Preoperative C-reactive protein/albumin ratio and mortality of off-pump coronary artery bypass graft.

Background: We sought to investigate the prognostic value of preoperative C-reactive protein (CRP)-to-albumin ratio (CAR) for the prediction of mortality in patients undergoing off-pump coronary artery bypass grafting (OPCAB). Methods: From January 2010 to August 2016, adult patients undergoing OPCAB were analyzed retrospectively. In a total of 2,082 patients, preoperative inflammatory markers including CAR, CRP, neutrophil-to-lymphocyte ratio, and platelet-to-lymphocyte ratio were recorded. Receiver operating characteristic (ROC) curves were used to determine the optimal threshold and compare the predictive values of the markers. The patients were divided into two groups according to the cut-off value of CAR, and then the outcomes were compared. The primary end point was 1-year mortality. Results: During the 1-year follow-up period, 25 patients (1.2%) died after OPCAB. The area under the curve of CAR for 1-year mortality was 0.767, which was significantly higher than other inflammatory markers. According to the calculated cut-off value of 1.326, the patients were divided into two groups: 1,580 (75.9%) patients were placed in the low CAR group vs. 502 (24.1%) patients in the high CAR group. After adjustment with inverse probability weighting, high CAR was significantly associated with increased risk of 1-year mortality after OPCAB (Hazard ratio, 5.01; 95% Confidence interval, 2.01-12.50; p < 0.001). Conclusions: In this study, we demonstrated that preoperative CAR was associated with 1-year mortality following OPCAB. Compared to previous inflammatory markers, CAR may offer superior predictive power for mortality in patients undergoing OPCAB. For validation of our findings, further prospective studies are needed.

Initial experience with the enhanced recovery after surgery (ERAS) protocols in gynecologic surgery at an urban academic tertiary medical center.

Background: The enhanced recovery after surgery (ERAS) protocols have been consistently associated with improved patient experience and surgical outcomes. Despite the release of ERAS Society guidelines specific to gynecologic oncology, the adoption of ERAS in gynecology on global level has been disappointingly low and some centers have shown minimal improvement in clinical outcomes after adopting ERAS. The aim of this study is to describe the development and early experience of ERAS protocols in gynecologic surgery at an urban academic tertiary medical center. Methods: This was an observational prospective cohort study. The target patient population included those with low comorbidities who were scheduled to undergo various types of gynecologic surgeries for both benign and malignant diseases between October 2020 and February 2021. Two attending surgeons implemented the protocols for their patients (ERAS cohort) while three attending surgeons maintained the conventional perioperative care for their patients (non-ERAS cohort). Baseline characteristics, surgical outcomes and patients' answers to a 12-question survey were compared. A case-matched comparative analysis was also performed between the ERAS cohort and the historical non-ERAS cohort (those who received the same types of surgical procedures from the two ERAS attending surgeons prior to the implementation of the protocols). Results: A total of 244 patients were evaluated (122 in the ERAS cohort vs. 122 in the non-ERAS cohort). The number of vials of opioid analgesia used during the first two postoperative days was significantly lower whereas the use of nonsteroidal anti-inflammatory drugs (NSAIDs) and acetaminophen was more frequent in the ERAS cohort group. The patients in the ERAS group reported less postoperative pain, feelings of hunger and thirst, and greater amount of exercise postoperatively. These benefits of the ERAS cohort were more pronounced in the patients who underwent laparotomic surgeries than those who underwent laparoscopic surgeries. The case-matched comparative analysis also showed similar results. The length of hospital stay did not differ between those who underwent the ERAS protocols and those who did not. Conclusions: The results of the study demonstrated the safety, clinical feasibility and benefits of the ERAS protocols for patients undergoing gynecologic surgeries for both benign and malignant indications.

Effect of chewing gum on anxiety in women undergoing elective cesarean section: a randomized controlled study.

