Is discard better than return gastric residual aspirates: a systematic review and meta-analysis.

BACKGROUND: The assessment of residual gastric volume is common practice in critical care units. However, the effects and safety of discarding or returning gastric aspirates remain uncertain. Therefore, we aimed to evaluate the role of discarding or returning gastric aspirates on the gastric residual volumes in critically ill patients. METHODS: A comprehensive, systematic meta-analysis of randomized controlled trials (RCTs) on the efficacy and safety of discarding or returning gastric aspirates in critical ill patients was performed. Studies were identified by searching Pubmed and other databases (from inception to 31 Sept 2018). Summary odd ratios (ORs) or mean differences (MDs) with 95% confidence intervals were calculated using fixed- or random-effects model for outcome assessment. RESULTS: Four RCTs, with a total number of 314 adult patients, were included in the analysis. No significant differences were found in the 48th hour residual volume (MD = 8.89, 95% CI: 11.97 to 29.74), the average potassium level (MD = 0.00, 95% CI: - 0.16 to 0.16), the episodes of gastric emptying delay (OR = 0.98, 95% CI: 0.35 to 2.80), the incidence of aspiration pneumonia (OR = 0.93, 95% CI: 0.14 to 6.17), the episodes of nausea or vomiting (OR = 0.53, 95% CI: 0.07 to 4.13) and diarrhea (OR = 0.99, 95% CI: 0.58 to 1.70). CONCLUSIONS: No evidence confirms that returning residual gastric aspirates provides more benefits than discarding them without increasing potential complications. Rigorously designed, multi-center, large-sample randomized controlled trials must be further conducted to validate the role of discarding or returning residual gastric aspirates.

Chlorhexidine-impregnated dressing for the prophylaxis of central venous catheter-related complications: a systematic review and meta-analysis.

BACKGROUND: Several randomized controlled trials (RCTs) evaluated the role of Chlorhexidine-impregnated dressing for prophylaxis of central venous catheter (CVC) related complications, but the results remained inconsistent, updated meta-analyses on this issue are warranted. METHODS: A meta-analysis on the RCTs comparing Chlorhexidine-impregnated dressing versus other dressing or no dressing for prophylaxis of central venous catheter-related complications was performed. A comprehensive search of major databases was undertaken up to 30 Dec 2018 to identify related studies. Pooled odd ratio (OR) and mean differences (MDs) with 95% confidence intervals (CI) were calculated using either a fixed-effects or random-effects model. Subgroup analysis was performed to identify the source of heterogeneity, and funnel plot and Egger test was used to identify the publication bias. RESULTS: A total of 12 RCTs with 6028 patients were included. The Chlorhexidine-impregnated dressings provided significant benefits in reducing the risk of catheter colonization (OR = 0.46, 95% CI: 0.36 to 0.58), decreasing the incidence of catheter-related bloodstream infection (CRBSI) (OR = 0.60, 95% CI: 0.42 to 0.85). Subgroup analysis indicated that the Chlorhexidine-impregnated dressings were conducive to reduce the risk of catheter colonization and CRBSI within the included RCTs with sample size more than 200, but the differences weren't observed for those with sample less than 200. No publication bias was observed in the Egger test for the risk of CRBSI. CONCLUSIONS: Chlorhexidine-impregnated dressing is beneficial to prevent CVC-related complications. Future studies are warranted to assess the role and cost-effectiveness of Chlorhexidine-impregnated dressings.

Humidified versus nonhumidified low-flow oxygen therapy in children with Pierre-Robin syndrome: Study protocol for a randomised controlled trial.

AIMS AND OBJECTIVES: To evaluate the necessity of oxygen humidification for low-flow oxygen therapy in children with Pierre-Robin syndrome. BACKGROUND: Whether to carry out humidification or not in the low-flow oxygen delivery remains unclear, and currently, there is no published study on this issue in the population of children. Therefore, it is necessary to conduct more studies to elucidate this issue. DESIGN: A randomised controlled trial. METHODS: We attempt to report this randomised controlled trial to comply with the Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT). 188 children with Pierre-Robin syndrome will be expected to inclusion. The participants will be randomly divided into the humidified group (n = 94) and nonhumidified group (n = 94) at a ratio of 1:1. For humidified group, the oxygen will be routinely humidified with disposable bottle containing sterile water, whereas for nonhumidified group, the oxygen will not be humidified. Average arterial oxygen partial pressure (PaO2 ) and carbon dioxide partial pressure (PaCO2 ), incidence of ventilator-associated pneumonia (VAP), nasal cavity dryness, nasal mucosal bleeding and bacterial contamination of the humidified bottle, the cost of nasal oxygen therapy and duration of ICU stay are collected and analysed. RESULTS: The study is planned to start in May 2019, and the results will be expected in July 2020. CONCLUSIONS: This study is expected to provide a credible evidence on the necessity of routine oxygen humidification in low-flow oxygen delivery. RELEVANCE TO CLINICAL PRACTICE: Understanding the role of oxygen humidification and no humidification for low-flow oxygen therapy in the population of children is beneficial to the nursing care of healthcare providers in clinical setting.

