Background: and Purpose Accurate classification of ischemic stroke subtype is important for effective secondary prevention of stroke. We used diffusion-weighted image (DWI) and atrial fibrillation (AF) data to train a deep learning algorithm to classify stroke subtype. Methods: Model development was done in 2,988 patients with ischemic stroke from three centers by using U-net for infarct segmentation and EfficientNetV2 for subtype classification. Experienced neurologists (n=5) determined subtypes for external test datasets, while establishing a consensus for clinical trial datasets. Automatically segmented infarcts were fed into the model (DWI-only algorithm). Subsequently, another model was trained, with AF included as a categorical variable (DWI+AF algorithm). These models were tested: (1) internally against the opinion of the labeling experts, (2) against fresh external DWI data, and (3) against clinical trial dataset. Results: In the training-and-validation datasets, the mean (±standard deviation) age was 68.0±12.5 (61.1% male). In internal testing, compared with the experts, the DWI-only and the DWI+AF algorithms respectively achieved moderate (65.3%) and near-strong (79.1%) agreement. In external testing, both algorithms again showed good agreements (59.3%–60.7% and 73.7%–74.0%, respectively). In the clinical trial dataset, compared with the expert consensus, percentage agreements and Cohen’s kappa were respectively 58.1% and 0.34 for the DWI-only vs. 72.9% and 0.57 for the DWI+AF algorithms. The corresponding values between experts were comparable (76.0% and 0.61) to the DWI+AF algorithm. Conclusion Our model trained on a large dataset of DWI (both with or without AF information) was able to classify ischemic stroke subtypes comparable to a consensus of stroke experts.

Purpose: Renal tumors account for approximately 7% of all childhood cancers. These include Wilms tumor (WT), clear cell sarcoma of the kidney (CCSK), malignant rhabdoid tumor of the kidney (MRTK), renal cell carcinoma (RCC), congenital mesoblastic nephroma (CMN) and other rare tumors. We investigated the epidemiology of pediatric renal tumors in Korea. Materials and Methods: From January 2001 to December 2015, data of pediatric patients (0–18 years) newly-diagnosed with renal tumors at 26 hospitals were retrospectively analyzed. Results: Among 439 patients (male, 240), the most common tumor was WT (n=342, 77.9%), followed by RCC (n=36, 8.2%), CCSK (n=24, 5.5%), MRTK (n=16, 3.6%), CMN (n=12, 2.7%), and others (n=9, 2.1%). Median age at diagnosis was 27.1 months (range 0-225.5) and median follow-up duration was 88.5 months (range 0-211.6). Overall, 32 patients died, of whom 17, 11, 1, and 3 died of relapse, progressive disease, second malignant neoplasm, and treatment-related mortality. Five-year overall survival and event free survival were 97.2% and 84.8% in WT, 90.6% and 82.1% in RCC, 81.1% and 63.6% in CCSK, 60.3% and 56.2% in MRTK, and 100% and 91.7% in CMN, respectively (p < 0.001). Conclusion The pediatric renal tumor types in Korea are similar to those previously reported in other countries. WT accounted for a large proportion and survival was excellent. Non-Wilms renal tumors included a variety of tumors and showed inferior outcome, especially MRTK. Further efforts are necessary to optimize the treatment and analyze the genetic characteristics of pediatric renal tumors in Korea.

This study aimed to present the prognosis after minor acute ischemic stroke (AIS) or transient ischemic attack (TIA), using a definition of subsequent stroke in accordance with recent clinical trials. In total, 9,506 patients with minor AIS (National Institutes of Health Stroke Scale ≤ 5) or high-risk TIA (acute lesions or ≥ 50% cerebral artery steno-occlusion) admitted between November 2010 and October 2013 were included. The primary outcome was the composite of stroke (progression of initial event or a subsequent event) and all-cause mortality. The cumulative incidence of stroke or death was 11.2% at 1 month, 13.3% at 3 months and 16.7% at 1 year. Incidence rate of stroke or death in the first month was 12.5 per 100 person-months: highest in patients with large artery atherosclerosis (17.0). The risk of subsequent events shortly after a minor AIS or high-risk TIA was substantial, particularly in patients with large artery atherosclerosis.

