Risk Factors For Respiratory Complications Research Articles

Increased risk of persistent pulmonary hypertension of the newborn in twin anaemia polycythaemia sequence donors.

Introduction This study aimed to describe the prevalence and risk factors for respiratory complications in monochorionic twins with twin anaemia polycythaemia sequence (TAPS). Methods All neonates diagnosed with postnatal TAPS at our centre between 2002 and 2023 were included in this retrospective study. The primary outcome was the prevalence of respiratory complications, including respiratory distress syndrome (RDS), bronchopulmonary dysplasia (BPD) and persistent pulmonary hypertension of the newborn (PPHN). Secondary outcomes included need of respiratory support during admission and a risk-factor analysis for adverse respiratory outcome. Results In our study of 100 postnatally diagnosed TAPS pregnancies, 32% (62/199) experienced RDS and 13% (25/199) had BPD, with no difference between donors and recipients. PPHN occurred in 7% of cases, more frequently in donors (11%, 11/100) than in recipients (3%, 3/100) (OR = 1.3, 95%CI 0.2-2.6). Lower gestational age at birth and severe fetal anaemia were found to be significant independent risk factors associated with PPHN in TAPS twins (OR = 0.3, 95%CI 0.1-0.5), respectively (OR = 1.9, 95%CI 0.8-3.1). Conclusion TAPS donor twins have a four-fold increased risk of PPHN due to anaemia compared to recipient twins. Given the life-threatening nature of PPHN, TAPS twins should be born in hospitals equipped to treat it.

Respiratory outcomes after cleft palate closure in Robin sequence: a retrospective study

ObjectivesThere is a paucity of information about the possible risk factors that could identify patients with Robin sequence (RS) who are more prone to developing obstructive airway complications after palate closure. This study aimed to compare the respiratory complication rates in patients with RS and isolated cleft palate (ICP).Materials and methodsIn this retrospective study, we reviewed the medical records of 243 consecutive patients with RS and ICP who were treated at Amsterdam University Medical Centers over the past 25 years. We collected preoperative data on previous treatment, diagnostic findings, surgical technique, weight, and presence of congenital anomalies.ResultsDuring cleft palate closure, patients with RS were older (11.9 versus 10.1 months; p = 0.001) and had a lower gestational age than those with ICP (37.7 versus 38.5 weeks; p = 0.002). Patients with RS had more respiratory complications (17 versus 5%; p = 0.005), were more often non-electively admitted to the pediatric intensive care unit (PICU) (13 versus 4.1%; p = 0.022), and had a longer hospital stay duration (3.7 versus 2.7 days; p = 0.011) than those with ICP. The identified risk factors for respiratory problems were a history of tongue-lip-adhesion (TLA) (p = 0.007) and a preoperative weight of < 8 kg (p = 0.015). Similar risk factors were identified for PICU admission (p = 0.015 and 0.004, respectively).ConclusionsThe possible risk factors for these outcomes were a low preoperative weight and history of TLA. Closer postoperative surveillance should be considered for patients with these risk factors.Clinical relevanceIdentifying risk factors for respiratory complications could provide clinicians better insight into their patients and allows them to provide optimal care for their patients.

Prediction of respiratory complications by quantifying lung contusion volume using chest computed tomography in patients with chest trauma

Pulmonary contusion is an important risk factor for respiratory complications in trauma patients. Hence, we aimed to determine the relationship between the ratio of pulmonary contusion volume to the total lung volume and patient outcomes and the predictability of respiratory complications. We retrospectively included 73 patients with a pulmonary contusion on chest computed tomography (CT) from 800 patients with chest trauma admitted to our facility between January 2019 and January 2020. Chest injury severity was expressed as the ratio of pulmonary contusion volume to total lung volume by quantifying pulmonary contusion volume on chest CT. The cut-off value was 80%. Among the 73 patients with pulmonary contusion (77% males, mean age: 45.3 years), 28 patients had pneumonia, and five had acute respiratory distress syndrome. The number of patients in the severe risk group with > 20% of pulmonary contusion volume was 38, among whom 23 had pneumonia. For predicting pneumonia, the area under the receiver operating characteristic curves for the ratio of pulmonary contusion volume was 0.85 (95% confidence interval 0.76–0.95, p = 0.008); the optimal threshold was 70.4%. Quantifying pulmonary contusion volume using initial CT enables identifying patients with chest trauma at high risk of delayed respiratory complications.

