Association of Sleep Perception With Objective and Subjective Sleep Variables in Insomnia Patients / 수면정신생리

Objectives@#Our study aims to investigate the clinical and polysomnographic variables associated with subjective sleep perception. @*Methods@#Among the patients who underwent nocturnal polysomnography (PSG) at the Center for Sleep and Chronobiology of Seoul National University Hospital from May 2018 to July 2019, 109 diagnosed with insomnia disorder based on DSM-5 were recruited for the study, and their medical records were retrospectively analyzed. Self-report questionnaires about clinical characteristics including Pittsburgh sleep quality index (PSQI), Beck depression inventory (BDI), and Epworth sleepiness scale (ESS) were completed. Subjective sleep quality was measured using variables of subjective total sleep time (subjective TST), subjective sleep onset latency (subjective SOL), subjective number of awakenings, morning feeling after awakening, and sleep discrepancy (subjective TST–objective TST) the morning after PSG. Pearson and Spearman correlation analyses were used to determine the factors associated with subjective sleep perception. @*Results@#In patients with insomnia, subjective TST was negatively correlated with Wake After Sleep Onset (WASO) (p = 0.001) and N1 sleep (p = 0.039) parameters on polysomnography. Also, it was negatively correlated with PSQI (p < 0.001) and BDI (p = 0.014) scores. Sleep discrepancy was negatively correlated with PSQI score (p = 0.018). Morning feeling was negatively correlated with PSQI (p = 0.019) and BDI (p < 0.001) scores. @*Conclusion@#Our results demonstrated that subjective sleep perception is associated with PSG variables (WASO and N1 sleep) and with PSQI and BDI scores. In clinical practice, it is helpful to assess and manage insomnia patients in consideration of objective sleep variables, subjective sleep quality, and depressed mood, which can influence subjective sleep perception.

The Moderating Effect of Sleep Disturbance on the Association of Stress with Impulsivity and Depressed Mood

Objective@#This study was performed to investigate the associations of life event stress with impulsivity, anxiety, and depressed mood as a function of the presence of a sleep disturbance. @*Methods@#In total, 214 participants (age 38.96±10.53 years; 111 females) completed self-report questionnaires, including the Life Experience Survey (LES), Pittsburgh Sleep Quality Index (PSQI), Barratt’s Impulsivity Scale (BIS), Beck Anxiety Inventory (BAI), and Beck Depression Inventory (BDI). The presence of a sleep disturbance was defined as a PSQI score >5. @*Results@#In total, 127 participants presented with a sleep disturbance (age 39.33±10.92 years; 64 females), whereas the remaining 87 did not (age 38.43±9.97 years; 47 females). Negative LES scores were significantly correlated with BIS (r=0.22, p=0.001), BAI (r=0.46, p< 0.001), and BDI (r=0.51, p<0.001) scores, and PSQI scores were significantly correlated with BAI (r=0.49, p<0.001) and BDI (r=0.60, p< 0.001) scores. Moderation analysis revealed statistically significant interactions between negative LES scores and the presence of a sleep disturbance on BIS (p=0.044) and BDI (p=0.014) but not on BAI (p=0.194) scores. @*Conclusion@#The findings of the present study suggest that life event stress has varying degrees of influence on mental health, especially impulsivity and depressed mood, depending on the presence or absence of a sleep disturbance.

Decreased Nocturnal Blood Pressure Dipping in Patients with Periodic Limb Movements in Sleep / 수면정신생리

OBJECTIVES: Previous studies have shown that periodic limb movements in sleep (PLMS) could be one of risk factors for cardiovascular morbidity. The purpose of this study was to investigate the association between PLMS and blood pressure changes during sleep. METHODS: We analyzed data from 358 adults (176 men and 182 women) aged 18 years and older who were free from sleep apnea syndrome (Respiratory Disturbance Index 15)]. Blood pressure change patterns were compared using repeated measures analysis of variance. RESULTS: Systolic blood pressure in the high PLMI group was lower than that in the low PLMI group (p = 0.036). These results were also significant when adjusted for gender and age, but were not statistically significant when adjusted for BMI, alcohol, smoking, anti-hypertension medication use and sleep efficiency (p = 0.098). Systolic blood pressure dropped by 9.7 mm Hg in the low PLMI group, and systolic blood pressure in the high PLMI group dropped by 2.9 mm Hg. There was a significant difference in delta systolic blood pressure after sleep between the two groups in women when adjusted for age, BMI, alcohol, smoking, antihypertensive medication use and sleep efficiency (p = 0.023). CONCLUSION: PLMS was significantly associated with a decreasing pattern in nocturnal BP during sleep, and this association remained significant in women when adjusted for age, BMI, alcohol, smoking, antihypertension medication use and sleep efficiency related to blood pressure. We suggest that PLMS may be associated with cardiovascular morbidity.

Preliminary Study on Quantitative Sleep EEG Characteristics in Patients with Schizophrenia

We used quantitative electroencephalography (EEG) spectral analysis to compare activity in the bilateral frontal, central, and occipital areas in nine patients with schizophrenia and ten healthy control subjects during standard nocturnal polysomnography. Patients with schizophrenia had longer sleep latency than controls. In N2 sleep, the patients had significantly lower 0.5–1 Hz power and higher theta power in the left frontal region, and higher beta power in the left occipital region than did control subjects. In N3 sleep, the patients with schizophrenia had significantly higher alpha power in the left occipital region than did controls. These findings show distinctive EEG sleep patterns in patients with schizophrenia, which may reflect brain dysfunction or medication effects.

