Antipsychotic Medication in Schizophrenic Patients is Associated with Higher Risks of Developing Bone Fractures and Refractures.

OBJECTIVE: : The relationship of antipsychotics and the risk of refracture in treated patients is unclear. The aim of this study is to evaluate the association between prolonged antipsychotic and the incidences of bone fractures and refractures in schizophrenia. METHODS: This is a retrospective nested case-control study using Taiwan National Health Insurance Research Database recorded from 2000 to 2005, with cases followed up to end of 2011. Total of 7,842 schizophrenic patients, 3,955 had developed bone fractures were compared with 3,887 control subjects matched in age, sex, and index date. Antipsychotic drug exposure was classified based on the drug type and medication duration. Conditional logistic regression analyses were performed. Odds ratio (OR) and confidence interval (CI) were calculated. RESULTS: We found (after adjustments) higher risks of developing fractures under continued use of typical (OR = 1.70; 95% CI, 1.51-1.91) or atypical antipsychotics (OR = 1.43; 95% CI, 1.28-1.60) were found. Additionally, continued use typical (OR = 1.84; 95% CI, 1.35-2.50) or atypical antipsychotics (OR = 1.44; 95% CI, 1.06-1.95) was positively associated with refracture risks. Moreover, refractures were associated with continuous use of chlorpromazine (one typical antipsychotics, OR = 2.45; 95% CI, 1.14-5.25), and risperidone (OR = 1.48; 95% CI, 1.01-2.16) or zotepine (OR = 2.15; 95% CI, 1.06-4.36) (two atypical antipsychotics). CONCLUSION: Higher risks of bone fracture and refracture were found in schizophrenia under prolonged medication with typical or atypical antipsychotics. We therefore recommend that clinicians should pay more attention on bone density monitoring for patients using long-term antipsychotics.

Hyperspectral imaging for skin assessment in systemic sclerosis: a pilot study.

OBJECTIVE: Hyperspectral imaging (HSI) is a novel technology for obtaining quantitative measurements from transcutaneous spatial and spectral information. In patients with SSc, the severity of skin tightness is associated with internal organ involvement. However, clinical assessment using the modified Rodnan skin score is highly variable and there are currently no universal standardized protocols. This study aimed to compare the ability to differentiate between SSc patients and healthy controls using skin scores, ultrasound and HSI. METHODS: Short-wave infrared light was utilized to detect the spectral angle mapper (SAM) of HSI. In addition, skin severity was evaluated by skin scores, ultrasound to detect dermal thickness and strain elastography. Spearman's correlation was used for assessing skin scores, strain ratio, thickness and SAM. Comparisons of various assessment tools were performed by receiver operating characteristic curves. RESULTS: In total, 31 SSc patients were enrolled. SAM was positively correlated with skin scores and dermal thickness. In SSc patients with normal skin scores, SAM values were still significantly higher than in healthy controls. SAM exhibited the highest area under the curve (AUC: 0.812, P < 0.001) in detecting SSc compared with skin scores (AUC: 0.712, P < 0.001), thickness (AUC: 0.585, P = 0.009) and strain ratio by elastography (AUC: 0.522, P = 0.510). Moreover, the severity of skin tightness was reflected by the incremental changes of waveforms in the spectral diagrams. CONCLUSION: SAM was correlated with skin scores and sufficiently sensitive to detect subclinical disease. HSI can be used as a novel, non-invasive method for assessing skin changes in SSc.

A Strategic Imperative for Promoting Hospital Branding: Analysis of Outcome Indicators.