Postoperative monitoring after adenotonsillectomy of children with obstructive sleep apnea syndrome

Tonsillotomy or tonsillectomy, with or without adenoidectomy, is one of the most frequently performed procedure in the pediatric population. Obstructive sleep apnea is one of the main indications for these procedures. Respiratory problems following surgery are the most feared surgical complications. The criteria for identifying patients at risk of complications and the level of care required during monitoring remain controversial. This article reviews the literature on risk factors for respiratory complications. Recommendations for postoperative monitoring are proposed.

Wildfire Smoke Exposure Is Associated with Adverse Respiratory Events under General Anesthesia in At-risk Pediatric Patients.

Increasing wildfire activity worldwide has led to exposure to poor air quality and numerous detrimental health impacts. This study hypothesized an association between exposure to poor air quality from wildfire smoke and adverse respiratory events under general anesthesia in pediatric patients. This was a single-center retrospective double-cohort study examining two significant wildfire events in Northern California. Pediatric patients presenting for elective surgery during periods of unhealthy air quality were compared with those during periods of healthy air quality. The primary exposure, unhealthy air, was determined using local air quality sensors. The primary outcome was the occurrence of an adverse respiratory event under anesthesia. Secondary analysis included association with other known risk factors for adverse respiratory events. A total of 625 patients were included in the analysis. The overall risk of a respiratory complication was 42.4% (265 of 625). In children without a history of reactive airway disease, the risk of adverse respiratory events did not change during unhealthy air periods (102 of 253, 40.3%) compared with healthy air periods (95 of 226, 42.0%; relative risk 0.96 [0.77 to 1.19], P = 0.703). In children with a history of reactive airway disease, the risk of adverse respiratory events increased from 36.8% (25 of 68) during healthy air periods to 55.1% (43 of 78) during periods with unhealthy air (1.50 [1.04 to 2.17], P = 0.032). The effect of air quality on adverse respiratory events was significantly modified by reactive airways disease status (1.56 [1.02 to 2.40], P = 0.041). Pediatric patients with underlying risk factors for respiratory complications under general anesthesia had a greater incidence of adverse respiratory events during periods of unhealthy air quality caused by wildfire smoke. In this vulnerable patient population, postponing elective anesthetics should be considered when air quality is poor.

Association of multiple rib fractures with the frequency of pneumonia in the post-resuscitation period

PurposeSuccessful cardiopulmonary resuscitation is associated with a high incidence of chest wall injuries. However, few studies have examined chest wall injury as a risk factor for respiratory complications after cardiopulmonary resuscitation. Therefore, herein, we investigated the association of multiple rib fractures on the incidence of post-resuscitation pneumonia. MethodsThis single-centre retrospective cohort study enrolled adult, nontraumatic, out-of-hospital cardiac arrest patients who maintained circulation for more than 48 h between June 2015 and May 2019. Rib fractures were evaluated by computed tomography on the day of hospital admission. The association with newly developed pneumonia within 7 days of hospitalisation was analysed using a Fine-Gray proportional hazards regression model adjusted for the propensity score of multiple rib fractures estimated from age, sex, presence of witnessed status, bystander CPR, initial rhythm, and total CPR time and for previously reported risk factors for pneumonia (therapeutic hypothermia and prophylactic antibiotics). ResultsOverall, 683 patients with out-of-hospital cardiac arrest were treated; 87 eligible cases were enrolled for analysis. Thirty-two (36.8%) patients had multiple rib fractures identified on computed tomography, and 35 (40.2%) patients developed pneumonia. The presence of multiple rib fractures was significantly associated with a higher incidence of pneumonia, consistently both with and without adjustment for background factors (unadjusted hazard ratio 4.63, 95% confidence interval: 2.35–9.13, p < 0.001; adjusted hazard ratio 4.03, 95% confidence interval: 2.08–7.82, p < 0.001). ConclusionsMultiple rib fractures are independently associated with the development of pneumonia after successful resuscitation.

