases, from January 1st, 2000 until December 31st, 2012. Studies evaluating oral hygiene care related to nosocomial infections in patients hospitalized in intensive care units were selected according to the inclusion criteria. Full published articles available in English, Spanish, or Portuguese, which approached chemical or mechanical oral hygiene techniques in preventing pneumonia, interventions performed, and their results were included. After analysis, the articles were classified according to level of evidence and grade of recommendation according to the criteria of the Oxford Centre for Evidence-Based Medicine. A total of 297 abstracts were found, 14 of which were full articles that met our criteria. Most articles included a study group with chlorhexidine users and a control group with placebo users for oral hygiene in the prevention of pneumonia. All articles were classified as B in the level of evidence, and 12 articles were classified as 2B and two articles as 2C in grade of recommendation. It was observed that the control of oral biofilm reduces the incidence of nosocomial pneumonia, but the fact that most articles had an intermediate grade of recommendation makes clear the need to conduct randomized controlled trials with minimal bias to establish future guidelines for oral hygiene in intensive care units.

Oral care for intubated patients: a survey of intensive care unit nurses

AIMS

This study aimed to determine attitudes and practices of intensive care unit (ICU) nurses towards provision of oral care for intubated patients.

BACKGROUND

Oral care is as an essential nursing intervention for intubated patients to maintain patient comfort and prevent colonization of dental plaque by respiratory pathogens.

DESIGN

This was a cross-sectional study.

METHODS

Data were collected from 93 ICU nurses of a teaching hospital in the East Coast of Peninsular Malaysia using a self-administered questionnaire.

RESULTS

Some nurses agreed that oral cavity of intubated patients was difficult (40·8%) and unpleasant (16·2%) to clean, but all of them realized the importance of oral care and the majority (97·9%) would like to learn more about it. Most nurses reported providing oral care at least two times daily using various methods and products such as suction toothbrush (90·4%), manual toothbrush (49·5%), cotton swab (91·5%) and foam swab (65·7%). Chlorhexidine gluconate oral rinse was the preferred mouthwash (97·8%) and swabs (93·5%) solution although few used non-optimal products such as sodium bicarbonate (14·0%), tap water (4·3%) and hydrogen peroxide (3·2%) to wash their patients' mouths. While the majority of nurses agreed that oral care supplies and equipments were available (93·6%) and suitable (88·2%), most of them also thought they need better hospital support (88·2%).

CONCLUSIONS

The nurses' attitudes towards oral care were generally positive and most oral care methods were appropriate. However, some methods and products used were inconsistent with the current recommendations and they have mixed views about the suitability of oral care supplies and equipment provided by the hospital.

RELEVANCE TO CLINICAL PRACTICE

Recommendations were made for providing standard oral care protocols for intubated patients and oral care training programs for ICU nurses to support delivery of quality patient care.

Oral hygiene care for critically ill patients to prevent ventilator-associated pneumonia

BACKGROUND

Ventilator-associated pneumonia (VAP) is defined as pneumonia developing in persons who have received mechanical ventilation for at least 48 hours. VAP is a potentially serious complication in these patients who are already critically ill. Oral hygiene care (OHC), using either a mouthrinse, gel, toothbrush, or combination, together with aspiration of secretions may reduce the risk of VAP in these patients.

OBJECTIVES

To assess the effects of OHC on the incidence of VAP in critically ill patients receiving mechanical ventilation in intensive care units (ICUs) in hospitals.

SEARCH METHODS

We searched the Cochrane Oral Health Group's Trials Register (to 14 January 2013), CENTRAL (The Cochrane Library 2012, Issue 12), MEDLINE (OVID) (1946 to 14 January 2013), EMBASE (OVID) (1980 to 14 January 2013), LILACS (BIREME) (1982 to 14 January 2013), CINAHL (EBSCO) (1980 to 14 January 2013), Chinese Biomedical Literature Database (1978 to 14 January 2013), China National Knowledge Infrastructure (1994 to 14 January 2013), Wan Fang Database (January 1984 to 14 January 2013), OpenGrey and ClinicalTrials.gov (to 14 January 2013). There were no restrictions regarding language or date of publication.

SELECTION CRITERIA

We included randomised controlled trials (RCTs) evaluating the effects of OHC (mouthrinse, swab, toothbrush or combination) in critically ill patients receiving mechanical ventilation.

DATA COLLECTION AND ANALYSIS

Two review authors independently assessed all search results, extracted data and undertook risk of bias. We contacted study authors for additional information. Trials with similar interventions and outcomes were pooled reporting odds ratios (OR) for dichotomous outcomes and mean differences (MD) for continuous outcomes using random-effects models unless there were fewer than four studies.