BACKGROUND: Optimizing the use of social media to promote hospital branding is important in the present digital era. In Taiwan, only 51.1% of hospitals have official Facebook fan pages. The numbers of likes for these hospitals are also relatively low. OBJECTIVE: Our objective was to establish a special branding team for social media operation, led by top administrators of our hospital. Here we present our strategic imperative for promoting hospital branding as well as an analysis of its effectiveness. METHODS: Led by top administrators, the branding team was formed by 11 divisions to create branding strategies. From 2016 to 2018, the team implemented action plans. All information unique to the hospital was posted on Facebook, as well as on the hospital's official website. To determine the plans' efficiencies, we obtained reference data from Google Analytics, and we compared Facebook Insights reports for 2016 with those for 2017 and 2018. RESULTS: One of the branding team's main missions was to establish branding strategies and to integrate segmental branding messages. In each quarter we regularly monitored a total of 52 action plan indicators, including those for process and outcome, and discussed the results at team meetings. We selected 4 main performance outcome indicators to reflect the effectiveness of the branding efforts. Compared with 2016, the numbers of likes posted on the Facebook fan page increased by 61.2% in 2017 and 116.2% in 2018. Similarly, visits to the hospital website increased by 4.8% in 2017 and 33.1% in 2018. Most Facebook fan page and website viewers were in 2 age groups: 25 to 34 years, and 35 to 44 years. Women constituted 60.42% (14,160/23,436) of Facebook fans and 59.39% (778,992/1,311,605) of website viewers. According to the Facebook Insights reports, the number of likes and post sharing both increased in 2017 and 2018, relative to 2016. Comment messages also increased from 2016 to 2018 (P=.02 for the trend). The most common theme of posts varied over time, from media reports in 2016, to innovative services in both 2017 and 2018. Likes for innovative services posts increased from 2016 through 2018 (P=.045 for the trend). By the end of 2018, we recorded 23,436 cumulative likes for posts, the highest number among medical centers in Taiwan. CONCLUSIONS: We achieved the largest number of Facebook fans among all medical centers in Taiwan. We would like to share our experience with other hospitals that might be interested in engaging in social media for future communications and interactions with their patients.

Inhibitory effects of propofol on Th17 cell differentiation.

Propofol (2,6-diisopropylphenol) is probably the most widely used intravenous anesthetic agent in daily practice. It has been reported to show immunomodulatory activity. However, the effect of propofol on the differention of T cells remains unclear. In this study, we demonstrated for the first time that propofol inhibited both interleukin (IL)-6 plus transforming growth factor-ß (TGF-ß)-induced Th17 cell differentiation in vitro and in LPS-challenged mice. Propofol also suppressed the IL-6-induced phosphorylation of Janus kinase-2 (JAK2)/signal transducer and activator of transcription (STAT3) pathway, a cytokine-activated essential transcription factor in Th17 cell development, which occurred concomitantly with the enhancement of suppressor of cytokine signaling-3 (SOCS3) expression involved in the downregulation of STAT3 phosphorylation. These data extend our knowledge of the immunosuppressive effects of propofol and their underlying mechanism.

Increased Risk of Herpes Zoster in Diabetic Patients Comorbid with Coronary Artery Disease and Microvascular Disorders: A Population-Based Study in Taiwan.

We investigated the association between the risk of herpes zoster (HZ) and diabetes-related macrovascular comorbidities and microvascular disorders in diabetic patients. This retrospective study included 25,345 patients with newly identified HZ and age- and gender-matched controls retrieved from the National Health Insurance Research Database in Taiwan during the period of 2005 to 2011. Multivariate logistic regression analyses were used to calculate the odds ratios (OR) and to assess the risk factors for HZ in diabetic patients with associated macrovascular or microvascular disorders. Risk factors for HZ were significantly increased in cases of diabetes mellitus (DM) compared with those in cases of non-DM controls (20.2% vs. 17.0%, OR = 1.24, p<0.001). Results of age- and gender-adjusted analyses demonstrated a significantly higher risk of HZ in DM patients with accompanying coronary artery disease (CAD) (adjusted OR = 1.21, p<0.001) and microvascular disorders (aOR = 1.32, p<0.001) than in DM patients with other comorbidities but no microvascular disorders. Patients who took thiazolidinedione, alpha-glucosidase inhibitors and insulin had a higher HZ risk than those taking metformin or sulphonylureas alone (aOR = 1.11, 1.14 and 1.18, p<0.001, respectively). Patients who took insulin alone or in combination with other antidiabetic agents had a significantly higher risk of HZ (aOR = 1.25, p<0.001) than those who received monotherapy. Diabetic patients comorbid with coronary artery disease and associated microvascular disorders had an increased risk of HZ occurrence.