BACKGROUND: Preoperative anxiety is a common problem in pregnant women undergoing elective cesarean section. We aimed to determine the anxiolytic effects of chewing gum in pregnant women undergoing elective cesarean section under regional anesthesia. METHODS: This was a single-center, prospective, randomized controlled trial. Sixty-six women were randomly assigned to either the control group (n=33) or gum group (n=33) in a 1:1 ratio. In the gum group, the participants chewed xylitol gum for at least 10 min/h, regardless of fasting. Gum chewing was started at 5 pm a day before surgery and continued till the participant entered the operation room. In the control group, participants were requested to follow fasting guidelines without further instruction. The primary outcome was preoperative anxiety measured using the Amsterdam Preoperative Anxiety and Information Scale (APAIS) immediately before surgery. RESULTS: The APAIS score immediately before surgery showed no significant difference between the control and the gum group (19.2±5.8 vs. 19.1±4.1, P>0.99). There were no statistically significant differences in the eight items related to anxiety: unfitness, concentration difficulty, hunger, thirst, dry mouth, fatigue, headache, and nausea. However, the pain score during the procedure of combined spinal epidural anesthesia was significantly lower in the chewing gum group [4 (IQR, 3-5.5)] than in the control group [5 (IQR, 3-7), P=0.045]. CONCLUSIONS: Preoperative gum chewing did not reduce anxiety levels measured immediately before entering the operating room in the participants undergoing elective cesarean section. TRIAL REGISTRATION: Clinical Trial Registry of Korea: https://cris.nih.go.kr/cris/index.jsp and identifier: KCT0006602; date of registration: September 27, 2021; principal investigator's name: RyungA Kang.

The effect of adding chewing gum to oral carbohydrates on preoperative anxiety scores in women undergoing gynecological surgery: A randomized controlled study.

BACKGROUND: Preoperative anxiety is an unpleasant experience that can adversely affect perioperative outcomes. Although clinical benefits of preoperative oral carbohydrate is well reported, the effect of adding chewing gum to carbohydrate loading has never been studied. We aimed to investigate the effect of adding gum-chewing to oral carbohydrates on preoperative anxiety and gastric volume in patients undergoing gynecologic surgery. METHODS: One hundred and four patients were enrolled and randomized either into a carbohydrate drink group (CHD group) or CHD with gum group. The CHD group was instructed to drink 400 mL of oral carbohydrate the evening before and 200-400 mL 3 hours before surgery. The CHD with gum group was encouraged to chew gum freely during preanesthetic fasting in addition to consuming oral carbohydrates in the same manner. The primary endpoint was preoperative anxiety assessed using the Amsterdam preoperative anxiety and information scale (APAIS). The degree of patient-reported quality of recovery after surgery and gastric volume prior to general anesthesia were also compared as secondary outcomes. RESULTS: Preoperative APAIS was lower in the CHD with gum group compared with the CHD group (16 [11.5, 20] vs. 20 [16.5, 23], p = 0.008). Patient-rated quality of recovery after surgery was also higher in the CHD with gum group and showed a significant negative correlation with preoperative APAIS score (correlation coefficient: -0.950, p = 0.001). Gastric volume were not different between the groups (0 [0-0.45] vs. 0 [0-0.22], p = 0.158). CONCLUSION: The addition of gum chewing to oral carbohydrate loading during preoperative fasting was more effective in relieving preoperative anxiety than oral carbohydrate alone in women patients undergoing elective gynecologic surgery. TRIAL REGISTRATION: Clinical Research Information Services, CRIS identifier: KCT0005714, https://cris.nih.go.kr/cris/index.jsp.

The Effect of Intrathecal Morphine on Postoperative Opioid Consumption in Patients Undergoing Abdominal Surgery for Gynecologic Malignancy: A Randomized Sham-Controlled Trial.

BACKGROUND: Surgery for gynecologic malignancy via midline-laparotomy leads to severe postoperative pain. Adequate pain control while sparing opioid consumption does offer benefits in postoperative complications and recovery. Intrathecal morphine (ITM) provides simple and effective analgesia. In this randomized trial, we compared postoperative opioid consumption in patients who received either ITM or a sham procedure. METHODS: We enrolled 68 adult patients undergoing open gynecologic oncology surgery from June 2021 to November 2021. They were randomly allocated to the ITM group (ITM; 200 µg injection) or sham group (sham procedure) to achieve a final 1:1 ratio between groups. We compared opioid consumption and pain severity during 72 hours after surgery. The variables regarding postoperative recovery and patient-centered outcomes were collected. The primary outcome is cumulative intravenous (IV) opioid consumption 24 hours after surgery. RESULTS: The median (interquartile range) cumulative IV opioid consumption during 24 hours after surgery was 18 mg (12-29) in the ITM group and 36 mg (27-42) in the sham group (median difference, 13; 95% confidence interval, 7.2-20.7; P < .001). Patient satisfaction regarding pain control was statistically significantly higher in the ITM group than in the sham group at postoperative 24 and 48 hours ( P < .001 and P = .005, respectively). There were no significant differences in the variables associated with postoperative recovery and frequency of complications requiring treatment. CONCLUSIONS: ITM is a safe and effective analgesic method after curative intent laparotomy for gynecologic malignancy. ITM provides better pain relief, reduces opioid consumption, and improves patient satisfaction without additional evident adverse events.

