Perioperative adverse cardiac events and mortality after non-cardiac surgery: a multicenter study / 대한마취과학회지

Background@#Perioperative adverse cardiac events (PACE), a composite of myocardial infarction, coronary revascularization, congestive heart failure, arrhythmic attack, acute pulmonary embolism, cardiac arrest, and stroke during 30-day postoperative period, is associated with long-term mortality, but with limited clinical evidence. We compared long-term mortality with PACE using data from nationwide multicenter electronic health records. @*Methods@#Data from 7 hospitals, converted to Observational Medical Outcomes Partnership Common Data Model, were used. We extracted records of 277,787 adult patients over 18 years old undergoing non-cardiac surgery for the first time at the hospital and had medical records for more than 180 days before surgery. We performed propensity score matching and then an aggregated meta‑analysis. @*Results@#After 1:4 propensity score matching, 7,970 patients with PACE and 28,807 patients without PACE were matched. The meta‑analysis showed that PACE was associated with higher one-year mortality risk (hazard ratio [HR]: 1.33, 95% CI [1.10, 1.60], P = 0.005) and higher three-year mortality (HR: 1.18, 95% CI [1.01, 1.38], P = 0.038). In subgroup analysis, the risk of one-year mortality by PACE became greater with higher-risk surgical procedures (HR: 1.20, 95% CI [1.04, 1.39], P = 0.020 for low-risk surgery; HR: 1.69, 95% CI [1.45, 1.96], P < 0.001 for intermediate-risk; and HR: 2.38, 95% CI [1.47, 3.86], P = 0.034 for high-risk). @*Conclusions@#A nationwide multicenter study showed that PACE was significantly associated with increased one-year mortality. This association was stronger in high-risk surgery, older, male, and chronic kidney disease subgroups. Further studies to improve mortality associated with PACE are needed.

Isoflavone‑enriched soybean leaves (Glycine max) restore loss of dermal collagen fibers induced by ovariectomy in the Sprague Dawley rats / 한국실험동물학회지

Phytoestrogens, such as isoflavones, are known for their capacity to simulate various physiological impacts of estro‑ gen in the human body. Our research evaluated the effects of isoflavone-enriched soybean leaves (IESL) on collagen fiber loss prompted by ovariectomy in Sprague Dawley (SD) rats, thereby simulating menopausal changes in women.IESL, bolstered with an increased concentration of isoflavones through a metabolite farming process, contained a significantly higher amount of isoflavones than regular soybean leaves. Our results indicate that the administration of IESL can counteract the decrease in relative optical density and dermal thickness of collagen fibers caused by ova‑ riectomy in SD rats, with more pronounced effects observed at higher isoflavone dosages. These outcomes suggest that soybean leaves rich in isoflavones may hold potential benefits in combating collagen degradation and skin aging symptoms related to menopause. Further research is needed to fully understand the exact molecular pathways at play and the potential clinical relevance of these findings.

Epidural hematoma treated by aspiration after transforaminal epidural steroid injection - A case report -

Background@#Spinal epidural hematoma is rare condition that can rapidly develop into severe neurologic deficits. The pathophysiology of this development remains unclear. There are several case reports of emergency hematoma evacuations after epidural steroid injection. Case: We report on two patients who developed acute, large amounts of epidural hematoma without neurological deficits after transforaminal epidural steroid injection. After fluoroscopy guided aspiration for epidural hematoma was performed, neurological defects did not progress and the hematoma was shown to be absorbed on magnetic resonance imaging. @*Conclusions@#These reports are believed to be the first of treating epidural hematoma occurring after transforaminal epidural steroid injection through non-surgical hematoma aspiration. If large amounts of epidural hematoma are not causing neurological issues, it can be aspirated until it is absorbed.