Exogenous granulocyte colony-stimulating factor exacerbate pain-related behaviors after peripheral nerve injury.

Previous studies have demonstrated that inflammatory cells produce several mediators that can effectively counteract pain. This study was designed to test the hypothesis that exogenous administration of recombinant mouse granulocyte-colony-stimulating factor (rmG-CSF) to enhance the recruitment of inflammatory cells to painful inflamed sites could attenuate pain in a chronic neuropathic pain model in mice. Our results indicate that treatment with rmG-CSF increased several cytokines and opioid peptides content; however, it did not attenuate but exacerbate neuropathic pain. Our study highlights the potent pro-inflammatory potential of G-CSF and suggests they may be targets for therapeutic intervention in chronic neuropathic pain.

Patient satisfaction with anesthesia care in Taiwan: development and validation of a pilot version of a psychometric questionnaire.

BACKGROUND: To date, no pilot questionnaire of perioperative anesthetic care has been developed based on psychometric methodology in Taiwan. We describe the development and qualitative and quantitative validation of a pilot version of a psychometric questionnaire designed to measure patient satisfaction with perioperative anesthetic care in Taiwan. METHODS: A rigorous protocol was followed and involved expert consultation, literature review, development of the interview guide, semi-structured in-depth interviews, pretest and application of Aiken's two quantitative methods to determine the content validity coefficient (V value) and homogeneity reliability coefficient (H value) of each item, and the questionnaire as a whole, to ensure the pilot questionnaire showed high-content validity and reliable homogeneity. RESULTS: Our final pilot questionnaire contained six dimensions with 32 items; five of the domains were similar to those reported in the literature. One dimension entitled anesthesia-related sequelae was new. The V values for the 32 items ranged from 0.80 to 0.97 (p < 0.01) and the mean value (V) of the questionnaire as a whole was 0.90 (p < 0.01). The H values ranged from 0.55 to 0.88 (p < 0.01) and the mean H value (H) of the questionnaire as a whole was 0.71 (p < 0.01). CONCLUSION: We have developed a valid and reliable pilot questionnaire to measure patient satisfaction with perioperative anesthetic care in Taiwan. The final version of the pilot questionnaire is a 32-item instrument with six dimensions, one of which, anesthesia-related sequelae, is new.

Adenylate cyclase inhibition attenuates neuropathic pain but lacks pre-emptive effects in rats.

PURPOSE: There is evidence that cyclic adenosine monophosphate (cAMP) transduction is involved in nociceptive processing. We previously showed that intrathecal injection of an adenylate cyclase inhibitor attenuated tactile allodynia caused by partial sciatic nerve ligation (PSNL) in rats. The present study investigates the pre-emptive effects of spinal cAMP transduction on nociceptive processing in a chronic neuropathic pain model. METHODS: Intrathecal catheterization and PSNL were performed in male Sprague-Dawley rats. Nociceptive responses to mechanical and thermal stimuli were evaluated at the hindpaw at 2 hr and at 3, 7, and 14 days after PSNL. The pre-emptive effects of the intrathecal adenylate cyclase inhibitor, SQ22536 (0.7 mumol x L(-1), 30 min before or after nerve ligation) were assessed. Also, the spatial and temporal expression profiles and immunoreactivity in the spinal cord of the cAMP response element binding protein (CREB) and its phosphorylated proteins (CREB-IR and p-CREB-IR) were analyzed. RESULTS: Compared with the rats treated with the vehicle, allodynia and hyperalgesia were significantly attenuated at 1-3 days by the intrathecal injection of SQ22536 performed either before or after ligation. The expression of CREB was significantly higher after ligation (P < 0.05), but differences were not observed between groups. Intrathecal injection of SQ22536, either before or after ligation, partially reduced p-CREB-IR protein expression in comparison with the vehicle control, especially after the first 3 days (P < 0.05). CONCLUSION: Our results show a possible association between the increase in p-CREB and PSNL-induced neuropathic pain. However, a pre-emptive effect of adenylate cyclase inhibitor administered before surgery was not observed.