Anxiolytic effects of chewing gum during preoperative fasting and patient-centered outcome in female patients undergoing elective gynecologic surgery: randomized controlled study.

Although previous studies reported that chewing gum during the preoperative fasting has the benefits of alleviating anxiety and dry mouth, preoperative chewing gum has yet to be accepted as a standard practice due to conventional anesthetic custom. Our study aimed to prospectively evaluate the effects of gum chewing on preoperative anxiety and patient's discomfort in female patients undergoing gynecologic surgery. Ninety-four patients were enrolled and randomized either into conventional fasting group (control group) or chewing gum with fasting group (gum group). The control group was instructed to fast from 3 p.m. on the day before surgery. The gum group performed preoperative fasting in the same manner, but was encouraged to chew gum freely during the fasting period. The primary endpoint was the degree of preoperative anxiety. For the evaluation of preoperative anxiety, Amsterdam preoperative anxiety and information scale (APAIS) was used. Preoperative gastric fluid volume and acidity were also measured as the secondary outcomes. Preoperative anxiety using APAIS was significantly lower in the gum group compared to the control group (control group vs. gum group: 20.9 vs. 17.8, p = 0.009). However, there was no significant difference in the gastric fluid analysis between the groups. In the female patients for elective gynecologic surgery, chewing gum during the preoperative fasting period helped to alleviate preoperative anxiety without additional increase of pulmonary aspiration risks.Trial registration: KCT0004422 (05/11/2019, https://cris.nih.go.kr ; registration number).

The angle range of leg abduction with external hip rotation which can minimize femoral artery and vein overlap in pediatric patients.

BACKGROUND: Since the femoral artery frequently overlaps the femoral vein, femoral central venous catheterization carries the risk of arterial puncture in pediatric patients. AIMS: We evaluated the angle range of leg abduction with external hip rotation to minimize the overlap between the femoral artery and vein in pediatric patients undergoing general anesthesia. METHODS: Eighty-two pediatric patients who underwent elective surgery with general anesthesia were enrolled in this study. Using ultrasonography, patients were divided into groups N (patients with non-overlap) and O (patients with continuing overlap) based on the presence of non-overlap range between the femoral artery and vein. The range minimizing the overlap was defined as the range without overlap in group N and as the range presenting the overlap that was less-than-half of the radius of the femoral vein in group O. By increasing the angle of leg abduction with external hip rotation, the starting and ending angles minimizing the overlap were found using ultrasonographic images. RESULTS: The angle range of leg abduction with external hip rotation minimizing the overlap between the femoral artery and vein was defined as the range from the maximum 99% confidence interval of starting angles to the minimum 99% confidence interval of ending angles, which was between 45° and 65° in group N and between 48° and 58° in group O, respectively. CONCLUSION: Positioning patients in a range of 48° and 58° leg abduction with external hip rotation can minimize the overlap between the femoral artery and vein. However, the clinical usefulness of this positioning for femoral venous catheterization remains to be seen.

The Mid-term Results of Thoracoscopic Closure of Atrial Septal Defects.