Epidural hematoma treated by aspiration after transforaminal epidural steroid injection - A case report -

Background@#Spinal epidural hematoma is rare condition that can rapidly develop into severe neurologic deficits. The pathophysiology of this development remains unclear. There are several case reports of emergency hematoma evacuations after epidural steroid injection. Case: We report on two patients who developed acute, large amounts of epidural hematoma without neurological deficits after transforaminal epidural steroid injection. After fluoroscopy guided aspiration for epidural hematoma was performed, neurological defects did not progress and the hematoma was shown to be absorbed on magnetic resonance imaging. @*Conclusions@#These reports are believed to be the first of treating epidural hematoma occurring after transforaminal epidural steroid injection through non-surgical hematoma aspiration. If large amounts of epidural hematoma are not causing neurological issues, it can be aspirated until it is absorbed.

Glutamine Supplementation Ameliorates Chronic Stress-induced Reductions in Glutamate and Glutamine Transporters in the Mouse Prefrontal Cortex

Chronic immobilization stress (CIS) induces low levels of glutamate (Glu) and glutamine (Gln) and hypoactive glutamatergic signaling in the mouse prefrontal cortex (PFC), which is closely related to the Glu-Gln cycle. A Gln-supplemented diet ameliorates CIS-induced deleterious changes. Here, we investigated the effects of CIS and Gln supplementation on Glu-Gln cycle-related proteins to characterize the underlying mechanisms. Using the CIS-induced depression mouse model, we examined the expression of 11 proteins involved in the Glu-Gln cycle in the PFC. CIS decreased levels of glutamate transporter 1 (GLT1) and sodium-coupled neutral amino acid transporter (SNAT) 1, SANT2, SNAT3, and SNAT5. Gln supplementation did not affect the non-stressed group but significantly increased GLT1 and SNATs of the stressed group. By immunohistochemical analysis, we confirmed that SNAT1 and SNAT2 were decreased in neurons and GLT1, SNAT3, and SNAT5 were decreased in astrocytes in the medial PFC of the stressed group, but Gln-supplemented diet ameliorated these decrements. Collectively, these results suggest that CIS may cause depressive-like behaviors by decreasing Glu and Gln transportation in the PFC and that a Gln-supplemented diet could prevent the deleterious effects of CIS.

Painless cervical motor radiculopathy relieved by cervical epidural steroid injection: A case report

A 15-year-old male patient presented with a slow progression of painless right shoulder weakness over the previous six weeks. The magnetic resonance imaging revealed right C4–5 foraminal stenosis caused by right foraminal disc protrusion. The needle electromyography and nerve conduction studies revealed acute C5 and/or C6 radiculopathy. Instead of the initial surgical management modalities, we performed a cervical epidural steroid injection at the C4–5 level. From the day after the patient received the cervical epidural steroid injection, his right shoulder motor weakness improved progressively. Two weeks after the procedure, his right shoulder motor function had fully recovered.

Simplified equation for determining proper depth of peripherally inserted central catheter in relation to anatomical landmarks / 대한마취과학회지

BACKGROUND: The aim of this study was to develop a formula guiding the peripherally inserted central catheter (PICC) tip placement based on anatomical landmarks such as the upper arm, clavicle, and sternum as well as the patient’s height, weight, and body mass index. METHODS: Fifty-five patients who were scheduled to have PICCs were included in the study. We measured four distances along the passage of the PICC, which were as follows; the tip of the third finger to the middle of the elbow crease (Distance A), the middle of the elbow crease to the acromion process (Distance B), the acromion process to the sternal head of the clavicle (Distance C), and the sternal head of the clavicle to the end of the xiphoid process (Distance D). The lengths from the elbow creases to their carina bifurcations as determined by fluoroscopy during PICC insertions were recorded and used as reference. RESULTS: The formula for determining PICC depth based on the four distances was determined by regression analysis. The optimal formula was determined to be 25.3 + 0.5 × (Distance C) + 0.6 × (Distance D) which yielded an R2 value of 0.3. CONCLUSIONS: The formula proposed for proper depth of the adult, 25.0 + 0.5 × (clavicle length) + 0.6 × (sternum length) for PICC insertion can be used to place the tip at the carina bifurcation level. The distance from elbow crease to catheter insertion point should be added to the length generated by this formula.

