Preoperative versus intraoperative antiemetic strategies in patients undergoing laparoscopic cholecystectomy: A randomised double-blind study.

BACKGROUND: Previous studies have determined ondansetron's efficacy in preventing and treating postoperative nausea and vomiting (PONV). However, evidence regarding the timing of drug administration in relation to the surgical procedure remains vague. OBJECTIVE: To compare the preoperative and intraoperative administration of ondansetron on the incidence of PONV. DESIGN: Single-centred, randomised, double-blind trial. Patients were recruited between November 2018 and April 2021. Follow-up for PONV and retching was up to 24 h. SETTING: Aretaieio University Hospital, Greece. PATIENTS: A total of 121 patients undergoing elective laparoscopic cholecystectomy gave written consent. INTERVENTIONS: Patients were randomly allocated to the preoperative or the intraoperative group. The preoperative group received 4 mg of ondansetron dissolved in 100 ml of 0.9% saline 1 hour before induction of anaesthesia and 100 ml of 0.9% saline 30 min before end of surgery. The intraoperative group received 100 ml of 0.9% saline 1 h before induction of anaesthesia and 4 mg of ondansetron dissolved in 100 ml of 0.9% saline 30 min before end of surgery. MAIN OUTCOME MEASURES: The primary outcome was the incidence of nausea and/or vomiting combined at 24 h. RESULTS: No difference was found between the two groups regarding either the incidence of nausea and vomiting at 24 h (1.7% for the preoperative group versus 5.3% for the intraoperative group, P  = 0.31) or the incidence of nausea, vomiting and retching combined (5.3% for the preoperative group versus 10.5% for the intraoperative group, P  = 0.30). There was no difference between the groups in the pain intensity at rest or with coughing in the post anaesthesia care unit, at 4, 8 and 24 h postoperatively ( P  = 0.961, 0.929, 0.748 and 0.883 at rest, and 0.974, 0.220, 0.235 and 0.317 with coughing, respectively). CONCLUSION: Under the current study design, we found no difference in the incidence of PONV between the administration of ondansetron 1 h before induction of anaesthesia and the intraoperative administration of ondansetron 30 min before the end of surgery. TRIAL REGISTRATION: ClinicalTrials.gov NCT03023306.

The effect of type 2 diabetes mellitus on perioperative neurocognitive disorders in patients undergoing elective noncardiac surgery under general anesthesia. A prospective cohort study.

Background and Aims: Preliminary evidence suggests a possible relationship between type 2 diabetes mellitus (T2DM) and perioperative neurocognitive disorders (NCD). We sought to investigate whether patients with T2DM, undergoing elective noncardiac surgery under general anesthesia, are at increased risk of perioperative NCD. Material and Methods: A prospective cohort study was designed. One-hundred and forty-four patients with T2DM and 144 healthy controls were recruited. Controls were matched for sex, age, type of operation, and educational background. Postoperative delirium (POD), delayed neurocognitive recovery and postoperative NCD were evaluated. Results: Two hundred twenty-eight patients were analyzed. Compared to controls, patients with T2DM were diagnosed with higher rates of NCD preoperatively (n = 96 vs. n = 26, P < 0.05) and higher POD up to 4 days postoperatively (n = 204 vs. n = 68, P < 0.05). Increased rates of delayed neurocognitive recovery and postoperative NCD were recorded in patients with T2DM up to 9 months postoperatively (n = 473 vs. n = 192, P < 0.05). Insulin-dependent patients had higher rates of POD on the second (n = 38 vs. n = 24, P < 0.05) and third day (n = 27 vs. n = 16, P < 0.05) when compared to noninsulin-dependent patients. Logistic multivariable analysis revealed that patients with T2DM are at increased risk for postoperative cognitive disorders. Conclusion: Patients with type 2 diabetes mellitus appear to be at a higher risk of perioperative NCDs up to 9 months after elective noncardiac surgery under general anesthesia.