Long-term respiratory outcomes following solid organ transplantation in children: A retrospective cohort study.

Solid-organ transplantation (SOT) has become commonly used in children and is associated with excellent survival rates into adulthood. Data regarding long-term respiratory outcomes following pediatric transplantation are lacking. We aimed to describe the prevalence and nature of respiratory pathology following pediatric heart, kidney, and liver transplant, and identify potential risk factors for respiratory complications. Retrospective review involving all children under active follow-up at the provincial transplant service in British Columbia, Canada, following SOT. Of 118 children, 33% experienced respiratory complications, increasing to 54% in heart transplant recipients. Chronic or recurrent cough with persistent chest x-ray changes was the most common clinical picture, and most infections were with nonopportunistic organisms typically found in otherwise healthy children. A history of respiratory illness before transplant was significantly associated with risk of posttransplant respiratory complications. Eight percentage8% were diagnosed with bronchiectasis, which was more common in recipients of heart and kidney transplant. Bronchiectasis was associated with recurrent hospital admissions with lower respiratory tract infections, treatment of acute rejection episodes, and treatment with sirolimus. Respiratory morbidity is common after pediatric SOT, and bronchiectasis rates were disproportionately high in this patient group. We hypothesize that this relates to recurrent infections resulting from iatrogenic immunosuppression. Direct pulmonary toxicity from immunosuppression drugs may also be contributory. A high index of suspicion for respiratory complications is needed following childhood SOT, particularly in those with a history of respiratory disease before transplant, experiencing recurrent or severe respiratory tract infections, or exposed to intensified immunosuppression.

The pathological oral cavity as a preventable source of postoperative pneumonia in thoracic surgery: a prospective observational study.

BackgroundPneumonia after thoracic surgery considerably contributes to perioperative morbidity and mortality. So far, the forced expiratory volume in one second and diffusing capacity of the lungs for carbon dioxide are the most common validated prognosticators to estimate individual risk. Beyond functional parameters, modifiable risk factors for respiratory complications like pneumonia are poorly investigated in a prospective way. Thus, we aimed to assess the impact of oral health status in patients undergoing thoracic surgery and its correlation to perioperative outcomes.MethodsA prospective observational study included adult patients undergoing elective thoracic surgery from October 2, 2018 to April 29, 2020. The day before surgery, patients were examined by a dentist. Oral health status (caries, periodontal disease, tooth loss, and regular dental visits) was correlated with perioperative outcomes.ResultsDuring the study period, 230 consecutive patients were included. Oral health status was poor in the study population. Postoperative complications were associated with active caries [odds ratio (OR) 2.5, P<0.03]. Patients with frequent dental visits and treated teeth had a lower risk for postoperative complications compared with patients without regular visits (OR 0.3, P<0.02). Patients with a high burden of caries had a significantly increased risk for pneumonia (OR 7.9, P<0.002). The forced expiratory volume in one second was a significant prognosticator for postoperative complications; however, no association between the forced expiratory volume in one second and oral health parameters was observed.ConclusionsA pathological oral health status is a modifiable factor predicting postoperative complications and pneumonia. A prospective randomized interventional study is warranted to clarify whether an improvement in oral health status can lead to a reduction of perioperative risk.