Spino-Pelvic Parameters in Adult Spinal Deformities / 대한정형외과학회잡지

In the recent 10 to 15 years, the most popular issue in the spine field is evaluation and treatment of the sagittal alignment and sagittal balance of the spine. Adult spine deformity (ASD) includes not only coronal deformity, such as degenerative scoliosis, but also sagittal deformity. Degenerative scoliosis is also associated with sagittal deformity of the spine. Even in degenerative scoliosis, accompanying sagittal deformity is more important to clinical symptoms than coronal deformity. Sagittal deformity of the spine is significantly correlated with health-related quality of life score, such as visual analogue scale and Oswestry disability index, short form-36 health survey. For the appropriate evaluation and treatment of ASD, understanding the normal and abnormal sagittal alignment and sagittal balance of the spine is very important. Various compensatory mechanisms should be applied in order to maintain the balanced upright posture. Assessment of the compensatory mechanism is also mandatory for proper surgical planning. Some spinopelvic parameters show particularly high correlation with clinical symptoms in case of sagittal imbalance. Therefore, assessment of these parameters is necessary for evaluation of surgical outcomes.

Groin and buttock claudication associated with vascular origin due to chronic occlusion of internal iliac artery: A case report

Neurogenic and vascular claudication is sometimes difficult to distinguish from each other due to similarities in symptoms. Symptoms and physical examinations may not always match the severity in both diseases, and when atypical symptoms, such as groin pain, are present, diagnosis can be more challenging. Proper differential diagnosis of the two is important because of the invasiveness of treatment in both diseases. We report a rare case of a patient with severe groin and buttock pain due to chronic occlusion of the internal iliac artery, along with a review of the relevant literature.

Myeloid-specific SIRT1 Deletion Aggravates Hepatic Inflammation and Steatosis in High-fat Diet-fed Mice

Sirtuin 1 (SIRT1) is a mammalian NAD+-dependent protein deacetylase that regulates cellular metabolism and inflammatory response. The organ-specific deletion of SIRT1 induces local inflammation and insulin resistance in dietary and genetic obesity. Macrophage-mediated inflammation contributes to insulin resistance and metabolic syndrome, however, the macrophage-specific SIRT1 function in the context of obesity is largely unknown. C57/BL6 wild type (WT) or myeloid-specific SIRT1 knockout (KO) mice were fed a high-fat diet (HFD) or normal diet (ND) for 12 weeks. Metabolic parameters and markers of hepatic steatosis and inflammation in liver were compared in WT and KO mice. SIRT1 deletion enhanced HFD-induced changes on body and liver weight gain, and increased glucose and insulin resistance. In liver, SIRT1 deletion increased the acetylation, and enhanced HFD-induced nuclear translocation of nuclear factor kappa B (NF-kappaB), hepatic inflammation and macrophage infiltration. HFD-fed KO mice showed severe hepatic steatosis by activating lipogenic pathway through sterol regulatory element-binding protein 1 (SREBP-1), and hepatic fibrogenesis, as indicated by induction of connective tissue growth factor (CTGF), alpha-smooth muscle actin (alpha-SMA), and collagen secretion. Myeloid-specific deletion of SIRT1 stimulates obesity-induced inflammation and increases the risk of hepatic fibrosis. Targeted induction of macrophage SIRT1 may be a good therapy for alleviating inflammation-associated metabolic syndrome.

FK506 reduces calpain-regulated calcineurin activity in both the cytoplasm and the nucleus / 대한해부학회지

Excessive immune responses induced by ischemia-reperfusion injury (IRI) are known to lead to necrotic and apoptotic cell death, and calcineurin plays a major role in this process. Calcineurin dephosphorylates the nuclear factor of activated T-cells (NFAT), permitting its translocation into the nucleus. As a result, calcineurin promotes the release of pro-inflammatory cytokines, such as tumor necrosis factor-alpha. The overproduction of pro-inflammatory cytokines causes renal cell death. Calcineurin activity is regulated by calpain, a cysteine protease present in the nucleus. Calpain-mediated proteolysis increases the phosphatase activity of calcineurin, resulting in NFAT dephosphorylation. This process has been studied in cardiomyocytes but its role in renal IRI is unknown. Thus, we examined whether calpain regulates calcineurin in renal tubule nuclei. We established an in vivo renal IRI model in mice and identified the protective role of a calcineurin inhibitor, FK506, in this process. Calcineurin is expressed in the nucleus, where it is present in its calpain-cleaved form. FK506 reduced nuclear expression of calcineurin and prevented calcineurin-mediated NFAT activation. Our study shows clearly that FK506 reduces calpain-mediated calcineurin activity. Consequently, calcineurin could not maintain NFAT activation. FK506 reduced renal cell death by suppressing the transcription of pro-inflammatory cytokine genes. This study provides evidence that FK506 protects against inflammation in a renal IRI mouse model. We also provided a mechanism of calcineurin action in the nucleus. Therefore, FK506 could improve renal function by decreasing calcineurin activity in both the cytoplasm and the nucleus of renal tubule cells.