Is continuous better than intermittent control of tracheal cuff pressure? A meta-analysis.

AIM: To compare and evaluate the efficacy and safety of continuous and intermittent control of cuff pressure. METHODS: We performed a comprehensive and systematic meta-analysis of randomized controlled trials (RCTs) assessing the continuous and intermittent control of Pcuff by searching PUBMED, EMBASE and other such databases (from inception to 31 March 2018). Summary odds ratios or mean differences with 95% confidence intervals were calculated using a fixed- or random-effects model. MEASUREMENTS AND MAIN RESULTS: Seven randomised controlled trials with 970 mechanically ventilated patients were included in this study. The continuous control of cuff pressure significantly reduced the incidence of cuff pressure < 20 cm H2 O (0.03 (OR) (95% CI: 0.01-0.07)), Pcuff > 30 cm H2 O (0.06 (95% CI: 0.03-0.15)) and VAP (0.39 (95% CI: 0.28-0.55)) when compared with intermittent control of cuff pressure. No significant differences in duration of MV (-1.94 (95% CI: -4.06 to -0.17)), length of ICU stay (-3.88 (95% CI: -9.00 to -1.23)) and mortality (0.99 (95% CI: 0.73-1.35)) were found between the two groups. CONCLUSIONS: Continuous control of cuff pressure offers more benefits in stabilizing the cuff pressure and reducing the incidence of VAP, and more studies are warranted to further evaluate the role of continuous control of cuff pressure. RELEVANCE TO PRACTICE: The continuous control of cuff pressure should be conducted whenever possible as it is the most ideal for the prognosis of MV patients.

Is Donated Breast Milk Better Than Formula for Feeding Very Low Birth Weight Infants? A Systematic Review and Meta-Analysis.

BACKGROUND: The role of donated breast milk and formula feeding in very low birth weight infants (VLBWIs) remains unclear. OBJECTIVE: The objective for this study was to evaluate the efficacy and safety of breast milk and formula for feeding VLBWIs. METHODS: A comprehensive search of PubMed databases was conducted on November 30, 2018, to identify related randomized controlled trials (RCTs). Pooled odds ratio (OR) and mean differences (MD) with 95% confidence intervals (CI) were calculated using either a fixed or random-effects model. RESULTS: Seven RCTs with a total of 876 infants were included. The formula showed more advantages in increasing infant weight (MD = -6.58, 95% CI: -11.19 to -1.98) and length (MD = -0.30, 95% CI: -0.41 to -0.20) than donated breast milk, but formula could also significantly increase the risks of necrotizing enterocolitis (OR = 0.33, 95% CI: 0.18 to 0.59) and length of hospital stay (MD = -3.78, 95% CI: -6.84 to -0.72) when compared with donated breast milk. No significant differences on the head circumference gain (MD = -0.16, 95% CI: -0.33 to 0.01), sepsis (OR = 1.21, 95% CI: 0.84 to 1.75), retinopathy of prematurity (OR = 1.22, 95% CI: 0.73 to 2.05) and mortality (OR = 0.84, 95% CI: 0.47 to 1.52) were found. LINKING EVIDENCE TO ACTION: The donated breast milk shows more advantages in reducing the incidence of NEC and length of hospital stay, but also more disadvantages in increasing the weight and length of VLBWIs and ELBWIs when compared with preterm formula feeding. Currently, there is no solid evidence demonstrating a significant advantage of donated breast milk over formula in the feeding of VLBWIs. Larger-scale RCTs with rigorous designs are needed to elucidate the feeding plans of VLBWIs.

Roles of citric acid in conjunction with saline nebulization in experimental tracheostomy in guinea pigs.