Ultrasonic cardiac output monitor provides accurate measurement of cardiac output in recipients after liver transplantation.

BACKGROUND: The ultrasonic cardiac output monitor (USCOM; USCOM Pty. Ltd., Sydney, NSW, Australia) has been accepted as a noninvasive device for measuring cardiac function in various clinical conditions. The present study aimed at comparing the accuracy of this device with that of the thermodilution technique in recipients in the early postoperative period after liver transplantation. METHODS: Fifteen mechanically ventilated patients were studied on the first postoperative day after liver transplantation. We compared the left-sided and right-sided cardiac output (CO) determined by USCOM with that obtained from the thermodilution technique with a pulmonary artery catheter every 8 hours in the intensive care unit. Each patient received a total of four paired measurements. Bland-Altman analysis was used for bias and precision testing. The CO measured by USCOM and the thermodilution method were considered interchangeable if the limits of agreement lay within +/- 1 L per minute or 20% of the mean CO. RESULTS: Forty-eight paired left-sided CO measurements were obtained from 12 patients. Three patients were excluded due to unacceptable signals. Comparison of these two techniques revealed a bias of 0.13 L per minute and limits of agreement at -0.65 L and 0.92 L per minute. Fifty-six paired right-sided CO measurements were obtained from 14 patients with one patient excluded due to an unobtainable optimal signal. A bias of 0.11 L per minute with limits of agreement at -0.51 L and 0.72 L per minute were found for these two techniques. CONCLUSION: This is the first study to evaluate the accuracy of USCOM in the post-liver transplant setting. This device is accurate in measuring CO in liver transplant recipients postoperatively. Possible risks of arrhythmia, infection and pulmonary artery rupture can be avoided because of its noninvasive nature. USCOM should be considered as an alternative in hemodynamic monitoring after liver transplantation.

Inhibition of the cyclic adenosine monophosphate pathway attenuates neuropathic pain and reduces phosphorylation of cyclic adenosine monophosphate response element-binding in the spinal cord after partial sciatic nerve ligation in rats.

BACKGROUND: Recent reports have identified a role for cyclic adenosine monophosphate (cAMP) transduction in nociceptive processing. Spinal activation of the cAMP induced gene transcription through the activation of protein kinase A and cAMP response element-binding protein (CREB). Intrathecal injection of protein kinase A inhibitor reversed the mechanical hyperalgesia, whereas injection of CREB antisense attenuated tactile allodynia caused by partial sciatic nerve ligation (PSNL) in rats. In the present study, we aimed to assess the effects of spinal cAMP transduction on the nociceptive processing in a chronic neuropathic pain model. METHODS: PSNL was performed in male Sprague-Dawley rats 1 wk after intrathecal catheterization. Nociception to mechanical and thermal stimuli was assessed at the hindpaw 2 h, 3, 7, and 14 days after PSNL. The effects of adenylate cyclase inhibitor, SQ22536 (0.7 mumol, intrathecal) on these nociceptions were evaluated. Changes in the expression and immunoreactivity of CREB and its phosphorylated proteins (CREB-IR and pCREB-IR) in the dorsal horn of the spinal cord were also measured. RESULTS: The expression of CREB-IR and pCREB-IR proteins was shown to increase for 2 wk after PSNL. The increase in pCREB was partially reversed by the blockade of the cAMP pathway in the early 3 days, with a parallel increase in mechanical and thermal withdrawal thresholds. CONCLUSION: These results revealed the possible contribution of an increase in pCREB to the PSNL-induced tactile allodynia and thermal hyperalgesia. Modulation of the cAMP pathway may be clinically relevant if early intervention can be achieved in patients with chronic neuropathic pain.

Broken needle in the cervical spine: a previously unreported complication of Xiaozendao acupuncture therapy.