FK506 reduces calpain-regulated calcineurin activity in both the cytoplasm and the nucleus / 대한해부학회지

Excessive immune responses induced by ischemia-reperfusion injury (IRI) are known to lead to necrotic and apoptotic cell death, and calcineurin plays a major role in this process. Calcineurin dephosphorylates the nuclear factor of activated T-cells (NFAT), permitting its translocation into the nucleus. As a result, calcineurin promotes the release of pro-inflammatory cytokines, such as tumor necrosis factor-alpha. The overproduction of pro-inflammatory cytokines causes renal cell death. Calcineurin activity is regulated by calpain, a cysteine protease present in the nucleus. Calpain-mediated proteolysis increases the phosphatase activity of calcineurin, resulting in NFAT dephosphorylation. This process has been studied in cardiomyocytes but its role in renal IRI is unknown. Thus, we examined whether calpain regulates calcineurin in renal tubule nuclei. We established an in vivo renal IRI model in mice and identified the protective role of a calcineurin inhibitor, FK506, in this process. Calcineurin is expressed in the nucleus, where it is present in its calpain-cleaved form. FK506 reduced nuclear expression of calcineurin and prevented calcineurin-mediated NFAT activation. Our study shows clearly that FK506 reduces calpain-mediated calcineurin activity. Consequently, calcineurin could not maintain NFAT activation. FK506 reduced renal cell death by suppressing the transcription of pro-inflammatory cytokine genes. This study provides evidence that FK506 protects against inflammation in a renal IRI mouse model. We also provided a mechanism of calcineurin action in the nucleus. Therefore, FK506 could improve renal function by decreasing calcineurin activity in both the cytoplasm and the nucleus of renal tubule cells.

T-Condylar Fracture of Distal Humerus in a Child: A Case Report

T-condylar fracture is a type of distal humerus fracture. T-condylar fracture in children is rare, with reported incidence of less than 1% of T-condylar fractures. The mean reported age of T-condylar fracture in children is 11. Cases in children under 5 years-old are extremely rare. Herein, we report on a T-condylar fracture of the distal humerus in a 5-year-old boy. This patient was treated with open reduction and K-wire fixation through the posterolateral approach. The result of treatment was satisfactory; therefore, we report this case.

Combined third occipital and C3 deep medial branch neurotomy in a patient with C2-3 facet joint osteoarthritis associated cervicogenic headaches: A case report

Cervicogenic headache is pain from the head due to various sources in the cervical spine. The C2-3 zygapophysial joints are the most commonly involved structure, and this type of headache could be relieved by blocks or neurotomy of the third occipital nerve. A 59-years-old female patient suffered from cervicogenic headaches due to severe C2-3 zygapophysial joint hypertrophy. Her pain was partially relieved by the third occipital radiofrequency neurotomy, and was almost completely removed by C3 deep medial branch neurotomy. Herein, we report a case of osteoarthritis associated cervicogenic headaches at the C2-3 zygapophysial joints and proposed a treatment option.