Impact of Body Mass Index on Major Complications, Multiple Complications, In-hospital Mortality, and Failure to Rescue After Esophagectomy for Esophageal Cancer: A Nationwide Inpatient Database Study in Japan.

To examine the association of BMI with mortality and related outcomes after oncologic esophagectomy. Previous studies showed that high BMI was a risk factor for anastomotic leakage and low BMI was a risk factor for respiratory complications after esophagectomy. However, the association between BMI and in-hospital mortality after oncologic esophagectomy remains unclear. Data for patients who underwent esophagectomy for esophageal cancer between July 2010 and March 2019 were extracted from a Japanese nationwide inpatient database. Multivariate regression analyses and restricted cubic spline analyses were used to investigate the associations between BMI and short-term outcomes, adjusting for potential confounders. Among 39,406 eligible patients, in-hospital mortality, major complications, and multiple complications (≥2 major complications) occurred in 1069 (2.7%), 14,824 (37.6%), and 3621 (9.2%), respectively. Compared with normal weight (18.5-22.9 kg/m 2 ), severe underweight (<16.0 kg/m 2 ), mild/moderate underweight (16.0-18.4 kg/m 2 ), and obese (≥27.5 kg/m 2 )were significantly associated with higher in-hospital mortality [odds ratio 2.20 (95% confidence interval 1.65-2.94), 1.25 (1.01-1.49), and 1.48 (1.05-2.09), respectively]. BMI showed U-shaped dose-response associations with mortality, major complications, and multiple complications. BMI also showed a reverse J-shaped association with failure to rescue (death after major complications). Both high BMI and low BMI were associated with mortality, major complications and multiple complications after esophagectomy for esophageal cancer. Patients with low BMI were more likely to die once a major complication occurred. The present results can assist with risk stratification in patients undergoing oncologic esophagectomy.

Influence of caliber mismatch on patients' clinical course after sleeve lobectomy.

Respiratory complications are critical events after sleeve lobectomy. A caliber mismatch is an important factor in wound healing at the anastomotic site. This study aimed to determine the influence of caliber mismatches on patients' clinical courses after sleeve lobectomy. We investigated the clinical courses of 56 patients with primary lung cancer who underwent pulmonary resection with end-to-end bronchoplasty. Anastomoses between the main bronchus and the segmental, right upper or middle bronchus, and between the trunks intermedius and the segmental or middle bronchus are categorized as an "anastomosis with caliber mismatch". Among the 56 patients, 22 underwent bronchoplasty with caliber mismatch. There were no in-hospital deaths, and the mortality rates at the 30- and 90-day evaluations were zero. Respiratory complications (n = 10, 52%, p = 0.005), such as pneumonia (n = 7, 32%, p = 0.029), retention of pleural effusion (n = 6, 27%, p = 0.026) and bronchopleural fistula (n = 3, 14%, p = 0.027), were significantly increased after bronchoplasty with caliber mismatch. Lower body mass index (BMI) is a significant risk factor for respiratory complications after sleeve lobectomy with caliber mismatch (median value; 23.2 vs 21.2, p = 0.036). Significant respiratory complications are apparent after bronchoplasty with caliber mismatch, especially patients with low BMI have a high risk of respiratory complications. Appropriate patient selection and cautious perioperative management are mandatory for this type of lung-preserving surgery.

280. The risk factors of respiratory complications after posterior spine deformity surgery for patients with early onset scoliosis