PURPOSE: Tracheostomy usually accompanied by the impairment of cough reflex, which may affect the clearance of secretions and result in the occurrence and development of pulmonary inflammation. Previous research has demonstrated that citric acid could effectively evoke cough. However, there are limited data available on this topic specific to the cough stimulation method, and the roles of citric acid in tracheostomy still remain obscure. The aims of present study were to identify the potential roles of citric acid in conjunction with saline nebulization in tracheostomy in guinea pigs. MATERIALS AND METHODS: Experimental tracheostomy model was induced in guinea pigs, and different nebulization interventions were implemented. The expression of P-selectin and platelet count were analyzed by flow cytometer and automatic globulimeter, the histological changes in trachea and lung tissue were assessed by hematoxylin and eosin staining, and the inflammatory cytokines and substance P (SP) levels in bronchoalveolar lavage fluid were evaluated by enzyme-linked immunosorbent assay. RESULTS: Tracheostomy resulted in the disorder of trachea mucosa and cilia, the inflammatory cell infiltration in lung tissue, the increase of IL-6, TNF-α levels and the decrease of SP level. Citric acid alone increase the SP level, and the joint action of citric acid and saline nebulization further showed significantly beneficial effects on pathological, inflammatory changes and SP level. CONCLUSIONS: Citric acid combined with saline nebulization contributes to the alleviation of tracheotomy-induced tracheal damage and pulmonary inflammation in an experimental tracheostomy model in guinea pigs. This may provide novel insights into the inflammation management and cough recovery after tracheostomy.

P2X7 Participates in Intracerebral Hemorrhage-Induced Secondary Brain Injury in Rats via MAPKs Signaling Pathways.

This study aimed to study the role of P2X7 in intracerebral hemorrhage (ICH)-induced secondary brain injury (SBI) and the underlying mechanisms. An autologous blood injection was used to induce ICH model in Sprague-Dawley rats, and cultured primary rat cortical neurons were exposed to oxyhemoglobin to mimic ICH in vitro. siRNA interference and over-expression of P2X7, agonists and antagonists of P2X7, p38 MAPK and ERK were exploited. The protein levels were assessed using Western blotting and immunofluorescence staining. Terminal deoxynucleotidyl transferase dUTP nick end labeling staining and Fluoro-Jade B were conducted to detect apoptotic and degenerating neurons. The protein levels of P2X7, phosphorylated p38, ERK, active caspase-3 and NF-κB were significantly increased by ICH, which could be further increased by BzATP (P2X7 agonist) and reduced by BBG (P2X7 antagonist). And BzATP demonstrated a significant increase in cell death ratio and brain water content, while BBG led to a reverse results. In addition, Over- P2X7 increased the levels of P2X7, phosphorylated p38, ERK, active caspase-3 and NF-κB, and aggravated cell apoptosis, while si P2X7 resulted in opposite effects. Finally, the protein levels of phosphorylated P38 and active caspase 3 were decreased by BzATP plus Hydrochloride (p38 MAPK antagonist) and increased vy BBG plus Asiatic acid (p38 MAPK agonist), while the protein levels of phosphorylated ERK and NF-κB were decreased with BzATP plus Nimbolide (ERK antagonist) and increased with BBG plus Saikosaponin C (ERK agonist). This study demonstrates that inhibition of P2X7 could prevent ICH-induced SBI via MAPKs signaling pathway.

Chewing gum for intestinal function recovery after caesarean section: a systematic review and meta-analysis.

BACKGROUND: Gum chewing has been reported to enhance the intestinal function recovery after caesarean section, current perspectives and practice guidelines vary widely on the use of gum chewing, more studies on the role of gum chewing after caesarean section are needed. METHODS: We performed a comprehensive, systematic meta-analysis of randomized controlled trials (RCTs) on the efficacy of gum chewing after caesarean section. Studies were identified by searching EMBASE et al database (until June 30, 2016). Summary odd ratios or weighted mean differences with 95% confidence intervals were calculated for each outcome with fixed- or random-effects model. RESULTS: Ten RCTs with a total of 1659 women were included in our meta-analysis. Gum chewing provided significant benefits in reducing the time to first passage of flatus, first defecation, first bowel sound, first bowel movement and the length of hospital stay, but not in the time to first feeling of hunger. CONCLUSIONS: Gun chewing hastens the intestinal function recovery after caesarean section and offers a safe and inexpensive option. High-quality and larger-scale RCTs are still warranted to clarify the role of gum chewing in intestinal function recovery after caesarean section.