Xiaozendao (meaning "small-needle-knife," in Chinese) is a form of alternative medical instrument shaped like an acupuncture needle with a flat edge on the needle tip. It is widely used for the treatment of many different disorders in Asian countries, especially in the People's Republic of China. Its use has gained increasing popularity. To our knowledge, there are no reports of practitioners' experiences or adverse events related to "small-needle-knifed" therapy until now. We reported the first case of spinal-cord injury with delayed onset of neurologic symptoms from a broken small-needle-knife insertion into the spinal cord.

Evaluation of the longitudinal contraction of the ventricle septum in patients undergoing off-pump coronary artery bypass graft surgery by strain rate imaging.

BACKGROUND: Strain rate (SR) imaging is an emerging technique for assessing myocardial systolic and diastolic functions. This technique can provide assessment in real time and color mapping; it also can detect ischemia at its earlier stages in comparison with visual estimation of wall motion with other techniques. METHODS: This study group consisted of 9 patients undergoing elective coronary artery bypass graft (CABG) surgery. After general anesthesia with sevoflurane (end-tidal 1.8%) in air/oxygen mixture, a complete transesophageal echocardiography (TEE) study was performed with an ultrasound machine. Myocardial wall strain rate imaging was then preformed off-line using a customized computer software (Echopac, Windows 2000 version 2.1, General Electric) running on a Compaq P4 computer. The experimental protocol was divided into 6 parts: (1) T1: 30 minutes after general anesthesia completed, (2) T2: after opening the sternum and pericardium, (3) T3: left anterior descending coronary artery(LAD) snared for the preparation of ischemic pre-conditioning (SLAD), (4) T4: after anastomosing left internal mammary artery (LIMA) on LAD, (5) T5: before closing the sternum and pericardium and (6) T6: after closing the sternum and pericardium. RESULTS: From strain rate imaging, peak systolic SRs were reduced or inverted over LAD perfused area during the SLAD period. In apical segments, peak systolic SR changed from -0.45 +/- 0.48 to 0.42 +/- 0.63 (P < 0.05), whereas peak diastolic SR changed from 0.34 +/- 0.61 to -0.80 +/- 1.08 (P < 0.05). In the middle septum, peak systolic SR changed from -0.67 +/- 0.51 to -0.43 +/- 0.50 (P < 0.05), while peak diastolic SR changed from 0.47 +/- 0.44 to -0.64 +/- 0.84 (P < 0.05). After LIMA grafting, peak systolic SR changed from 0.42 +/- 0.63 to -0.61 +/- 0.40 (P < 0.05), as against peak diastolic SR which changed from -0.80 +/- 1.08 to 0.21 +/- 0.44 (P < 0.05) in the apical septum. Peak systolic SR changed from -0.43 +/- 0.50 to -0.75 +/- 0.46 (P < 0.05), whereas peak diastolic SR changed from -0.64 +/- 0.84 to 0.64 +/- 0.88 (P < 0.05) in the middle septum. CONCLUSIONS: Postsystolic shortening is a marker for both ischemia and successful myocardial reperfusion. By strain rate imaging, we could detect ischemia with a more sensitive and specific method. For anesthesiologists and surgeons, it can be an intraoperative tool for assessing ventricular function after reperfusion.

Difficult oral endotracheal intubation in an acromegalic patient receiving transsphenoidal surgery--a case report.

Patients suffering from acromegaly are associated with increased risks of difficult airway management. We report a case of acromegaly scheduled for transsphenoidal resection of pituitary adenoma under general anesthesia in whom all possible means failed us in the insertion of the endotracheal tube (ET) through the mouth, a procedure essential for transsphenoidal surgery. The operation was called off and for securing his compromised airway a nasal ET was placed under fiberoptic bronchoscopy. Five days later, awake oral fiberoptic intubation was successful under topical anesthesia. We suggest that oral endotracheal intubation performed awake under topical anesthesia with the aid of a fiberoptic bronchoscope is a choice approach in acromegalic patients with predicated difficult airway who are to receive surgery.

Propofol improves endothelial dysfunction and attenuates vascular superoxide production in septic rats.