BACKGROUND CONTEXT Early onset scoliosis (EOS) is associated with high morbidity and some of them require posterior spine deformity surgery (PSDS). Respiratory complications following PSDS are common, and have been reported in 15.6% to 28.2% of operative cases. Postoperative complications following PSDS may cause further impairment of respiratory function, leading to prolonged intubation time, need for reintubation, and longer inpatient hospital stay. PURPOSE We assumed that there were preoperative laboratory values and patient factors that are associated with postoperative respiratory complications (RCs) in EOS populations undergoing PSDS. To determine the risk factors of RC in EOS undergoing PSDS. STUDY DESIGN/SETTING A retrospective analysis with prospective outcomes research. PATIENT SAMPLE All patients who underwent PSDS for EOS in a single institute from 2008-2018. OUTCOME MEASURES Preoperative laboratory values for transferrin, prealbumin, hemoglobin/hematocrit, total protein, albumin, total lymphocyte count and blood loss to total blood volume ratio (BL/TBV) were collected. METHODS The spine surgery database was reviewed to identify all patients who underwent PSDS for EOS in a single institute from 2008-2018. RC was defined as postoperative pneumonia, pleural effusion, pneumothorax, need for reintubation, respiratory status requiring a return to the intensive care unit, or prolonged (>4-day) need for mechanical ventilation. Preoperative laboratory values for transferrin, prealbumin, hemoglobin/hematocrit, total protein, albumin, total lymphocyte count and blood loss to total blood volume ratio (BL/TBV) were collected. RESULTS There were 76 patients included in our study. Results of single-factor comparison demonstrated that the following seven variables were statistically different (P 15% (X9). The multi-factor unconditional logistic regression analysis revealed that X8 (OR=49.322), X9 (OR=18.423), X5 (OR= 11.883), and X6 (OR=8.769) were independent and positively correlated with the RC. CONCLUSIONS Albumin 15%, history of pneumonia and transferrin FDA DEVICE/DRUG STATUS This abstract does not discuss or include any applicable devices or drugs.

Respiratory Complications Among Living Liver Donors: A Single-Center Retrospective Observational Study.

The safety of living liver donors is considered a high priority. In this study, we aimed to highlight the incidence and risk factors of respiratory complications among living liver transplant donors at our institute. We evaluated data of 178 related living liver donors who were seen from January 2014 to December 2018. We recorded significant respiratory complications, such as pulmonary embolism, pleural effusion, pneumothorax, pneumonia, acute lung injury, acute respiratory distress syndrome, and transfusion-related acute lung injury. Complications were noted as clinically evident and/or needing intervention. We also recorded the frequency of nonrespiratory complications and duration of intensive care unit and hospital stays. Ten donors (5.6%) developed significant respiratory complications: 2 (1.1%) had pulmonary embolisms, 3 (1.7%) developed symptomatic pleural effusion that required thoracentesis, and 4 (2.25%) had chest infections. The remaining donor (0.6%) had unexplained respiratory insufficiency. Logistic regression analyses identified age ≥ 35 years and previous surgery as the main risk factors of significant respiratory complications. There were no recorded cases of pneumothorax, acute lung injury, acute respiratory distress syndrome, and transfusion-related acute lung injury. Raw surface collection (14.6%) and biliary leakage (7.9%) were the most frequent nonrespiratory complications. There was no significant difference between patients with and without significant respiratory complications with regard to intensive care unit and hospital stays. Despite the low incidence of significant respiratory complications among our living liver donor cohort, close monitoring and early management are essential to achieve better prognosis, especially in donors older than 35 years or those with previous surgery.

The use of Opioids in Total Knee Arthroplasty Patient: Main Characteristics, Risk Factors and Adverse Events

Opioids are frequently used for the treatment of preoperative and postoperative pain among patients undergoing total knee arthroplasty (TKA). The greatest risk for prolonged opioid use after TKA is preoperative opioid use. Despite the effectiveness of multimodal postoperative pain protocols, younger patients with preoperative history of narcotic use require additional opioids and are at a higher risk for complications and a greater length of stay. At 90 days, respiratory complications were the most common opioid-related adverse events (TKA: 6%; RTKA: 8%), followed by postoperative nausea and vomiting (TKA: 3%; RTKA: 4%), and urinary retention complications (TKA: 3%; RTKA: 3%). For TKA, risk factors for respiratory complications included older age, lower socioeconomic status, more comorbidities, obesity, chronic obstructive pulmonary disease, white race, and patients in the Midwest and West (vs. South). The average Medicare payment for treating complications within 90 days of a TKA was $6206 and $6222 following RTKA. Avoidance or weaning of preoperative opioids should be considered.