BACKGROUND AND OBJECTIVES: Recently, minimally invasive surgical (MIS) techniques including robot-assisted operations have been widely applied in cardiac surgery. The thoracoscopic technique is a favorable MIS option for patients with atrial septal defects (ASDs). Accordingly, we report the mid-term results of thoracoscopic ASD closure without robotic assistance. SUBJECTS AND METHODS: We included 66 patients who underwent thoracoscopic ASD closure between June 2006 and July 2014. Mean age was 27±9 years. The mean size of the ASD was 25.9±6.3 mm. Eleven patients (16.7%) had greater than mild tricuspid regurgitation (TR). The TR pressure gradient was 32.4±8.6 mmHg. RESULTS: Fifty-two (78.8%) patients underwent closure with a pericardial patch and 14 (21.2%) underwent direct suture closure. Concomitant procedures included tricuspid valve repair in 8 patients (12.1%), mitral valve repair in 4 patients (6.1%), and right isthmus block in 1 patient (1.5%). The mean length of the right thoracotomy incision was 4.5±0.9 cm. The mean cardiopulmonary bypass time was 159±43 minutes, and the mean aortic cross clamp time was 79±29 minutes. The mean hospital stay lasted 6.1±2.6 days. There were no early deaths. There were 2 reoperations. One was due to ASD patch detachment and the other was due to residual mitral regurgitation after concomitant mitral valve repair. However, there have been no reoperations since July 2010. There were 2 pneumothoraxes requiring chest tube re-insertion. There was one wound dehiscence in an endoscopic port. The mean follow-up duration was 33±31 months. There were no deaths, residual shunts, or reoperations during follow-up. CONCLUSION: Thoracoscopic ASD closure without robotic assistance is feasible, suggesting that this method is a reliable MIS option for patients with ASDs.

Risk Factors for Acute Kidney Injury after Congenital Cardiac Surgery in Infants and Children: A Retrospective Observational Study.

Acute kidney injury (AKI) after pediatric cardiac surgery is associated with high morbidity and mortality. Modifiable risk factors for postoperative AKI including perioperative anesthesia-related parameters were assessed. The authors conducted a single-center, retrospective cohort study of 220 patients (aged 10 days to 19 years) who underwent congenital cardiac surgery between January and December 2012. The incidence of AKI within 7 days postoperatively was determined using the Kidney Disease: Improving Global Outcomes (KDIGO) criteria. Ninety-two patients (41.8%) developed AKI and 18 (8.2%) required renal replacement therapy within the first postoperative week. Among patients who developed AKI, 57 patients (25.9%) were KDIGO stage 1, 27 patients (12.3%) were KDIGO stage 2, and eight patients (3.6%) were KDIGO stage 3. RACHS-1 (Risk-Adjusted classification for Congenital Heart Surgery) category, perioperative transfusion and fluid administration as well as fluid overload were compared between patients with and without AKI. Multivariable logistic regression analyses determined the risk factors for AKI. AKI was associated with longer hospital stay or ICU stay, and frequent sternal wound infections. Younger age (<12 months) [odds ratio (OR), 4.01; 95% confidence interval (CI), 1.77-9.06], longer cardiopulmonary bypass (CPB) time (OR, 2.45; 95% CI, 1.24-4.84), and low preoperative hemoglobin (OR, 2.40; 95% CI, 1.07-5.40) were independent risk factors for AKI. Fluid overload was not a significant predictor for AKI. When a variable of hemoglobin concentration increase (>3 g/dl) from preoperative level on POD1 was entered into the multivariable analysis, it was independently associated with postoperative AKI (OR, 6.51; 95% CI, 2.23-19.03 compared with no increase). This association was significant after adjustment with patient demographics, medication history and RACHS-1 category (hemoglobin increase >3g/dl vs. no increase: adjusted OR, 6.94; 95% CI, 2.33-20.69), regardless of different age groups and cyanotic or non-cyanotic heart disease. Prospective trials are required to evaluate whether correction of preoperative anemia and prevention of hemoconcentration may ameliorate postoperative AKI in patients who underwent congenital cardiac surgery.

Predictive Value of Intraoperative Thromboelastometry for the Risk of Perioperative Excessive Blood Loss in Infants and Children Undergoing Congenital Cardiac Surgery: A Retrospective Analysis.