Therapeutic Potentials of Synapses after Traumatic Brain Injury: A Comprehensive Review.

Massive studies have focused on the understanding of the pathobiology of cellular and molecular changes and injury mechanisms after traumatic brain injury (TBI), but very few studies have specially discussed the role of synapses in the context of TBI. This paper specifically highlights the role and therapeutic potentials of synapses after TBI. First, we review and conclude how synapses interact with constant structural, metabolic, neuroendocrine, and inflammatory mechanisms after TBI. Second, we briefly describe several key synaptic proteins involved in neuroplasticity, which may be novel neuronal targets for specific intervention. Third, we address therapeutic interventions in association with synapses after TBI. Finally, we concisely discuss the study gaps in the synapses after TBI, in hopes that this would provide more insights for future studies. Synapses play an important role in TBI; while the understandings on the synaptic participation in the treatments and prognosis of TBI are lacking, more studies in this area are warranted.

Is humidified better than non-humidified low-flow oxygen therapy? A systematic review and meta-analysis.

AIMS: To determine the effects of low-flow oxygen therapy with humidified or non-humidified oxygen in adult patients. BACKGROUND: Although non-humidified oxygen in low-flow oxygen therapy is recommended by many guidelines, humidifying oxygen regardless of oxygen flow has been routinely performed in China and Japan and further studies are needed to evaluate the evidence. DESIGN: A systematic review and meta-analysis that comply with the recommendations of the Cochrane Collaboration were conducted. DATA SOURCES: Studies (1980-2016) were identified by searching PUBMED, EMBASE, Science Direct, Cochrane library, CNKI and Wanfang Database. METHODS: We performed a comprehensive, systematic meta-analysis of randomized controlled trials on the efficacy of humidified and non-humidified low-flow oxygen therapy. Summary risk ratios or weighted mean differences with 95% confidence intervals were calculated using a fixed- or random-effects model. RESULTS: Twenty-seven randomized controlled trials with a total number of 8,876 patients were included. Non-humidified oxygen offers more benefits in reducing the bacterial contamination of humidifier bottles, as shown by the mean operating time for oxygen administration and the respiratory infections compared with humidified oxygen therapy. No significant differences were found in dry nose, dry nose and throat, nosebleed, chest discomfort, the smell of oxygen and SpO2 changes. CONCLUSIONS: The routine humidification of oxygen in low-flow oxygen therapy is not justifiable and non-humidified oxygen tends to be more beneficial. However, considering that the quality of most included studies is poor, rigorously designed, large-scale randomized controlled trials are still needed to identify the role of non-humidified oxygen therapy.

The physician-nurse collaboration in feeding critically ill patients: A multicenter survey.

AIMS: Describe physician-nurse collaboration in feeding critically ill patients and explore the influence factors related to this collaboration, which can provide information for clinical practice and future studies. BACKGROUND: Appropriate nutrition support is essential and significant for critically ill patients, and the importance of physician-nurse collaboration in other fields has been confirmed, yet there are limited studies put insights into the status of physician-nurse collaboration in feeding critically ill patients. METHODS: A cross-sectional survey with a covering of 15 hospitals was conducted. A 21-item questionnaire was administered to physicians and nurses in critical care units. Descriptive statistics, univariate and multiple stepwise regression analysis were performed to evaluate the physician-nurse collaboration in feeding critically ill patients. RESULTS: A total of 331 respondents completed the questionnaire. Nurses and physicians were found to have differing perceptions of the physician-nurse collaboration in feeding critically ill patients, with nurses reporting lower levels of collaboration. Nurses consistently gave more negative responses on every survey question compared with physicians. Age, education and clinical experience significantly influenced the nurses' perceptions of cooperation, and age, education, ICU type, and seniority affected the physicians' perceptions of collaboration. CONCLUSIONS: Physicians, nurses and hospital administrators should highlight the physician-nurse collaboration in feeding critically ill patients and reinforce the cooperation based on potential influencing factors. Further research is required to establish feasible cooperative protocol and evaluate the effectiveness of the approach.

Development of an Animal Model for Inducing Various Degrees of Severity of Incontinence-Associated Dermatitis.