Comparison of prophylactic anti-emetic effects of ramosetron between single bolus administration and continuous infusion following bolus administration

BACKGROUND: The authors hypothesized that the continuous infusion of ramosetron 0.15 mg following a 0.15 mg bolus administration would maintain higher 5-hydroxytryptamine type 3 receptor occupancy levels and be more effective in preventing postoperative nausea and vomiting (PONV) than a 0.3 mg single bolus administration. We conducted a study to compare the efficacy of single bolus ramosetron administration with the combination of continuous infusion following intravenous bolus administration for PONV prophylaxis. METHODS: One hundred and fifty female patients undergoing thyroidectomy were allocated randomly to one of three groups to receive a placebo (Group 1, n = 49), 0.3 mg of IV ramosetron (Group 2, n = 53), or the continuous infusion of 0.15 mg ramosetron following a bolus administration of 0.15 mg of ramosetron (Group 3, n = 48). Anesthesia was maintained with sevoflurane and N2O. The incidence of PONV, nausea severity, and use of rescue antiemetics during the postoperative 24 hours were recorded. RESULTS: Group 1 showed higher incidences of PONV during the postoperative 24 hour than Group 2 (81% vs. 58%, P = 0.02) and Group 3 (81% vs. 48%, P < 0.01), but there was no difference between Groups 2 and 3 (P = 0.39). The use of rescue antiemetics was significantly lower in Groups 2 and 3 than Group 1 during the postoperative 6 to 24 hours. CONCLUSIONS: There were no significant differences of incidence and severity of PONV between ramosetron 0.3 mg single bolus administration and the combination of ramosetron infusion after 0.15 mg bolus administration.

Jugular Bulb Venous Oxygen Saturation Monitoring in Brain Surgery / 대한마취과학회지

BACKGROUND: During intracranial brain surgery, numerous factors may alter cerebral blood flow and the oxygen supply-demend balance. Continuous monitoring of the jugular bulb venous oxygen saturation (SjvO2) may help in the anesthetic management of such procedures. METHODS: Fiberoptic SjvO2 was continuously monitored and recorded 1, 3 and 5 min after the skin incision, skull bone craniotomy, dura open and dura closure in 20 patients. RESULTS: The SjvO2 was increased after the skin (scalp) incision at 1, 3 and 5 minutes and also after endotracheal suctioning for removal of secretions. CONCLUSIONS: Although the accuracy of Fibroptic SjvO2 determination is limited, it allows the detection of cerebral blood flow and oxygen supply-demend imbalance during brain surgery. The frequent occurance of SjvO2 elevations is suggestive of reactive hyperemia mechaniams.

The Effect of Epidural Lidocaine Infused with Morphine on Pain and Bowel Motility after Hysterectomy / 대한마취과학회지

BACKGROUND: Postoperative ileus is considered to be caused by the activation of spinal reflexes originating from the abdominal cavity with the sympathetic nerves as the efferent nerves. Epidural anesthesia as a perioperative adjunct has been shown to provide superior pain control, and has been implicated in more rapid postoperative ileus resolution possibly through a sympathetic block mechanism. This study was undertaken to compare the effects of epidural morphine-lidocaine with those of epidural morphine alone on postoperative bowel motility and pain. METHODS: Forty-four ASA I or II women scheduled for transabdominal hysterectomy were considered for the study. They were randomly allocated to one of two groups. Group M (n = 22) received postoperative epidural morphine 16 mg by infusion pump, 2 ml/h, for 2 days, group ML (n = 22) received morphine 16 mg plus 0.42% lidocaine by infusion pump, 2 ml/h, for 2 days. Both group received morphine 4 mg in 0.5% lidocaine 8 ml epidurally as a single bolus when the peritoneum was closed. Postoperative pain, and the time interval from termination of operation to the first passage of flatus were checked RESULTS: In group ML, the times for first passing of flatus (33.4 +/- 10.5 h; mean +/- SD) and visual analogue scale score (0.3 +/- 0.6) were significantly shorter and lower than in group M (flatus 42.6 +/- 8.4 h and VAS score 1.3 +/- 1.7). CONCLUSIONS: The epidural lidocaine infused with morphine demonstrated earlier recovery of bowel motility and better postoperative pain relief than the epidural morphine alone.

Anesthetic Management for Xypho-Omphalopagus Conjoined Twins / 대한마취과학회지

This report describes the perioperative anesthetic management for surgical separation of xypho-omphalopagus conjoined twins. Male conjoined twins were delivered by cesarian section after 36 weeks plus 2 days gestation. A preoperative functional evaluation was performed in assessing the feasibility of surgical separation. A partial communication of the lower margin of the sternum and a union of the livers were found but with separate biliary and vascular systems. One twin (twin-B) had a small ASD. The twins were separated at 5 days of the birth. After induction with ketamine and succinylcholine, both infants were intubated and inhalated with isoflurane, N2O and O2 respectively. Continuous arterial pressure via the femoral artery and central venous pressure via the internal jugular vein were monitored. During the induction of anesthesia, an injected bolus of ketamine and succinylcholine to one twin was not effective for the other twin. Inhaled isoflurane in one twin did not appear in the expired gas of the other twin. During the operation, the intentional hemorrhage from one twin (twin-B) caused a reduction to some degree of blood pressure and SpO2 in the other twin. We must be careful in the anesthetic management of the surgical separation of conjoined twins to consider pharmacological and cross-circulation pathophysiology.