OBJECTIVE: Laboratory hemostatic variables and parameters of rotational thromboelastometry (ROTEM) were evaluated for their ability to predict perioperative excessive blood loss (PEBL) after congenital cardiac surgery. DESIGN: Retrospective and observational. SETTING: Single, large university hospital. PARTICIPANTS: The study comprised 119 children younger than 10 years old undergoing congenital cardiac surgery with cardiopulmonary bypass (CPB). MEASUREMENTS AND MAIN RESULTS: Intraoperative excessive blood loss was defined as estimated blood loss≥50% of estimated blood volume (EBV). Postoperative excessive blood loss was defined as measured postoperative chest tube and Jackson-Pratt drainage≥30% of EBV over 12 hours or≥50% of EBV over 24 hours in the intensive care unit. PEBL was defined as either intraoperative or postoperative excessive blood loss. External temogram (EXTEM) and fibrinogen temogram (FIBTEM) were analyzed before and after CPB with ROTEM and laboratory hemostatic variables. Multivariate logistic regression was performed. Incidence of PEBL was 19.3% (n = 23). Independent risk factors for PEBL were CPB time>120 minutes, post-CPB FIBTEM alpha-angle, clot firmness after 10 minutes<5 mm, post-CPB EXTEM alpha-angle, clot firmness after 10 minutes<30 mm, and post-CPB EXTEM maximal lysis>20%. Laboratory hemostatic variables were not significant in multivariate analysis. The risk prediction model was developed from the results of multivariate analysis. The area under the receiver operating characteristic curve was 0.94 (95% confidence interval: 0.90-0.99). CONCLUSIONS: Post-CPB ROTEM may be useful for predicting both intraoperative and postoperative excessive blood loss in congenital cardiac surgery. This study provided an accurate prediction model for PEBL and supported intraoperative transfusion guidance using post-CPB FIBTEM-A10 and EXTEM-A10.

Anesthetic experience of patient with isolated left ventricular noncompaction: a case report.

Isolated left ventricular noncompaction (LVNC) is a rare primary genetic cardiomyopathy characterized by prominent trabeculation of the left ventricular wall and intertrabecular recesses. Perioperative management of the patient with LVNC might be challenging due to the clinical symptoms of heart failure, systemic thromboembolic events, and fatal left ventricular arrhythmias. We conducted real time intraoperative transesophageal echocardiography in a patient with LVNC undergoing general anesthesia for ovarian cystectomy.

Stanford type A aortic dissection in a patient with Marfan syndrome during pregnancy: a case report.

Aortic dissection during pregnancy is a devastating event for both the pregnant woman and the baby. We report a case of acute aortic dissection (Stanford type A) in a pregnant woman with Marfan syndrome at the 29(th) week of gestation. She underwent a cesarean section followed by an ascending aorta and total arch replacement with cardiopulmonary bypass, without a prior sternotomy. The hemodynamic parameters were kept stable during the cesarean section by using inotropes and vasopressors under transesophageal echocardiography monitoring. The newborn survived after endotracheal intubation and management in a neonatal intensive care unit.

Efficacy of 18F-fluorodeoxyglucose positron emission tomography/CT imaging for extracapsular spread of laryngeal squamous cell carcinoma.

BACKGROUND: We evaluated the use of fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT for the identification of extracapsular spread (ECS) with supporting histologic correlations in laryngeal cancer. METHODS: We reviewed the medical records of 89 patients with laryngeal cancer who underwent FDG PET/CT before surgery. RESULTS: ECS was present in 38.2% (18 of 47) of dissected necks and in 32.2% (20 of 62) of dissected cervical levels. There was a significant difference in the standardized uptake value maximum (SUVmax ) between cervical lymph nodes with and without ECS (6.39 ± 4.53 vs 1.21 ± 1.70; p < .001); the cutoff value for differentiating nodes with ECS from those without ECS was 2.8, with a sensitivity of 85.7% and specificity of 85.6%. CONCLUSION: A median SUVmax cutoff value >2.8 was associated with an increased risk of cervical lymph node metastasis and ECS in patients with laryngeal cancer.

Clinical Risk Scoring Models for Prediction of Acute Kidney Injury after Living Donor Liver Transplantation: A Retrospective Observational Study.