PURPOSE: The purpose of this study was to describe the biological changes after incontinence-associated dermatitis (IAD) induction by pancreatin in the guinea pigs and to explore the potentially appropriate timing and pancreatin concentration for IAD induction with different severity. DESIGN: In vivo, experimental study. SUBJECTS AND SETTING: An experimental animal model (guinea pig) in a controlled laboratory setting was used for investigation. METHODS: We developed an IAD model in guinea pigs by occluded application of 1%, 5%, and 10% pancreatin solutions for 1, 3, and 5 days, respectively. The irritant was applied to the posterior aspect of shaved guinea pigs. We used an adapted visual scoring system to evaluate IAD and its severity. We also measured differences of the fluid absorption rate as a proxy for transepidermal water loss and enzyme-linked immunosorbent assays of interleukin 2 and interferon-γ expression as indicators of IAD-related inflammation. Analysis of variance (ANOVA) was used to examine group differences. RESULTS: Higher pancreatin concentrations led to more severe skin responses and higher mean visual scale scores, yet the statistically score differences were only observed in the 1% and 5% pancreatin groups after 3 and 5 days of exposure compared with 1 day of exposure (P < .05). The average absorbed fluid rate increased from 1 to 3 days of exposure and reached a plateau at 3 days; significant differences were observed in 3 and 5 days of exposure (P < .05) when compared with 1 day of exposure but not between 3 and 5 days of exposure. CONCLUSIONS: Exposure of a guinea pig animal model to 1%, 5%, and 10% pancreatin solutions over a 3-day period induced IAD with different levels of severity. Additional studies using this model are warranted.

The role of osmolality in saline fluid nebulization after tracheostomy: time for changing?

BACKGROUND: Saline fluid nebulization is highly recommend to combat the complications following tracheostomy, yet the understandings on the role of osmolality in saline solution for nebulization remain unclear. OBJECTIVES: To investigate the biological changes in the early stage after tracheostomy, to verify the efficacy of saline fluid nebulization and explore the potential role of osmolality of saline nebulization after tracheostomy. METHODS: Sprague-Dawley rats undergone tracheostomy were taken for study model, the sputum viscosity was detected by rotational viscometer, the expressions of TNF-α, AQP4 in bronchoalveolar lavage fluid were assessed by western blot analysis, and the histological changes in endothelium were evaluated by HE staining and scanning electron microscopy (SEM). RESULTS: Study results revealed that tracheostomy gave rise to the increase of sputum viscosity, TNF-α and AQP4 expression, mucosa and cilia damage, yet the saline fluid nebulization could significantly decrease the changes of those indicators, besides, the hypertonic, isotonic and hypertonic saline nebulization produced different efficacy. CONCLUSIONS: Osmolality plays an important role in the saline fluid nebulization after tracheostomy, and 3% saline fluid nebulization seems to be more beneficial, further studies on the role of osmolality in saline fluid nebulization are warranted.

Effect of open versus closed endotracheal suctioning on intracranial pressure in severe brain-injured children: Study protocol for a randomized controlled trial.

AIM: To compare the effects and safety of open and closed endotracheal suction in children with severe brain injury. DESIGN: A single-blinding, single-centre randomized controlled trial (RCT). METHODS: The children with severe brain injury admitted to the intensive care unit (ICU) from 1 September 2020-31 August 2022 will be included. And a total of 172 children with severe brain injury are expected to be included. The intracranial pressure, SpO2 and heart rate before suctioning, at the end of suction, and at 5 and 10 min after suction, the estimated sputum volume for each suction, the incidence of ventilator-associated pneumonia, the duration of mechanical ventilation and the length of ICU stay will be analysed. RESULTS: This present RCT has been prospectively registered in China Clinical Trial Registry (http://www.chictr.org.cn, ChiCTR2000030963). This present study is expected to provide reliable evidence to the airway management in children with severe brain injury.

Nebulized versus invasively delivered surfactant therapy for neonatal respiratory distress syndrome: A systematic review and meta-analysis.