The impact of inhalation anesthetics on early postoperative cognitive function and recovery characteristics in Down syndrome patients: a randomized, double - blind study.

BACKGROUND: Down syndrome (DS) is associated with intellectual disability. DS patients may be unable to cooperate and often require general anesthesia even for minor surgeries. Rapid recovery significantly contributes to fast-tracking. This prospective randomized, double - blind study investigates the impact of desflurane and sevoflurane on recovery and early postoperative cognitive function of these patients. METHODS: Forty-four patients undergoing dental surgery, were randomized to receive desflurane (DES-group) or sevoflurane (SEVO-group) for anesthesia maintenance. The primary outcome was postoperative cognitive function (Prudhoe Cognitive Function Test, PCFT) at 90 min and 4 h postoperatively. Secondary outcome measures were the time between volatile discontinuation and spontaneous breath, eye opening, extubation, orientation and response to commands, time to achieve an Aldrete score ≥ 9 in the Post-anesthesia Care Unit and time to fulfill discharge criteria (Post Anesthetic Discharge Scoring System, PADSS). RESULTS: At 90 min, PCFT scores significantly decreased from baseline in both groups. Nevertheless, at 4 h, in DES-group there was no significant change from baseline (p = 0.163), while in SEVO-group the decrease remained significant (p < 0.001). Desflurane was also found superior regarding recovery characteristics, such as time to eye opening (p = 0.021), spatial orientation (p = 0.004), response to commands (p = 0.004). Discharge criteria were met earlier in DES-group (p = 0.018 for Aldrete score / p < 0.001 for PADSS). CONCLUSIONS: Desflurane was found superior to sevoflurane in terms of faster recovery and better preserved postoperative cognitive function in DS patients undergoing dental surgery. We suggest that desflurane, as part of a multimodal anesthetic approach, could be a useful agent to enhance early discharge from hospital of ambulatory patients with intellectual disability. TRIAL REGISTRATION: Registered with ClinicalTrials.gov ( NCT02971254 , principal investigator: E.G; November 2016).

Differences in Pain Perception Between Men and Women of Reproductive Age: A Laser-Evoked Potentials Study.

Objective: We investigated differences in pain perception between men and women of reproductive age by using Laser-Evoked Potentials (LEPs). Design, Setting, Subjects: Forty-four right-handed healthy volunteers (19 males/25 females), aged 30­40 years were studied. A CO2 laser generated three series of 10 thermal pulses (4.5 W) on the radial aspect of the dorsum of the left hand. A recording montage for late LEPs was used, and the potentials of each series of stimuli were averaged to calculate mean latency and amplitude for each subject. Volunteers scored verbally pain intensity (Numerical rating scale [NRS]; 0­10). Three series of 10 numbers were averaged for calculation of mean NRS score. Methods: LEP peak-to-peak amplitude, latency, and NRS scoring were compared between genders, and correlations between LEP amplitude/latency and NRS scores were assessed. Results: Data from 44 subjects were analyzed. LEP amplitudes differed significantly (P < 0.001) between men (24.2 ± 6.0 µV) and women (38.9 ± 15.28 µV), while no difference was found for latency (156.5 ± 8.6 versus 160.4 ± 19.8 ms, P = 0.42) or NRS score (2.6 ± 1.5 versus 2.4 ± 1.4, P = 0.63), respectively. Menstrual cycle phase did not influence LEP parameters (P = 0.59 for amplitude and P = 0.69 for latency) or NRS score (P = 0.95). No significant correlation was found between latency or amplitude and NRS score (P = 0.43 and P = 0.90, respectively). Conclusions: Our results demonstrate a significant gender-related difference in LEP amplitudes with lower mean values in men, while no difference was found in LEP latencies or in subjective pain ratings. Further research is required to clarify the clinical significance of the above experimental findings.

Sugammadex at both high and low doses does not affect the depth of anesthesia or hemodynamics: a randomized double blind trial.