Blue toe syndrome treated with sympathectomy in a patient with acute renal failure caused by cholesterol embolization

Blue toe syndrome is the most frequent manifestation of tissue ischemia caused by cholesterol embolization (CE), which can lead to amputation of affected lower extremities, if severe. However, any effective treatment is lacking. We experienced a case of spontaneously presenting blue toe syndrome and concomitant acute renal failure in a patient with multiple atherosclerotic risk factors. CE was confirmed by renal biopsy. Despite medical treatment including prostaglandin therapy and narcotics, the toe lesion progressed to gangrene with worsening ischemic pain. Therefore, we performed lumbar sympathectomy, which provided dramatic pain relief as well as an adequate blood flow to the ischemic lower extremities, resulting in healing of the gangrenous lesion and avoiding toe amputation. This is the first reported case of a patient with intractable ischemic toe syndrome caused by CE that was treated successfully by sympathectomy. Our observations suggest that sympathectomy may be beneficial in some patients with CE-associated blue toe syndrome.

Effects of Chronic Restraint Stress on Body Weight, Food Intake, and Hypothalamic Gene Expressions in Mice

BACKGROUND: Stress affects body weight and food intake, but the underlying mechanisms are not well understood. METHODS: We evaluated the changes in body weight and food intake of ICR male mice subjected to daily 2 hours restraint stress for 15 days. Hypothalamic gene expression profiling was analyzed by cDNA microarray. RESULTS: Daily body weight and food intake measurements revealed that both parameters decreased rapidly after initiating daily restraint stress. Body weights of stressed mice then remained significantly lower than the control body weights, even though food intake slowly recovered to 90% of the control intake at the end of the experiment. cDNA microarray analysis revealed that chronic restraint stress affects the expression of hypothalamic genes possibly related to body weight control. Since decreases of daily food intake and body weight were remarkable in days 1 to 4 of restraint, we examined the expression of food intake-related genes in the hypothalamus. During these periods, the expressions of ghrelin and pro-opiomelanocortin mRNA were significantly changed in mice undergoing restraint stress. Moreover, daily serum corticosterone levels gradually increased, while leptin levels significantly decreased. CONCLUSION: The present study demonstrates that restraint stress affects body weight and food intake by initially modifying canonical food intake-related genes and then later modifying other genes involved in energy metabolism. These genetic changes appear to be mediated, at least in part, by corticosterone.

Effects of Chronic Restraint Stress on Body Weight, Food Intake, and Hypothalamic Gene Expressions in Mice

BACKGROUND: Stress affects body weight and food intake, but the underlying mechanisms are not well understood. METHODS: We evaluated the changes in body weight and food intake of ICR male mice subjected to daily 2 hours restraint stress for 15 days. Hypothalamic gene expression profiling was analyzed by cDNA microarray. RESULTS: Daily body weight and food intake measurements revealed that both parameters decreased rapidly after initiating daily restraint stress. Body weights of stressed mice then remained significantly lower than the control body weights, even though food intake slowly recovered to 90% of the control intake at the end of the experiment. cDNA microarray analysis revealed that chronic restraint stress affects the expression of hypothalamic genes possibly related to body weight control. Since decreases of daily food intake and body weight were remarkable in days 1 to 4 of restraint, we examined the expression of food intake-related genes in the hypothalamus. During these periods, the expressions of ghrelin and pro-opiomelanocortin mRNA were significantly changed in mice undergoing restraint stress. Moreover, daily serum corticosterone levels gradually increased, while leptin levels significantly decreased. CONCLUSION: The present study demonstrates that restraint stress affects body weight and food intake by initially modifying canonical food intake-related genes and then later modifying other genes involved in energy metabolism. These genetic changes appear to be mediated, at least in part, by corticosterone.

Contralateral complete L5 palsy following ipsilateral L4 selective transforaminal epidural block / 대한마취과학회지

No abstract available.

Rescue of hemodynamic compromise in superior vena cava syndrome with transesophageal echocardiography / 대한마취과학회지

No abstract available.

Percutaneous bipolar radiofrequency T3 sympathicotomy in Raynaud's disease: A case report / 대한마취과학회지

A 54-year-old female was suffering from cold-induced Raynaud's attacks in her both hands with symptoms most severe in her left hand. As the patient did not respond to previous medical treatments and endoscopic thoracic sympathectomy, we performed percutaneous bipolar radiofrequency thoracic sympathicotomy at the left T3 vertebral level. After the procedure, the patient obtained a long duration of symptom relief over 3 years. Percutaneous bipolar radiofrequency T3 sympathicotomy is minimally invasive and effective technique by creating large continuous strip lesion.