BACKGROUND: Pulmonary surfactant (PS) is commonly used for the treatment of neonatal respiratory distress syndrome (NRDS), several randomized controlled trials (RCTs) have evaluated the role of nebulized versus invasively delivered PS, yet the results remained inconsistent. Therefore, we aimed to conduct this meta-analysis to evaluate the effects and safety of nebulized versus invasively delivered PS in the treatment of NRDS. METHODS: We searched PubMed et al databases from inception date to May 15, 2020 for RCTs that compared nebulized vs invasively delivered PS. Two authors independently screened the studies and extracted data from the published articles. Summary odd ratios (OR) or mean differences (MDs) with 95% confidence intervals (CIs) were calculated for each outcome by means of fixed- or random-effects model. RESULTS: Two RCTs with a total of 95 preterm neonates were identified, with 48 neonates received PS nebulization and 47 neonates undergone invasive PS administration. There was no significant difference in the SpO2 level (MD = -0.44, 95% CI -6.01 to 5.12) and the A/APaO2 level (MD = 0.01, 95% CI -0.02 to 0.05) 1 hour after treatment among 2 groups. But the duration of mechanical ventilation in the nebulization groups was significantly less than that of invasive group (MD = -30.70, 95% CI -41.45 to 19.95). CONCLUSIONS: Given the limited evidences, the effects and safety of nebulized versus invasively delivered PS still need further verification.

Is routine nasogastric decompression after hepatic surgery necessary? A systematic review and meta-analysis.

OBJECTIVES: Currently the nasogastric tube (NGT) is routinely inserted in clinical after abdominal surgery for decompression in China, yet the practice varies between regions, the role of NGT for the patients after hepatic surgery remains unclear. Therefore, this present meta-analysis aimed to assess the efficacy and safety of NGT placement after hepatic surgery. DESIGN: A systematic review and meta-analysis DATA SOURCES: PUBMED, EMBASE, Science Direct, Cochrane Central Register of Controlled Trials, China National Knowledge Infrastructure (CNKI) and Wanfang Database (until Mar 30, 2019) were systematically searched. REVIEW METHODS: Randomized controlled studies (RCTs) comparing the efficacy and safety of NGT and no NGT treatment after hepatic surgery were included. Data were synthesized using a random-effects or fixed effect model according to the heterogeneity. Outcomes were presented as Mantel-Haenszel style odd ratios (ORs) or mean differences (MDs) with 95% confidence intervals (95% CIs). RESULTS: Seven studies with 1306 patients were eligible for inclusion. Compared with NGT treatment, the no NGT decompression could shorten the time to first defecation (MD -0.59; -0.79, -0.39), reduce the time to start diet (MD -0.46; -0.90, -0.03), and decrease the length of hospital stay (MD 0.48; -0.93, -0.03), but it could also increase the risk of NGT re-intubation (OR 6.8; 1.77, 26.72), no significant differences were detected on the first passage of flatus (MD -0.34; -0.86, 0.18), the incidence of nausea (OR 0.81; 0.40, 1.67), vomiting (OR 1.06; 0.19, 5.93), abdominal distention (OR 0.87; 0.60, 1.25). CONCLUSION: Given that very limited information for some endpoints in this present meta-analysis, the routinely insertion of NGT after hepatic surgery is not justified, the no NGT decompression seems to be more beneficial to the prognosis of patients after hepatic surgery, more related studies on this issue are needed.

The nasal oxygen practice in intensive care units in China: A multi-centered survey.

BACKGROUND: Nurses frequently administer nasal oxygen therapy for patients in intensive care units (ICUs). However, little is known about the current status, nurses' management and perception on the nasal oxygen therapy in China. Therefore, we aimed to investigate the nasal oxygen practice of ICUs in China to provide insights into future direction. METHODS: A cross-sectional survey on 10 hospitals was conducted. A self-designed questionnaire was administered to ICU nurses. Descriptive statistics, univariate, and multiple stepwise regression analyses were performed to analyze the respondents' questionnaires. RESULTS: A total of 580 respondents with a response rate of 96.67% were included in this study. The average correct answer rate was 58.28%. The current status of nasal oxygen administration in ICUs in Chinese hospitals lagged behind the recommendations of related guidelines. Nurses in China were eager to learn about the updated knowledge on oxygen therapy. The gender, age, clinical experience, degree, job title, and classification of working hospitals were not related to the oxygen therapy-related knowledge scores (all P>0.05). CONCLUSION: Many deficiencies are observed regarding the nasal oxygen practice in ICUs of Chinese hospitals. Increased efforts by authorities and medical staff are required to narrow the gap between the current status of oxygen practice and the recommendations from related guidelines.

Pannexin-1 is involved in neuronal apoptosis and degeneration in experimental intracerebral hemorrhage in rats.