Acute kidney injury (AKI) is a frequent complication of liver transplantation and is associated with increased mortality. We identified the incidence and modifiable risk factors for AKI after living-donor liver transplantation (LDLT) and constructed risk scoring models for AKI prediction. We retrospectively reviewed 538 cases of LDLT. Multivariate logistic regression analysis was used to evaluate risk factors for the prediction of AKI as defined by the RIFLE criteria (RIFLE = risk, injury, failure, loss, end stage). Three risk scoring models were developed in the retrospective cohort by including all variables that were significant in univariate analysis, or variables that were significant in multivariate analysis by backward or forward stepwise variable selection. The risk models were validated by way of cross-validation. The incidence of AKI was 27.3% (147/538) and 6.3% (34/538) required postoperative renal replacement therapy. Independent risk factors for AKI by multivariate analysis of forward stepwise variable selection included: body-mass index >27.5 kg/m2 [odds ratio (OR) 2.46, 95% confidence interval (CI) 1.32-4.55], serum albumin <3.5 mg/dl (OR 1.76, 95%CI 1.05-2.94), MELD (model for end-stage liver disease) score >20 (OR 2.01, 95%CI 1.17-3.44), operation time >600 min (OR 1.81, 95%CI 1.07-3.06), warm ischemic time >40 min (OR 2.61, 95%CI 1.55-4.38), postreperfusion syndrome (OR 2.96, 95%CI 1.55-4.38), mean blood glucose during the day of surgery >150 mg/dl (OR 1.66, 95%CI 1.01-2.70), cryoprecipitate > 6 units (OR 4.96, 95%CI 2.84-8.64), blood loss/body weight >60 ml/kg (OR 4.05, 95%CI 2.28-7.21), and calcineurin inhibitor use without combined mycophenolate mofetil (OR 1.87, 95%CI 1.14-3.06). Our risk models performed better than did a previously reported score by Utsumi et al. in our study cohort. Doses of calcineurin inhibitor should be reduced by combined use of mycophenolate mofetil to decrease postoperative AKI. Prospective randomized trials are required to address whether artificial modification of hypoalbuminemia, hyperglycemia and postreperfusion syndrome would decrease postoperative AKI in LDLT.

Obesity is independently associated with spinal anesthesia outcomes: a prospective observational study.

The influence of body-mass index (BMI) on spinal anesthesia is still controversial, with discrepant results reported in previous studies. To compare spinal anesthesia in obese and non-obese subjects, the anesthesia profiles in patients who underwent spinal anesthesia using intrathecal hyperbaric bupivacaine were compared. A total of 209 patients undergoing elective total knee replacement arthroplasty (TKRA) surgery under spinal anesthesia were divided into an NO (non-obese) group (BMI < 30 kg/m2, n = 141) and an O (obese) group (BMI ≥ 30 kg/m2, n = 68). Anesthesia was deemed successful if a bilateral T12 sensory block occurred within 15 minutes of intrathecal drug administration, and if the level of sensory block was higher than T12 when the surgery ended. Logistic regression analysis with multiple variables known to influence spinal anesthesia was performed to identify which parameters independently determined the spinal anesthesia outcome. Similar doses of bupivacaine were administered to the NO and O groups. The incidence of anesthesia failure was significantly lower in the O group [n = 43 (30.5%) in the NO group vs. n = 10 (18.9%) in the O group, p = 0.014]. The independent predictors for successful anesthesia in all patients were dose of hyperbaric bupivacaine [odds ratio (OR) 2.12, 95% CI: 1.64-2.73] and obese status (BMI ≥ 30 kg/m2, OR 2.86, 95% CI: 1.25-6.52). Time to first report of postoperative pain and time to first self-void were significantly longer in the O group. These results suggest that the duration of block with hyperbaric bupivacaine is prolonged in obese patients and obesity is independently associated with spinal anesthesia outcomes, as is bupivacaine dosage. A further study enrolling patients with morbid obesity and using a fixed bupivacaine dosage is required to confirm the effect of obesity on spinal anesthesia.

Potentially modifiable risk factors for acute kidney injury after surgery on the thoracic aorta: a propensity score matched case-control study.

Perioperative risk factors were identified for acute kidney injury (AKI) defined by the RIFLE criteria (RIFLE = risk, injury, failure, loss, end stage) after surgery on the thoracic aorta with cardiopulmonary bypass (CPB) in this case-control study. A retrospective review was completed for 702 patients who underwent surgery on the thoracic aorta with CPB. A total of 183 patients with AKI were matched 1:1 with patients without AKI by a propensity score. Matched variables included age, gender, body-mass index, preoperative creatinine levels, estimated glomerular filtration rate, a history of hypertension, diabetes mellitus, cerebrovascular accident, smoking history, or chronic obstructive pulmonary disease to exclude the influence of patient demographics, preoperative medical status, and baseline renal function. Multivariate logistic regression analysis was used to evaluate for independent risk factors in the matched sample of 366 patients. The incidence of AKI was 28.6% and 5.9% of patients from the entire sample required renal replacement therapy. AKI was associated with a prolonged postoperative hospital stay and a higher one-month and one-year mortality both in the entire and matched sample set. Independent risk factors for AKI were a left ventricular ejection fraction <55%, preoperative hemoglobin level <10 g/dL, albumin <4.0 g/dL, diagnosis of dissection, operation time >7 hours, deep hypothermic circulatory arrest (DHCA) time >30 min, pRBC transfusion >1000 mL, and FFP transfusion >500 mL. Although the incidence of poor glucose control (blood glucose >180 mg/dL) was higher in patients with AKI in matched sample, it was not an independent risk factor.AKI was still associated with a poor clinical outcome in the matched sample. Potentially modifiable risk factors included preoperative anemia and hypoalbuminemia. Efforts to minimize operation time and DHCA time along with transfusion amount may protect patients undergoing aortic surgery against AKI.