BACKGROUND: Dexmedetomidine, an α2-adrenergic agonist, can be used for sedation and as an adjuvant to anesthetics. This study aimed to evaluate the effects of preanesthetic administration of dexmedetomidine on the propofol and remifentanil requirement during general anesthesia and postoperative pain in patients undergoing laparoscopic cholecystectomy. METHODS: Sixty patients were randomly assigned to group D or S (n = 30 each). Dexmedetomidine (0.5 µg/kg) and a comparable volume of saline were administered in groups D and S, respectively, over a 10 minutes period before induction. General anesthesia was induced and maintained with propofol and remifentanil; the bispectral index was maintained at 40–60. The intraoperative remifentanil and propofol dosages were recorded, and postoperative pain was assessed using a visual analog scale (VAS). RESULTS: In groups S and D, propofol dosage was 8.52 ± 1.64 and 6.83 ± 1.55 mg/kg/h, respectively (P < 0.001), while remifentanil dosage was 7.18 ± 2.42 and 4.84 ± 1.44 µg/ kg/h, respectively (P < 0.001). VAS scores for postoperative pain were 6.50 (6–7) and 6.0 (6–7), respectively, at 30 minutes (P = 0.569), 5 (4–5) and 4 (3–5), respectively, at 12 hours (P = 0.039), and 2 (2–3) and 2 (1.25–2), respectively, at 24 hours (P = 0.044). The Friedman test revealed that VAS scores changed over time in both groups (P < 0.001). CONCLUSIONS: Preanesthetic single administration of a low dose of dexmedetomidine (0.5 µg/kg) can significantly decrease the remifentanil and propofol requirement during short surgeries and alleviate postoperative pain.
Anesthesia, General ; Anesthetics ; Cholecystectomy, Laparoscopic* ; Dexmedetomidine* ; Humans ; Pain, Postoperative ; Propofol* ; Visual Analog Scale

No abstract available.
Thrombectomy*

PURPOSE: This study aimed to examine levels of stress and professionalism of nurses who provided nursing care during the 2015 Middle East respiratory syndrome outbreak based on their experience, to investigate the nurses' intention to respond to possible future outbreaks in relation to their experience during the outbreak, and to determine the relationship between the outbreak experience and nursing intention considering stress and professionalism. METHODS: A self-administered questionnairewas designed based on modifications of related questionnaires, and used to assess levels of stress, professionalism, and nursing intention according to participants' experiences during the outbreak. Multiple regression analysiswas used to examine the relationship between the outbreak nursing experience and nursing intention considering stress and nursing professionalism. RESULTS: The overall stress, professionalism, and nursing intention scores for the firsthand experience group were 33.72, 103.00, and 16.92, respectively, whereas those of the secondhand experience group were 32.25, 98.99, and 15.60, respectively. There were significant differences in professionalism and nursing intention scores between the groups (p = .001 and p < .001, respectively). The regression analysis revealed that the regression estimate between stress and nursing intention was B(SE) = −0.08(0.02), beta = −0.21, p < .001 and the regression estimate between professionalism in nursing and nursing intention was B(SE) = 0.05(0.01), beta = 0.23, p < .001. CONCLUSIONS: Prior outbreak nursing experience was importantly associated with intention to provide care for patients with a newly emerging infectious disease in the future considering stress and professionalism. Gathering information about nurses' experience of epidemics and regular assessment of job stress and professionalism are required.
Communicable Diseases* ; Communicable Diseases, Emerging ; Coronavirus ; Coronavirus Infections ; Disease Outbreaks ; Emergencies* ; Hospitals, Public* ; Humans ; Intention* ; Korea* ; Nursing Care ; Nursing* ; Professionalism* ; Stress, Psychological

BACKGROUND: Echocardiography has been routinely performed before liver transplantation to screen perioperative risks due to cardiovascular complications. However, only limited echocardiographic indices have been used and have become familiar with clinicians. Here we aimed to evaluate the relationship between preoperative echocardiography and circulatory manifestations during living donor liver transplantation (LDLT). METHODS: Perioperative data including preoperative echocardiographic indices and intraoperative circulatory manifestations from 159 LDLT recipients (> or =18 years) were retrospectively collected. Relationships between individual echocardiographic indices and intraoperative circulatory manifestations were assessed by Pearson or Spearman correlation test. Intraoperative circulatory manifestations showing potential correlation with echocardiographic indices (r > or = 0.2 or < or =-0.2) were additionally analyzed by unpaired t or chi-square test after their dichotomizations at clinically meaningful cutoffs. RESULTS: Strong correlations (r > or = 0.5 or < or =-0.5) were not found between echocardiographic indices and intraoperative circulatory manifestations, but intensive vasopressor coverage, urine output, sodium bicarbonate administration and last blood pH showed potential relations with at least one of preoperative echocardiographic indices. Early and late (atrial) ventricular filling velocity (E/A) ratios were lower in recipients with intensive vasopressor coverage, and left atrial diameter (LAD) were larger in recipients with last blood pH < 7.25. However, other parts of echocardiographic indices showed inconsistent relationships with formerly prevalent knowledge. CONCLUSIONS: Preoperative echocardiographic indices such as E/A ratio and LAD showed relationship with circulatory manifestations during LDLT. However, low correlation degrees and lack of evidence in reverse relationship with circulatory manifestations demands further studies focusing on such specific cardiac function.
Echocardiography ; Humans ; Hydrogen-Ion Concentration ; Liver ; Liver Transplantation ; Living Donors ; Retrospective Studies ; Sodium Bicarbonate