Previous studies have shown that sugammadex decreases the anesthetic depth when administered to reverse the neuromuscular blockade produced by rocuronium/vecuronium. The aim of the present study was to investigate the effect of sugammadex alone on anesthetic depth and hemodynamics. Sixty patients scheduled for abdominal surgery participated in the study. Anesthesia was induced with thiopental/fentanyl and maintained with N2O/oxygen and sevoflurane concentrations adjusted to maintain Entropy and Bispectral Index (BIS) values between 40 and 50. Cis-atracurium 0.2 mg/kg was administered for neuromuscular blockade which was monitored with a TOF-Watch® SX acceleromyograph. State entropy (SE), response entropy (RE), Bispectral Index (BIS), systolic (SAP) and diastolic blood pressure (DAP), heart rate (HR), SpO2, end-tidal CO2 and sevoflurane concentrations were recorded every 3 min intraoperatively. Sugammadex 2 mg/kg (Group-2), 4 mg/kg (Group-4) or 16 mg/kg (Group-16) was given intravenously when a count of two responses of the train-of-four (TOF) or a post-tetanic count (PTC) 1-3 appeared or when no response at all (PTC = 0) was observed, respectively. The overall SE values, thus the primary outcome of the study, were 44 ± 11, 43 ± 10 and 43 ± 11 for Group-2, Group-4 and Group-16, respectively (p = 0.812). Also, the secondary endpoints, namely RE, BIS, SAP and DAP, HR and SpO2 did not differ between the three groups. Comparisons between Group-2 versus Group-4, Group-2 versus Group-16 and Group-4 versus Group-16 showed no differences (p > 0.05) for all the studied variables. Sugammadex alone at low, medium or high clinical doses has no effect on anesthetic depth as assessed by Entropy and BIS or on hemodynamics.

Undiagnosed vertebral hemangioma causing a lumbar compression fracture and epidural hematoma in a parturient undergoing vaginal delivery under epidural analgesia: a case report.

INTRODUCTION: Vertebral hemangiomas are benign vascular tumours of the bony spine which are usually asymptomatic. Pregnancy-related anatomical and hormonal changes may lead to expansion of hemangiomas and development of neurological symptoms. We present an unusual case of vertebral fracture due to an undiagnosed hemangioma presenting as postpartum back pain following epidural analgesia. CASE PRESENTATION: A multiparous female with an unremarkable history developed intense lumbar pain after vaginal delivery under epidural analgesia. The pain was attributed to tissue trauma associated with the epidural technique. The patient had no clinical improvement with analgesics, and her symptoms deteriorated over the following days. A magnetic resonance imaging scan revealed an acute fracture of the second lumbar vertebra (L2) with epidural extension and mild compression of the dural sac, suggesting hemangioma as the underlying cause. The patient underwent successful spinal surgery with pedicle screw fixation to stabilize the fracture. CONCLUSION: Vertebral fractures secondary to acute expansion of a vertebral hemangioma rarely occur during vaginal delivery. In such cases, the labour epidural technique and analgesia may challenge the physician in making the diagnosis. Postpartum severe back pain should be thoroughly investigated even in the absence of neurological deficits, and osseous spinal pathology should be considered in the differential diagnosis.

Pretreatment with nitrous oxide enhances induction of anesthesia with sevoflurane: A randomized controlled trial.