OBJECTIVE: To determine the effects of propofol on vascular functions, plasma and endothelium-derived nitric oxide (EDNO), vascular NO, and cyclic guanosine monophosphate (cGMP), as well as vascular production of superoxide anion (O2*-), in septic animals. DESIGN: Prospective, multiexperimental, randomized, controlled studies. SETTING: University research laboratory. SUBJECTS: Male adult Sprague-Dawley rats weighing 350-400 g. INTERVENTIONS: Cecal ligation and puncture (CLP), with and without propofol (25 mg/kg/hr) infusion, after sham or CLP (24 hrs postsurgery). MEASUREMENTS AND MAIN RESULTS: Plasma NOx, basal aortic NOx, and cGMP concentrations all increased, whereas acetylcholine-induced endothelium-dependent relaxation (EDR), contractile response, and EDNO all decreased in CLP vs. sham rats (p < .001). Acetylcholine stimulated aortic NOx and cGMP significantly in sham and CLP-propofol (p < .01) but not CLP rats. Thus, propofol ameliorated the CLP-induced increases in plasma NOx, basal aortic NOx, and cGMP. It restored the CLP-induced impairment of EDR, EDNO, and acetylcholine-stimulated aortic NOx and cGMP levels. More O2*- production (measured by lucigenin-enhanced chemiluminescence) was noted in carotid arteries from CLP vs. sham rats (p < .001). Nicotinamide adenine dinucleotide (NADH; 1 mM) stimulated O2*- production in all rings, with significantly more increase in CLP vs. sham (p < .001). Propofol attenuated the excessive increase in O2*- production of CLP rings. CONCLUSIONS: Propofol treatment attenuated the overproduction of NO and O2*-, thus restoring the acetylcholine-responsive NO-cGMP pathway in CLP-induced sepsis. It also significantly improved the CLP-impaired EDR and EDNO in a parallel manner. These beneficial effects of propofol could be accounted for by improvement of the disturbed NO/O2*- balance in sepsis.

Myocardial infarction masked by high level spinal anesthesia in a patient undergoing herniorrhaphy.

Myocardial infarction (MI) is one of the leading causes of perioperative morbidity. Although evidence to prove significant reduction of perioperative MI with regional anesthesia is lacking, anesthesiologists still prefer this technique over general anesthesia for surgery involving the lower abdomen or lower extremities, especially in patients with cardiac risks. However, high level of sensory block during spinal anesthesia may obscure the referred pain from MI, which could contribute to the delay of diagnosis and treatment of an acute perioperative attack. We report a case of MI which occurred either intraoperatively or postoperatively, with symptoms that were masked by high level of sensory block to T4 by spinal anesthesia. This perioperative MI was only diagnosed when the patient recovered from anesthesia in the post-anesthesia care unit (PACU).

The effects of continuous axillary brachial plexus block with ropivacaine infusion on skin temperature and survival of crushed fingers after microsurgical replantation.

BACKGROUND: Continuous axillary brachial plexus block with local anesthetic has been shown to improve tissue perfusion after replantation surgery of the extremity. The present study aimed to investigate whether continuous axillary brachial plexus block with ropivacaine infusion can improve the survival of the reconstructive fingers secondary to an increase in its skin temperature in patients receiving replantation surgery of the crushed fingers. METHODS: Under general anesthesia, 18 patients received replantation or toe-to-hand transplantation of their crushed digits. They were randomly divided into two groups. Under ultrasound guidance, continuous axillary brachial plexus analgesia was effected by a loading dose of 10 ml 0.75% ropivacaine, followed by an infusion of 4-5 ml per hour for up to three days (Group A). Patients who did not receive continuous analgesia postoperatively served as a control (Group B). An infrared thermometer was used to hourly assess the skin temperature of the surgical and non-surgical sites in both groups for 24 h after the surgery. In addition, the survival (the rate of re-operation or amputation) of the reconstructive digits was also evaluated in both groups. RESULTS: The skin temperature of the digits (T1) on both groups did not show any significant difference at any point of time after the surgery albeit there was a trend of increased skin temperature on the reconstructive digits in patients receiving continuous axillary brachial plexus block (Group A) as compared to those without receiving the block (Group B). Also, the difference in skin temperature (dT) differed slightly at 0, 9 and 21 hours postoperatively in Group A in comparison with Group B (0.75 +/- 0.65 vs. -2.33 +/- 1.24, 0.53 +/- 0.34 vs. -3.02 +/- 1.27, -0.125 +/- 0.55 vs. -2.33 +/- 0.91, p < 0.05). However, no patients in both groups received a second operation or amputation of the graft. CONCLUSIONS: The result of this study demonstrated that axillary brachial plexus block with continuous infusion of 0.75% ropivacaine can increase the skin temperature, an index of tissue perfusion, of the reconstructive digits for 24 h after microvascular surgery of the crushed fingers. However, graft survival was good in both groups.