MAIN RESULTS

Thirty-five RCTs (5374 participants) were included. Five trials (14%) were assessed at low risk of bias, 17 studies (49%) were at high risk of bias, and 13 studies (37%) were assessed at unclear risk of bias in at least one domain. There were four main comparisons: chlorhexidine (CHX mouthrinse or gel) versus placebo/usual care, toothbrushing versus no toothbrushing, powered versus manual toothbrushing and comparisons of oral care solutions.There is moderate quality evidence from 17 RCTs (2402 participants, two at high, 11 at unclear and four at low risk of bias) that CHX mouthrinse or gel, as part of OHC, compared to placebo or usual care is associated with a reduction in VAP (OR 0.60, 95% confidence intervals (CI) 0.47 to 0.77, P < 0.001, I(2) = 21%). This is equivalent to a number needed to treat (NNT) of 15 (95% CI 10 to 34) indicating that for every 15 ventilated patients in intensive care receiving OHC including chlorhexidine, one outcome of VAP will be prevented. There is no evidence of a difference between CHX and placebo/usual care in the outcomes of mortality (OR 1.10, 95% CI 0.87 to 1.38, P = 0.44, I(2) = 2%, 15 RCTs, moderate quality evidence), duration of mechanical ventilation (MD 0.09, 95% CI -0.84 to 1.01 days, P = 0.85, I(2) = 24%, six RCTs, moderate quality evidence), or duration of ICU stay (MD -0.21, 95% CI -1.48 to 1.89 days, P = 0.81, I(2) = 9%, six RCTs, moderate quality evidence). There was insufficient evidence to determine whether there is a difference between CHX and placebo/usual care in the outcomes of duration of use of systemic antibiotics, oral health indices, microbiological cultures, caregivers preferences or cost. Only three studies reported any adverse effects, and these were mild with similar frequency in CHX and control groups.From three trials of children aged from 0 to 15 years (342 participants, moderate quality evidence) there is no evidence of a difference between OHC with CHX and placebo for the outcomes of VAP (OR 1.07, 95% CI 0.65 to 1.77, P = 0.79, I(2) = 0%), or mortality (OR 0.73, 95% CI 0.41 to 1.30, P = 0.28, I(2) = 0%), and insufficient evidence to determine the effect on the outcomes of duration of ventilation, duration of ICU stay, use of systemic antibiotics, plaque index, microbiological cultures or adverse effects, in children.Based on four RCTs (828 participants, low quality evidence) there is no evidence of a difference between OHC including toothbrushing (± CHX) compared to OHC without toothbrushing (± CHX) for the outcome of VAP (OR 0.69, 95% CI 0.36 to 1.29, P = 0.24 , I(2) = 64%) and no evidence of a difference for mortality (OR 0.85, 95% CI 0.62 to 1.16, P = 0.31, I(2) = 0%, four RCTs, moderate quality evidence). There is insufficient evidence to determine whether there is a difference due to toothbrushing for the outcomes of duration of mechanical ventilation, duration of ICU stay, use of systemic antibiotics, oral health indices, microbiological cultures, adverse effects, caregivers preferences or cost.Only one trial compared use of a powered toothbrush with a manual toothbrush providing insufficient evidence to determine the effect on any of the outcomes of this review.A range of other oral care solutions were compared. There is some weak evidence that povidone iodine mouthrinse is more effective than saline in reducing VAP (OR 0.35, 95% CI 0.19 to 0.65, P = 0.0009, I(2) = 53%) (two studies, 206 participants, high risk of bias). Due to the variation in comparisons and outcomes among the trials in this group there is insufficient evidence concerning the effects of other oral care solutions on the outcomes of this review.

AUTHORS' CONCLUSIONS

Effective OHC is important for ventilated patients in intensive care. OHC that includes either chlorhexidine mouthwash or gel is associated with a 40% reduction in the odds of developing ventilator-associated pneumonia in critically ill adults. However, there is no evidence of a difference in the outcomes of mortality, duration of mechanical ventilation or duration of ICU stay. There is no evidence that OHC including both CHX and toothbrushing is different from OHC with CHX alone, and some weak evidence to suggest that povidone iodine mouthrinse is more effective than saline in reducing VAP. There is insufficient evidence to determine whether powered toothbrushing or other oral care solutions are effective in reducing VAP.

Toothbrushing for critically ill mechanically ventilated patients: a systematic review and meta-analysis of randomized trials evaluating ventilator-associated pneumonia

BACKGROUND

Oral care may decrease ventilator-associated pneumonia in the ICU. The objective of this review was to summarize and critically appraise randomized trials in mechanically ventilated patients in the ICU testing the effect of oral care strategies involving toothbrushing on ventilator-associated pneumonia.

SEARCH METHODS

We searched EMBASE, MEDLINE, and the Cochrane Controlled Trials Register and Database of Systematic Reviews from 1980 until March 2012, independently and in duplicate, as well as personal files and reference lists. In duplicate, articles were selected if they were randomized trials, enrolled adult critically ill patients, compared any kind of oral care involving toothbrushing with any other kind of oral care or control with or without toothbrushing, and examined ventilator-associated pneumonia. In duplicate, we abstracted trial characteristics and quality using the Cochrane risk of bias tool. The results were combined using a random effects model.