A comparison among infusion of lidocaine and dexmedetomidine alone and in combination in subjects undergoing coronary artery bypass graft: a randomized trial.

BACKGROUND: Previous studies have reported the cardioprotective effect of dexmedetomidine and lidocaine. We compared the effect of lidocaine and dexmedetomidine infusion during off-pump coronary artery bypass graft (OPCAB). METHODS: 153 patients undergoing OPCAB were enrolled. The lidocaine group (n=36, Group LIDO) received an infusion of lidocaine 2 mg/kg/h after bolus 1.5 mg/kg; the dexmedetomidine group (n=40, Group DEX) received dexmedetomidine 0.3-0.7 µg/kg/h; the combined group (n=39, Group Combined) received infusion of both drugs; and the control group (n=38) received nothing. We measured serum creatinine kinase-myocardial band (CK-MB) and cardiac troponin I (cTnI) concentration before and immediately after the surgery, postoperative day (POD)#1 and #2. The complication rate and clinical outcomes were compared. RESULTS: The concentration of cTnI was significantly lower in the Group LIDO and Group Combined than the control group on POD#2. The concentration of CK-MB was significantly lower in the Group LIDO and Group Combined compared to the control group on POD#1 and #2 [CK-MB on POD#1: 7.67 (5.78-11.92) vs. 7.18 (5.01-11.72) vs. 13.19 (6.85-23.87) in the Group LIDO, combined and control, respectively, Group LIDO vs. control: p=0.003, Group Combined vs. control: p=0.015]. The AUC of CK-MB was significantly lower in the Group LIDO and Group Combined than the control group. However, clinical variables including complication rate, ICU stay and one-year mortality were not different. CONCLUSIONS: Lidocaine infused at 2 mg/kg/h, but not dexmedetomidine infused at 0.3-0.7 µg/kg/h reduced postoperative myocardial injury marker levels compared with the control group. However, no other clinical benefits were observed.

The anesthetic experience of implantable left ventricular assist device insertion: a case report.

Because of insufficient number of donor hearts for cardiac transplantation, the use of implantable left ventricular assist device (LVAD) has been increasing as an alternative. During this procedure, the fundamental role of anesthesiologists would be to maintain stable hemodynamics. This report describes the anesthetic case of a 75-year-old man who underwent implantable LVAD placement as a destination therapy of his heart failure in Korea. The procedure and anesthesia were uneventful with transesophageal echocariographic guide. He moved to the ward on postoperative day 10 without fatal complication.

Fibrinogen recovery and changes in fibrin-based clot firmness after cryoprecipitate administration in patients undergoing aortic surgery involving deep hypothermic circulatory arrest.