Efficacy of ultrasound-guided axillary brachial plexus block: a comparative study with nerve stimulator-guided method.

BACKGROUND: The aim of this study was to compare the efficacy of axillary brachial plexus block using an ultrasound-guided method with the nerve stimulator-guided method. We also compared the efficacy of ultrasound-guided single-injection with those of double-injection for the quality of the block. METHODS: Ninety patients scheduled for surgery of the forearm or hand were randomly allocated into three groups (n = 30 per group), i.e., nerve stimulator-guided and double-injection (ND) group, ultrasound-guided and double-injection (UD) group, and ultrasound-guided and single-injection (US) group. Each patient received 0.5 ml kg(-1) of 1.5% lidocaine with 5 mg kg(-1) epinephrine. Patients in the ND group received half the volume of lidocaine injected near the median and radial nerves after identification using a nerve stimulator. Patients in the UD group received half the volume of lidocaine injected around the lateral and medial aspects of the axillary artery, while those in the US group were given the entire volume near the lateral aspect of the axillary artery. The extent of the sensory blockade of the seven nerves and motor blockades of the four nerves were assessed 40 min after the performance of axillary brachial plexus block. RESULTS: Seventy percent of the patients in the ND and US groups as well as 73% of the patients in the UD group obtained satisfactory sensory and motor blockades. The success rate of performing the block was 90% in patients in the ND and UD groups and 70% in the US group. The incidence of adverse events was significantly higher in the ND group (20%) compared with that in the US group and the UD group (0%; p = 0.03). CONCLUSIONS: Ultrasound-guided axillary brachial plexus block, using either single- or double-injection technique, provided excellent sensory and motor blockades with fewer adverse events.

Propofol ensures a more stable A-line ARX index than thiopental during intubation.

BACKGROUND: The A-line autoregressive modelling with exogenous input index (AAI) is a new method of assessing depth of anesthesia. We examined the effects of tracheal intubation on the AAI and hemodynamics during induction of anesthesia with propofol compared with thiopental in patients aged over 50 yr. METHODS: 40 patients scheduled for a laminectomy, posterior spinal fusion, vertebroplasty, or total hip replacement, ASA physical status I or II and aged over 50 yr, were randomly divided into two groups. Thiopental 5 mg.kg(-1) iv, fentanyl 2.5 microg.kg(-1) iv, and rocuronium 0.7 mg.kg(-1) iv were used in the thiopental group (n = 20) for anesthetic induction; the same protocol was used in the propofol group (n = 20) except that 2 mg.kg(-1) propofol iv was given instead of thiopental. The AAI, non-invasive blood pressure, and heart rate were measured every minute before induction for three minutes, at 1.5 min post-induction, and then each minute post-intubation for eight minutes. RESULTS: The AAI increased significantly at one and two minutes after intubation in the thiopental group (to 56.5 +/- 18.6 at 1 min and 44.7 +/- 18.7 at 2 min after intubation vs 19.9 +/- 7.5 at 1.5 min after induction; P < 0.05). Thereafter, AAI values gradually decreased three minutes after intubation. The AAI was inhibited continuously after intubation in the propofol group, and no significant elevation was seen. CONCLUSION: Our results, using the AAI to monitor anesthetic depth during induction and tracheal intubation, suggest that at equipotent doses propofol provided a more stable level of anesthesia than did thiopental.