Hypoxic ventilatory response after rocuronium-induced partial neuromuscular blockade in men with obstructive sleep apnoea.

Obstructive sleep apnoea and residual neuromuscular blockade are, independently, known to be risk factors for respiratory complications after major surgery. Residual effects of neuromuscular blocking agents are known to reduce the hypoxic ventilatory response in healthy volunteers. Patients with obstructive sleep apnoea have impaired control of breathing, but it is not known to what extent neuromuscular blocking agents interfere with the regulation of breathing in such patients. In a physiological study in 10 unsedated men with untreated obstructive sleep apnoea, we wished to examine if partial neuromuscular blockade had an effect on hypoxic ventilatory response (isocapnic hypoxia to oxygen saturation of 80%) and hypercapnic ventilatory response (normoxic inspired carbon dioxide 5%). The hypoxic ventilatory response was reduced by 32% (p=0.016) during residual neuromuscular block (rocuronium to train-of-four ratio 0.7), but the hypercapnic ventilatory response was unaffected. We conclude that neuromuscular blockade specifically depresses peripheral chemosensitivity, and not respiratory muscle function since the hypercapnic ventilatory response was unaffected.

Thresholds for optimal fluid administration and weight gain after laparoscopic colorectal surgery

BackgroundPerioperative fluid overload is an important modifiable risk factor for adverse outcomes after colorectal surgery. This study aimed to define critical thresholds for perioperative fluid management and postoperative weight gain for patients undergoing elective laparoscopic colorectal surgery.MethodsThis was an analysis of consecutive elective laparoscopic colorectal resections at Lausanne University Hospital from May 2011 to May 2017. Main outcomes were overall, major (Clavien–Dindo grade IIIb or above) and respiratory complications, and postoperative ileus. Thresholds regarding perioperative fluid management and postoperative weight gain were identified through receiver operating characteristic (ROC) analysis and clinical judgement. Independent risk factors for all four outcomes were assessed by multinominal logistic regression.ResultsOverall and major complications occurred in 210 (36·2 per cent) and 46 (7·9 per cent) of 580 patients respectively. Twenty‐three patients (4·0 per cent) had respiratory complications and 98 (16·9 per cent) had postoperative ileus. Median length of hospital stay was 5 (i.q.r. 3–9) days. Based on respiratory complications, thresholds for perioperative intravenous fluid administration (postoperative day (POD) 0) were set pragmatically at 3000 ml for colonic (calculated threshold 3120 ml (area under ROC curve (AUROC) 0·63)) and 4000 ml for rectal (AUROC 0·79) procedures. Postoperative weight gain of 2·5 kg at POD 2 was predictive of respiratory complications. Multivariable analysis retained perioperative intravenous fluid administration over the above thresholds as an independent risk factor for overall (odds ratio (OR) 2·25, 95 per cent c.i. 1·23 to 4·11), major (OR 2·49, 1·17 to 5·31) and respiratory (OR 4·71, 1·42 to 15·58) complications. Weight gain above 2·5 kg at POD 2 was identified as a risk factor for respiratory complications (OR 3·58, 1·10 to 11·70) and ileus (OR 1·82, 1·02 to 3·52).ConclusionPerioperative intravenous fluid and weight thresholds were associated with postoperative adverse outcomes. These thresholds need independent validation.