BACKGROUND AND AIMS: Inhalation anesthesia with sevoflurane may be enhanced by several drugs or techniques. The aim of the present study was to investigate the effect of nitrous oxide (N2O) pretreatment on the speed of anesthesia induction with sevoflurane. MATERIAL AND METHODS: Eighty patients scheduled for hysteroscopy under general anesthesia were randomly assigned to inhale for 10 min before induction 50% N2O in oxygen or air via a facemask. Anesthesia was induced with 7-8% sevoflurane in oxygen via a facemask. Bispectral index (BIS), end-tidal carbon dioxide (EtCO2) tidal volume, respiratory rate, oxygen saturation (SpO2), and heart rate were recorded every minute during the 10 min pretreatment periods and every 30 s during the first 300 s of induction with sevoflurane. During induction of anesthesia inspired and end-tidal sevoflurane concentrations were also recorded. RESULTS: During the 10 min of inspired 50% N2O or air BIS, EtCO2, tidal volume, respiratory rate and heart rate values did not differ between the two groups except for the SpO2, which was higher in the N2O group (P < 0.001). During induction of anesthesia the N2O group exhibited lower BIS values (P = 0.001), being significant at 60-150 s (P < 0.001, P < 0.001, P = 0.002, P = 0.014) as well as at 270 s (P = 0.004). EtCO2 and tidal volume were consistently lower in the N2O group (P = 0.001, P = 0.041 respectively) and respiratory rate was higher (P = 0.007). CONCLUSION: Our results show that pretreatment of the patients with 50% N2O for 10 min enhances the speed of induction with sevoflurane as assessed by the BIS monitoring.

Regional anesthesia practice in Greece: A census report.

BACKGROUND AND AIMS: Regional anesthesia (RA) techniques (central neuraxial and peripheral nerve blocks [CNBs and PNBs]) are well-established anesthesia/analgesia modalities. However, information on their nationwide use is sparse. The aim of the survey was to assess the utility of RA techniques in Greece, during 2011. MATERIALS AND METHODS: A nationwide, cross-sectional descriptive survey was conducted (March to June, 2012), using a structured questionnaire that was sent to 128 Greek Anesthesia Departments. RESULTS: Sixty-six completed questionnaires (response rate 51.56%) were analyzed. The data corresponded to 187,703 operations and represented all hospital categories and geographical regions of Greece. On the whole, RA was used in 45.5% of performed surgical procedures (85,386/187,703). Spinal anesthesia was the technique of choice (51.9% of all RA techniques), mostly preferred in orthopedics (44.8%). Epidural anesthesia/analgesia (application rate of 23.2%), was mostly used in obstetrics and gynecology (50.4%). Combined spinal-epidural and PNBs were less commonly instituted (11.24% and 13.64% of all RA techniques, respectively). Most PNBs (78.5%) were performed with a neurostimulator, while elicitation of paresthesia was used in 16% of the cases. Conversely, ultrasound guidance was quite limited (5%). The vast majority of consultant anesthesologists (94.49%) were familiar with CNBs, whereas only 46.4% were familiar with PNBs. The main reported limitations to RA application were lack of equipment (58.23%) and inadequate education/training (49.29%). CONCLUSION: Regional modalities were routinely used by Greek anesthesiologists during 2011. Neuraxial blocks, especially spinal anesthesia, were preferred over PNBs. The underutilization of certain RA techniques was attributed to lack of equipment and inadequate training.

Postoperative pain after major abdominal surgery: is it gender related? An observational prospective study.