Pannexins serve an important role in the regulation of extracellular neuronal regenerative currents and cellular signal transduction of glial cells; however, the effects of pannexins in various cerebrovascular diseases have not been reported. The present study focused on the expression and influence of pannexins in a rat model of intracerebral hemorrhage (ICH), and confirmed that pannexins (including Pannexin­1, Pannexin­2 and Pannexin­3) are expressed in rat brain tissues. However, only the expression of Pannexin­1 was significantly increased and peaked 48 h post­ICH. Following treatment with carbenoxolone (CBX), which is an inhibitor of Pannexin­1, apoptosis and neuronal degeneration in the brain tissues around the ICH hematoma decreased. The extent of secondary brain injury due to ICH was also alleviated. Compared with rats in the ICH­only group, recovery of neurocognitive functions improved significantly in the CBX­treated groups. Results from the present study suggested that the upregulation of Pannexin­1 expression may be involved in apoptosis and degeneration of neurons in the rat brain following ICH, and may contribute to subsequent cognitive dysfunction.

Chewing Gum for Intestinal Function Recovery after Colorectal Cancer Surgery: A Systematic Review and Meta-Analysis.

BACKGROUND: This meta-analysis was performed to assess the efficacy and safety of chewing gum in intestinal function recovery after colorectal cancer surgery. METHODS: A systematic search was conducted in PubMed, Embase, Science Direct, and Cochrane library for relevant randomized controlled trials (RCTs) published until April 2017. Summary risk ratios or weighted mean differences with 95% confidence intervals were used for continuous and dichotomous outcomes, respectively. RESULTS: 17 RCTs with a total number of 1845 patients were included. Gum chewing following colorectal cancer surgery significantly reduced the time to first passage of flatus (WMD -0.55; 95% CI -0.94 to -0.16; P = 0.006), first bowel movement (WMD -0.60; 95% CI -0.87 to -0.33; P < 0.0001), start feeding (WMD -1.32; 95% CI -2.18 to -0.46; P = 0.003), and the length of postoperative hospital stay (WMD -0.88; 95% CI -1.59 to -0.17; P = 0.01), but no obvious differences were found in postoperative nausea, vomiting, abdominal distention, pneumonia, and mortality, which were consistent with the findings of intention to treat analysis. CONCLUSIONS: Chewing gum could accelerate the recovery of intestinal function after colorectal cancer surgery. However, it confers no advantage in postoperative clinical complications. Further large-scale and high-quality RCTs should be conducted to confirm these results.

Continuous Versus Intermittent Subglottic Secretion Drainage to Prevent Ventilator-Associated Pneumonia: A Systematic Review.

BACKGROUND: Ventilator-associated pneumonia is associated with high morbidity and mortality in patients receiving mechanical ventilation. Subglottic secretion drainage, which may be performed continuously or intermittently, is believed to be an effective strategy for coping with ventilator-assisted pneumonia. Whether continuous or intermittent subglottic secretion drainage is superior for preventing ventilator-assisted pneumonia remains unknown. METHODS: This study is a comprehensive, systematic meta-analysis of randomized trials comparing continuous and intermittent subglottic secretion drainage in patients receiving mechanical ventilation. Studies in English and Chinese published from January 1970 through November 2015 were identified by searching multiple databases. Summary risk ratios or weighted mean differences with 95% CIs were used to calculate each outcome by means of fixed- or random-effects models. RESULTS: Eight studies enrolling a total of 1071 patients met the inclusion criteria. The summary risk ratio between continuous and intermittent subglottic secretion drainage for incidence of ventilator-assisted pneumonia was 0.83 (95% CI, 0.61-1.13); for time to ventilator-assisted pneumonia occurrence, 2.73 (95% CI, -0.39 to 5.85); for occult blood, 2.34 (95% CI, 0.25-21.88); for duration of mechanical ventilation, -0.89 (95% CI, -2.72 to 0.94); for length of intensive care unit stay, 3.98 (95% CI, -4.44 to 12.41); and for mortality, 0.80 (95% CI, 0.48-1.31). CONCLUSIONS: The results indicate no apparent differences between continuous and intermittent subglottic secretion drainage for the treatment outcomes included in the analysis. Rigorously designed, large-scale randomized controlled trials are warranted to identify the roles of continuous and intermittent subglottic secretion drainage.