Risk factors for respiratory complications in patients in the perioperative period

Diseases of the respiratory system (both acute and exacerbations of chronic ones) remain the most frequent non-surgical complications after surgical interventions of various sizes, increasing the duration of the patient»s hospital stay, increasing economic costs and the percentage of deaths. It was shown that respiratory complications developed after abdominal operations increased the risk of 30-day mortality by 10 times. The most common complications include: reintubation, acute respiratory failure, pulmonary edema, atelectasis and pneumonia. The development of respiratory complications is due to the pathology of the respiratory system and respiratory muscles. It is proved that the use of drugs that inhibit neuromuscular conduction in 75 % of cases provokes the development of atelectasis, respiratory muscle dysfunction and reduces respiratory volumes. Respiratory complications are most often caused by hypoxia or hypercapnia. Hypoxia is characterized by a decrease in the partial pressure of oxygen and is well corrected by additional oxygenation. In the first hours after surgery hypoxemia occurs in 50—55 % of cases with a decrease in saturation up to 80 %. Complete normalization of respiratory dysfunction usually occurs 4—6 hours after extubation. Hypercapnia, on the contrary, is characterized by an increase in the partial pressure of oxygen, the phenomena of hyperkalemia and respiratory acidosis. Correction of electrolyte and buffer disturbances is necessary. It is important for the Clinician to remember the need to identify possible risk factors for respiratory complications (modifiable and unmodified) and ways to correct them. Examination of the patient by a therapist before the planned operation, including possible preoperative preparation in the therapeutic departments of a multidisciplinary hospital helps to reduce the frequency of postoperative complications. In this article the authors describe recommendations for evaluation, prevention and diagnosis of respiratory complications in the perioperative period in patients with comorbid pathology.

A risk score for predicting respiratory complications after thoracic surgery.

Respiratory complications are some of the most common complications following thoracic surgery and can lead to higher perioperative morbidity and mortality. The purpose of this study was to develop a simple clinical score for prediction of respiratory complications after thoracic surgery, and determine the internal validity. In this retrospective cohort study, all consecutive patients were aged 18 years and over and undergoing non-cardiac thoracic surgery at a tertiary-care university hospital. Respiratory complications included bronchospasm, atelectasis, pneumonia, respiratory failure, and adult respiratory distress syndrome within 30 days of surgery or before discharge. A total of 1488 patients were included over a 7-year period, and 15.8% (235 of 1488 patients) developed respiratory complications. The significant predictors of respiratory complications were chronic obstructive pulmonary disease, American Society of Anesthesiologist physical status ≥ 3, right-sided surgery, duration of surgery longer than 180 min, preoperative arterial oxygen saturation on room air < 96%, and open thoracotomy. The area under receiving operating characteristic curve was 0.78 (95% confidence interval: 0.75-0.82) and 0.76 (95% confidence interval: 0.70-0.83) for the derivation and validation cohorts, respectively. The model was well calibrated with a Hosmer-Lemeshow goodness-of-fit of 7.32 ( p = 0.293). This study developed and internally validated a simple clinical risk score for prediction of respiratory complications following thoracic surgery. This score can be used to stratify high-risk patients, address modifiable risk factors for respiratory complications, and provide preventive strategies for improving postoperative outcomes.

Analysis of risk factors of respiratory complications in patients with cervical spinal cord injury and their implications for improving nursing intervention