BACKGROUND: Cryoprecipitate may be used to treat bleeding in cardiac surgery. Its effects on plasma fibrinogen and fibrin clotting in this setting are poorly defined. STUDY DESIGN AND METHODS: Patients undergoing on-pump aortic surgery with deep hypothermic circulatory arrest (DHCA) were recruited prospectively. After protamine reversal, cryoprecipitate was administered to patients with bleeding, and fibrin deficit was indicated by thromboelastometry (ROTEM)-based FIBTEM test. Coagulation was assessed using ROTEM-based tests and standard laboratory tests before and after cryoprecipitate. RESULTS: Thirteen patients were included. Cryoprecipitate significantly elevated EXTEM A10 from (mean ± standard deviation) 29.4 ± 5.8 to 34.8 ± 5.9 mm (p = 0.01), FIBTEM A10 from 3.5 ± 0.9 to 5.8 ± 1.7 mm (p = 0.04), and plasma fibrinogen concentration from 154.2 ± 25.6 to 193.4 ± 30.5 mg/dL (p = 0.01). EXTEM clot elasticity at 10 minutes (CE10) increased from 42.5 ± 12.0 to 54.7 ± 14.9 mm after cryoprecipitate (30.0% increase). FIBTEM CE10 increased from 3.7 ± 0.9 to 6.2 ± 2.0 mm (53.0% increase). A fibrinogen dose of 13.2 ± 5.2 mg/kg was required to increase FIBTEM A10 by 1 mm. In vivo recovery of fibrinogen was 61.6 ± 31.2%. CONCLUSIONS: Cryoprecipitate increased plasma fibrinogen levels and fibrin-based clotting in bleeding patients undergoing aortic surgery with DHCA. In vivo recovery of fibrinogen was considerably below 100% and fibrinogen content varied between cryoprecipitate units. Trials are needed to assess whether cryoprecipitate impacts clinical outcomes and to evaluate its safety.

Effects of two different doses of epidural steroid on blood glucose levels and pain control in patients with diabetes mellitus.

BACKGROUND: A high incidence of diabetes mellitus has been reported among patients diagnosed with lumbar degenerative spinal diseases. Although epidural steroid injections are known to increase the postprocedure blood glucose level, it has not been investigated whether a lower steroid dose can reduce blood glucose excursions and still be effective in controlling patients' subjective pain. OBJECTIVE: We compared the effects of 2 common doses of triamcinolone administered via epidural steroid injections on blood glucose levels and pain control in patients with diabetes mellitus to determine an adequate epidural steroid dose. STUDY DESIGN: A prospective observational study. METHODS: One hundred patients with diabetes mellitus were enrolled. They received lumbar transforaminal, lumbar interlaminar, or caudal epidural triamcinolone for radiculopathy, spinal stenosis, or failed back surgery syndrome. After the type of procedure was clinically determined, the doses of triamcinolone given were randomly chosen, either 40 mg (Group 40) or 20 mg (Group 20). The patients were asked to measure their finger stick blood glucose level twice daily (fasting and postprandial) for 3 days before the injection, on the day of the injection, for 7 days after the injection, and at 14 days after the injection. They also kept a blood glucose diary. Employment status and clinical outcome were evaluated at 8 weeks after the procedure. RESULTS: There were significant increases in fasting blood glucose (FBG) level on postprocedure day (PPD) #1 to PPD #3 in Group 40, but on PPD #1 in Group 20. Moreover, there was a significant difference in FBG between groups on PPD #1 and PPD #2 (FBG on PPD #1: 179 [51]) mg/dL in Group 40 versus 146 [50] mg/dL in Group 20, P < 0.001]. Postprandial blood glucose (PBG) level was significantly elevated in both groups from PPD #0 to PPD #3. Notably, the increase in PBG was significantly greater in Group 40 than Group 20 on PPD #0 and #1 (PBG on PPD #0: 288 [57] mg/dL versus 242 [94] mg/dL in Groups 40 and 20, respectively, P = 0.004). The numeric rating scale for pain reported by the patients decreased for 2 weeks after treatment with no difference between groups. Employment status and clinical outcome was not different between groups. LIMITATIONS: The patients who chose to participate in this study may be a cohort of well-controlled patients with diabetes mellitus. The type of procedure performed was determined by a clinical decision and not randomized. The different routes of administration and diagnosis of failed back surgery syndrome can result in different levels of systemic absorption, thereby influencing the degree and duration of hyperglycemia. In patients with FBSS, the epidural space may be destructed by surgery and adhesive changes in epidural space could be extensive. Therefore, we thought that the absorption of epidural space in these patients would be incomplete or slow compared with those without FBSS. CONCLUSION: Epidural steroid injections were associated with statistically significant elevations in PBG in patients with diabetes for up to 4 days after the procedure. The higher dose of triamcinolone increased FBG and PBG greater than a lower dose did without affecting pain control, employment status, or clinical outcome. Thus, with respect to glucose and pain control, 20 mg of triamcinolone appears to be recommended rather than 40 mg in patients with diabetes. Clinical Trials registration : NCT01435707.