OBJECTIVES: Gender may be associated with postoperative pain. This study aimed to assess pain intensity and postoperative analgesic requirements in female and male patients scheduled for major abdominal surgery. METHODS: Sixty-five patients, 31 men and 34 women, scheduled for major abdominal surgery were recruited. Anesthesia and intraoperative analgesics were standardized in all patients. Postoperatively, all patients had access to a 60 mL PCA pump containing 1 mg/mL morphine and 50 µg/mL droperidol. Morphine consumption and VAS scores at rest and after cough were recorded 2, 4, 8, 24, and 48 hours postoperatively. RESULTS: Of the 65 patients recruited for the study, 30 women and 30 men aged 65 ± 8.9 and 66 ± 9.0 years, respectively, were included in the analysis. Morphine consumption was examined 2, 4, 8, 24, and 48 hours after surgery and did not differ in women vs. men (mean ± standard deviation, 4.4 ± 3.2 vs. 5 ± 4.8, 7.2 ± 4.8 vs. 8.7 ± 6.9, 10.4 ± 7.1, vs. 12.5 ± 8.5, 22.9 ± 11.6 vs. 25.6 ± 14.5, and 36.2 ± 15.7 vs. 39.7 ± 21.7 mg, P = 0.384). Cumulative morphine consumption was not significantly different in women vs. men when normalized for body mass index (mean ± standard deviation, 0.17 ± 0.13, 0.28 ± 0.20, 0.40 ± 0.30, 0.88 ± 0.46, and 1.38 ± 0.59 mg/kg(/) m(2) in women and 0.18 ± 0.18, 0.31 ± 0.25, 0.46 ± 0.32, 0.95 ± 0.54, and 1.47 ± 0.81 mg/kg/m(2) in men at 2, 4, 8, 24, and 48 hours postoperatively (P = 0.567). Both genders exhibited similar VAS pain scores (mm) at rest and after cough (P = 0.476, P = 0.378, respectively). CONCLUSIONS: Postoperative morphine requirements did not differ between female and male patients undergoing major abdominal surgery. Pain intensity reported at rest and after cough did not differ between the 2 groups.

The efficacy of 5HT3-receptor antagonists in postoperative nausea and vomiting: the role of pharmacogenetics.

INTRODUCTION: Genetic variants may affect drug efficacy on postoperative nausea and vomiting (PONV). The understanding of these mechanisms will help to identify the surgical patients who might benefit from specific prophylactic and therapeutic antiemetic treatment. The aim of the present review was to investigate gene polymorphisms that influence 5-hydroxytryptamine (serotonin) type 3 receptor antagonists (5HT3RA) efficacy in PONV. EVIDENCE AQUISITION: We included articles published from 2005 to 2022, utilizing the electronic databases PUBMED, EMBASE, COHRANE Library and ScienceDirect. To explore the relationship between genetic variations and 5HT3 receptor antagonist efficacy in PONV we focused on three different gene polymorphisms: the cytochrome P450 mono-oxygenase system gene (CYP2D6), the adenosine triphosphate (ATP)-binding cassette subfamily B gene (ABCB1) as well as the 5HT3 receptor gene (5HT3R). We also explored the relationship between the above genetic variations and their impact on 5HT3RA efficacy in the context of chemotherapy induced nausea and vomiting. EVIDENCE SYNTHESIS: Our search retrieved a total of 70 articles; 29 of them were included in the present review. Regarding polymorphisms of the CYP2D6 gene and the efficacy of serotonin antagonists in PONV, the ultra-rapid metabolizer genotype was associated with reduced efficacy of ondansetron, dolasetron and tropisetron, with the latter presenting more pronounced failure in these patients, while granisetron's efficacy remained unaffected. Regarding variations in the ABCB1 gene, three polymorphisms ("2677G>T/A" in exon 21; "3435C>T" in exon 27; "C1236T" in exon 12) were associated with a better response to ondansetron and ramosetron, while they did not affect palonosetron's efficacy. Additionally, polymporphisms of the 5-HT3B receptor gene were associated with ondancetron's postoperative efficacy; the "100_-102AAG" deletion variant was associated with reduced efficacy, while the Y129S variant did not show any effect on the drug's antiemetic effect. CONCLUSIONS: This review highlights that inefficacy of a specific drug in managing PONV could be attributed to specific genetic profiles and patients would possibly benefit from a drug switch.

The impact of 30 ml/kg hydroxyethyl starch 130/0.4 vs hydroxyethyl starch 130/0.42 on coagulation in patients undergoing abdominal surgery.