Objective To investigate the main risk factors of respiratory complications in patients with cervical spinal cord injury so as to provide reference for early nursing assessment and personalized nursing intervention model. Methods A retrospective case series study was conducted on the clinical data of 303 patients with cervical spinal cord injury admitted to the Third Hospital of Hebei Medical University between January 2015 and September 2016. There were 248 males and 55 females, aged (44.9±13.8)years (range, 14-70 years). There were 109 cases at fracture site C1-4 and 194 cases at C5-8. According to ASIA classification, 131 cases were grade A, 26 cases grade B, 42 cases grade C, and 104 cases grade D. The duration from injury to operation was (23.2±69.9)hours (range, 6-48 hours). Univariate analysis was performed on the risk factors of respiratory complications, including gender, age (14-54, 55-65, and 66-70 years old), occupation, hospital stay, smoking history, previous history, ASIA grade (grades A to D), injury cause, complications (abdominal distension, hyponatremia, hypoproteinemia, and anemia). Multivariate logistic regression was used to analyze the significant risk factors in the univariate analysis so as to further identify risk factors associated with respiratory complications. Results Univariate analysis showed that age (55-65 and 66-70 years), ASIA grade A, ASIA grade B, smoking history, injury cause, complications (abdominal distension, hyponatremia, hypoproteinemia, and anaemia) were related to respiratory complication of patients with cervical spinal cord injury (P 0.05). Logistic regression analysis showed that age between 55 and 65 years (OR=3.989, P<0.05), age between 66 and 70 years(OR=0.301, P<0.05), AISA grade A (OR=30.300, P<0.05), ASIA grade B (OR=5.784, P<0.05), smoking history (OR=5.238, P<0.05), abdominal distension (OR=1.975, P<0.05), hypoproteinemia (OR=6.212, P<0.05), and hyponatremia (OR=3.233, P<0.05) were independent risk factors for respiratory complications in patients with spinal cord injury. Except for ASIA classification, other factors might be easily ignored by doctors and nurses, leading to poor prognosis of patients. Conclusions Age (above 55 years), ASIA grades A and B, smoking history, abdominal distention, hypoproteinemia, and hyponatremia are the risk factors of respiratory complications in patients with cervical spinal cord injury. Based on the results, early nursing assessment can be carried out and personalized nursing measures can be taken to reduce the incidence of respiratory complications. It can also provide reference for constructing standardized nursing intervention model. Key words: Cervical vertebrae; Spinal cord injuries; Respiratory system; Risk factors; Nursing care

Risk factors for respiratory complications after adenotonsillectomy in OSA children

Risk factors for respiratory complications after adenotonsillectomy in OSA children

Preoperative Glycosylated Hemoglobin: A Risk Factor for Patients Undergoing Coronary Artery Bypass

The prevalence of diabetes in the population of patients presenting with coronary artery disease continues to rise. The aim of this study was to assess whether high Glycosylated hemoglobin (HbA1c) was associated with adverse outcomes in patients undergoing elective coronary artery bypass grafting. A retrospective observational study on prospectively collected data in 4,678 patients undergoing elective, isolated coronary artery bypass graft procedures in a single institution over a 4-year period was conducted. Patients were grouped into those with adequate preoperative control of hyperglycemia (HbA1c <6.5%) and those with suboptimal control (HbA1c ≥6.5%). Multivariable analysis using HbA1c as a binary independent variable was undertaken in the whole group. A subgroup analysis in diabetic patients and in nondiabetic patients was performed. The effect of HbA1c on outcomes at higher levels (HbA1c ≥8.0% and HbA1c ≥9.0%) was also assessed. A total of 4,678 patients (mean age, 58.8; male, 4,254) were included in the study. HbA1c was less than 6.5% in 2,476 (52.93%) patients and 6.5% or higher in 2,202 (47.07%) patients. On multivariate analysis, there was no difference in mortality rates between the groups (odds ratio, 1.36; 95% confidence interval [CI], 0.95 to 1.953; p=0.08). Overall, an HbA1c of 6.5% or higher was an independent risk factor for respiratory complications (odds ratio, 1.05; 95% CI, 1.008 to 4.631; p= 0.01) and sternal dehiscence (odds ratio, 2.161; 95% CI, 1.008 to 4.63; p=0.04). An association between HbA1c levels and adverse outcomes was not seen in nondiabetic patients. No additional adverse postoperative complications were seen with increasing HbA1c levels (HbA1c ≥8.0% and HbA1c ≥9.0%). An HbA1c level of 6.5% or higher in patients presenting for coronary artery bypass grafting was associated with a significant increase in the incidence of deep sternal wound infection and respiratory complications.