Awake craniotomy is indicated for tumor resection involving eloquent cortex. It allows the operator to perform appropriate cortical mapping during surgery and facilitate maximum tumor resection while minimizing neurologic deficit. Therefore anesthesia should provide adequate analgesia and sedation but also importantly a full consciousness and cooperation for neurologic testing. This case reports the use of target-controlled infusion (TCI) and monitoring of sedation and anesthetic depth through bispectral index (BIS), providing good control of sedation and analgesia to meet frequent changes throughout the different levels of the procedure while maintaining good condition for intraoperative brain mapping. We propose that TCI of propofol and remifentanil in combination may be a useful alternative for awake craniotomy requiring intraoperative brain mapping surgery.
Analgesia ; Anesthesia ; Brain Mapping ; Conscious Sedation ; Consciousness ; Craniotomy ; Neurologic Manifestations ; Piperidines ; Propofol

BACKGROUND: Patients with morbid obesity have higher risk of fatal thromboembolic episodes than non-obese patients. We aimed to identify perioperative changes in blood coagulation for the patients undergoing bariatric surgery and compare thromboelastography (TEG) findings with non-obese patients. METHODS: 24 patients with morbid obesity (group B) and 22 patients with stomach cancer (group S) who undergoing laparoscopic Roux-en-Y gastric bypass surgery were prospectively studied. Laboratory coagulation-related tests and TEG were conducted immediately after anesthetic induction (T0), at 2 hours after surgical incision (T1), and 2 hours after the end of surgery (T2). RESULTS: Group B had higher serum lactate, fibrinogen, maximum amplitude in TEG findings, and shorter activated partial thromboplastin time (aPTT) than group S at T0 (P < 0.05). In group B, serum fibrinogen degradation products (FDP) at T2 and base deficit at T1 and T2 were higher, and aPTT was shorter than those at T0 (P < 0.05). R-time and k-time showed gradual shortening toward T2. alpha-angle at T1 and coagulation index at T2 increased significantly from those at T0 in the group B (P < 0.05). However, group B failed to show any significant differences from the group S in TEG and coagulation-related laboratory findings except platelet count and serum fibrinogen level at T1 and T2. CONCLUSIONS: Preoperatively, morbidly obese patients had more activated coagulation profiles than non-obese patients. However, remarkable perioperative changes in TEG findings could not be definitely observed between two groups.
Bariatric Surgery ; Blood Coagulation ; Fibrinogen ; Gastric Bypass ; Humans ; Lactic Acid ; Obesity, Morbid ; Partial Thromboplastin Time ; Platelet Count ; Prospective Studies ; Stomach Neoplasms ; Thrombelastography ; Thrombophilia

Opioids are generally used to treat severe cancer pain. Usually, it is common to increase the dose of opioids to maintain analgesia. Opioid-induced hyperalgesia (OIH) is a paradoxical response to opioid resulting in increased perception of pain rather than antinociceptive effect. A 64-year-old female with pancreatic cancer was suffering from whole abdominal pain. She took massive opioid therapy, however, her pain had been worse and widen in the 3 months. Radiologic imaging was performed to exclude metastatic cancer. The result was negative. We suspected OIH, and reduced the amount of opioids, then, added to adjuvant analgesics. And also we performed celiac plexus neurolysis with the use of alcohol and continuous epidural catheter insertion. Her numeric rating pain scale (NRS) decreased from 9/10 to 3/10. This case suggests that adjuvant analgesics and interventional treatments can resolve a OIH patient with intractable cancer pain.
Abdominal Pain ; Analgesia ; Analgesics ; Analgesics, Opioid ; Catheters ; Celiac Plexus ; Female ; Humans ; Hyperalgesia ; Middle Aged ; Pain Management ; Pancreatic Neoplasms ; Stress, Psychological