BACKGROUND & OBJECTIVES: Hydroxyethyl starches (HES) 130/0.4 (Voluven;) and 130/0.42 (Venofundin;) impair coagulation less than older HES solutions with higher molecular weight and molar substitution. Thus, these may be used in high doses up to 50 ml/kg/day. The aim of this study was to investigate and compare the effects of HES 130/0.4 versus HES 130/0.42 on coagulation after the intraoperative infusion of 30 ml/kg in patients undergoing major abdominal surgery. METHODS: Fifty two patients scheduled for elective major abdominal surgery were randomized to receive 30 ml/kg of HES 130/0.4 or HES 130/0.42 intraoperatively. Coagulation variables were assessed before and after infusion of the colloid solution using thrombelastography. RESULTS: Data from 49 patients, 25 patients in the HES 130/0.4 and 24 in the HES 130/0.42 group, were analyzed. Measurements of reaction time, kinetic time, α-angle, maximum amplitude and coagulation index before and after colloid infusion did not differ between the groups. Within each group, after colloid infusion, reaction time did not change significantly, while α-angle, maximum amplitude and coagulation index values were significantly decreased (P <0.01, P<0.001 and P<0.001, respectively in HES 130/0.4 group and P<0.01, P<0.001 and P<0.01, respectively in HES 130/0.42 group). Kinetic time was significantly increased (P<0.001) in both the groups. In both groups, all thrombelastographic measurements after colloid infusion were found within normal limits. INTERPRETATION & CONCLUSIONS: HES 130/0.4 and HES 130/0.42 showed similar, not clinically significant effects on coagulation, as assessed by thrombelastography, when a dose of 30 ml/kg was administered in patients undergoing major abdominal surgery.

Perioperative Dexmedetomidine or Lidocaine Infusion for the Prevention of Chronic Postoperative and Neuropathic Pain After Gynecological Surgery: A Randomized, Placebo-Controlled, Double-Blind Study.

INTRODUCTION: The transition of acute to chronic postoperative pain (CPP) remains a significant burden to the rehabilitation of patients. The research for adjuvants to prevent CPP continues; among others, dexmedetomidine and lidocaine seem promising agents. METHODS: This is a long-term follow-up of a randomized, placebo-controlled, double-blind study on women who underwent open abdominal gynecological surgery and received dexmedetomidine or lidocaine or placebo infusion perioperatively (n = 81). The effect of these adjuvants on the development of CPP and neuropathic pain was assessed during a 12-month follow-up. Eighty-one (81) women ASA I-II, aged between 30 and 70 years, were randomly assigned to receive either dexmedetomidine (DEX group) or lidocaine (LIDO group) or placebo (CONTROL group) perioperatively. Before anesthesia induction, all patients received a loading intravenous dose of either 0.6 µg/kg dexmedetomidine or 1.5 mg/kg lidocaine or placebo, followed by 0.6 µg/kg/h dexmedetomidine or 1.5 mg/kg/h lidocaine or placebo until last suture. Patients were followed up to obtain the long-term outcomes at 3, 6, and 12 months. At these time-points, pain intensity was assessed with the Numerical Rating Scale, (NRS: 0-10) and the development of neuropathic elements with the Douleur Neuropathique 4 (DN4) score. Prognostic parameters that could affect chronic pain and its components were also identified. RESULTS: Data from 74 women were analyzed. Dexmedetomidine significantly reduced NRS scores comparing to placebo at 3 months (p = 0.018), while at 6 months, lidocaine was found superior to placebo (p = 0.02), but not to dexmedetomidine, in preventing neuropathic pain (DN4 < 4). Regarding secondary endpoints, higher NRS cough scores at 48 h were associated with statistically significant NRS and DN4 scores at 3, 6, and 12 months (p < 0.02). At 6 months, a statistically significant correlation was also found between higher NRS values and older age (p = 0.020). CONCLUSIONS: Dexmedetomidine was superior to placebo regarding the duration and severity of CPP, while lidocaine exhibited a protective effect against neuropathic elements of CPP. TRIAL REGISTRATION: ClinicalTrials.gov identifier, NCT03363425.

Prevalence of postpartum depression and antenatal anxiety symptoms during COVID-19 pandemic: An observational prospective cohort study in Greece.