RESULTS

We included six trials enrolling 1,408 patients, five of which compared toothbrushing to usual oral care and one of which compared electric with manual toothbrushing. In four trials, there was a trend toward lower ventilator-associated pneumonia rates (risk ratio, 0.77; 95% confidence interval, 0.50-1.21; p = 0.26). This trend was also observed in one trial reporting fewer cases of ventilator-associated pneumonia per 1,000 ventilator days (20.68 vs. 25.89; p = 0.53) in patients receiving toothbrushing vs. no toothbrushing. The only trial with low risk of bias suggested that toothbrushing significantly reduced ventilator-associated pneumonia (risk ratio, 0.26; 95% confidence interval, 0.10-0.67; p = 0.006). Use of chlorhexidine antisepsis seems to attenuate the effect of toothbrushing on ventilator-associated pneumonia (p for the interaction = 0.02). One trial comparing electric vs. manual toothbrushing showed no difference in ventilator-associated pneumonia rates (risk ratio, 0.96; 95% confidence interval, 0.47-1.96; p = 0.91). Toothbrushing did not impact on length of ICU stay, or ICU or hospital mortality.

CONCLUSIONS

In intubated, mechanically ventilated critically ill patients, toothbrushing did not significantly reduce the risk of ventilator-associated pneumonia overall. Toothbrushing has no effect on mortality or length of stay. Electric and manual toothbrushing seem to have similar effects. More research is needed on this aspect of oral care to evaluate its potential to decrease ventilator-associated pneumonia.

Common complications in the critically ill patient

Critically ill patients in intensive care units are subject to many complications associated with therapy. Many of these complications are health care-associated infections and are related to indwelling devices, including ventilator-associated pneumonia, central line-associated bloodstream infection, catheter-associated urinary tract infection; surgical site infection, venous thromboembolism, deep venous thrombosis, and pulmonary embolus are other common complications. All efforts should be undertaken to prevent these complications in surgical critical care, and national efforts are under way for each of these complications. In this article, epidemiology, risk factors, diagnosis, treatment, and prevention of these complications in critically ill patients are discussed.

Oral care and pulmonary infection - the importance of plaque scoring

Improving the quality of oral hygiene is recognised as an important counter measure for reducing the incidence of ventilator-associated pneumonia amongst critically ill patients. Toothbrushing physically disrupts the dental plaque that acts as a reservoir for pulmonary infection and therefore has the potential to reduce the incidence of ventilator-associated pneumonia. Gu and colleagues performed a systematic review and meta-analysis of oral hygiene with and without a toothbrush and found no difference in the incidence of pneumonia in mechanically ventilated patients. The diagnosis of ventilator-associated pneumonia is prone to bias and future studies of oral care interventions should focus on measures of oral cleanliness such as plaque and gingival scores. Once the optimal strategy for oral hygiene is defined in the critically ill, larger studies focussing on ventilator-associated pneumonia or mortality can be conducted.

Impact of oral care with versus without toothbrushing on the prevention of ventilator-associated pneumonia: a systematic review and meta-analysis of randomized controlled trials

INTRODUCTION

Ventilator-associated pneumonia (VAP) remains a common hazardous complication in mechanically ventilated patients and is associated with increased morbidity and mortality. We undertook a systematic review and meta-analysis of randomized controlled trials to assess the effect of toothbrushing as a component of oral care on the prevention of VAP in adult critically ill patients.

METHODS

A systematic literature search of PubMed and Embase (up to April 2012) was conducted. Eligible studies were randomized controlled trials of mechanically ventilated adult patients receiving oral care with toothbrushing. Relative risks (RRs), weighted mean differences (WMDs), and 95% confidence intervals (CIs) were calculated and heterogeneity was assessed with the I(2) test.

RESULTS

Four studies with a total of 828 patients met the inclusion criteria. Toothbrushing did not significantly reduce the incidence of VAP (RR, 0.77; 95% CI, 0.50 to 1.21) and intensive care unit mortality (RR, 0.88; 95% CI, 0.70 to 1.10). Toothbrushing was not associated with a statistically significant reduction in duration of mechanical ventilation (WMD, -0.88 days; 95% CI, -2.58 to 0.82), length of intensive care unit stay (WMD, -1.48 days; 95% CI, -3.40 to 0.45), antibiotic-free day (WMD, -0.52 days; 95% CI, -2.82 to 1.79), or mechanical ventilation-free day (WMD, -0.43 days; 95% CI, -1.23 to 0.36).

CONCLUSIONS

Oral care with toothbrushing versus without toothbrushing does not significantly reduce the incidence of VAP and alter other important clinical outcomes in mechanically ventilated patients. However, the results should be interpreted cautiously since relevant evidence is still limited, although accumulating. Further large-scale, well-designed randomized controlled trials are urgently needed.