INTRODUCTION: A significant proportion of pregnant women and women in the early postpartum period suffer from mental health problems. The COVID-19 pandemic represents a unique stressor during this period and many studies across the world have shown elevated rates of postpartum depression (PPD). METHODS: In this multicenter two-phase observational prospective cohort study, we aim to assess the prevalence of anxiety prior to labor (Generalized Anxiety Disorder-7), as well as PPD at 6-8 weeks postpartum using the Edinburgh Postnatal Depression Scale (EPDS). RESULTS: Of the 330 women analyzed, 13.2% reported symptoms of depression using EPDS cut-off score ≥13. High antenatal levels of anxiety (24.8% scored ≥10 in GAD-7) were documented. A significant proportion of postpartum women reported a decrease in willingness to attend antenatal education courses (36%) and fewer antenatal visits to their obstetrician (34%) due to pandemic. Higher antenatal anxiety increased the odds of being depressed at 6-8 weeks postpartum (EPDS ≥13). CONCLUSIONS: Compared to reported prevalence of PPD from previous studies before the COVID-19 era in Greece, we did not find elevated rates during the first wave of the pandemic. High anxiety levels were observed indicating that there is a need for close monitoring in pregnancy during the pandemic and anxiety screening to identify women who need support in the pandemic era. A well-planned maternity program should be employed by all the associated care providers to maintain the proper antenatal care adjusted to the pandemic strains as well as a follow-up after labor.

Impact of graded hypothermia on coagulation and fibrinolysis.

BACKGROUND: Hypothermia has a detrimental effect on hemostatic mechanism. The purpose of this experimental study was to investigate the effect of graded hypothermia on markers of the anticoagulant system (antithrombin III and protein C) and fibrinolytic system (plasminogen, α(2)-antiplasmin), and on vascular wall and other tissue specimens. MATERIALS AND METHODS: Ten New Zealand rabbits were subjected to mild and then moderate core hypothermia of 32 °C for 60 min. Blood samples were obtained at normothermic (T(1)), mild (T(2)), and moderate (T(3)) hypothermic conditions. Chromogenic assay methods were used to determine quantitatively (%) the activity of antithrombin III, protein C, plasminogen, and α(2)-antiplasmin. Hypothermic values were compared with the normothermic values. Tissue and vessel wall specimens were examined under light microscope. RESULTS: Reduction of activity (%) from normothermia (T(1)) to mild (T(2)) and moderate (T(3)) hypothermia was found for antithrombin III (103.40 ± 12.54, 87.40 ± 13.50, and 82.70 ± 20.78, respectively, with statistically significant difference between T(1)-T(3): P = 0.03), for protein C (70.1 ± 7.51, 56.30 ± 8.34, and 53.1 ± 7.34, with statistically significant difference between T(1)-T(2) and T(1)-T(3): P = 0.015 for both comparisons) and α(2)-antiplasmin (97 ± 9.63, 80.60 ± 11.73, and 83.70 ± 13.94, with statistically significant difference between T(1)-T(2): P = 0.006). Plasminogen activity was increased (14.50 ± 0.52, 16.30 ± 1.63, and 17.30 ± 2.45, with statistically significant difference between T(1)-T(2) and T(1)-T(3): P = 0.033 for both comparisons). Histologic examination revealed no significant lesions on tissue and vessel wall specimens. CONCLUSIONS: The results of our study suggest that even though the hypothermia period was relatively short, the processes of coagulation and fibrinolysis were altered with simultaneous changes.

Effects of Intravenous Dexmedetomidine Versus Lidocaine on Postoperative Pain, Analgesic Consumption and Functional Recovery After Abdominal Gynecological Surgery: A Randomized Placebo-controlled Double Blind Study.

BACKGROUND: The management of acute postoperative pain remains challenging, and the search for adjuvants to reduce opioid use continues. OBJECTIVES: We studied the effect of intravenous dexmedetomidine and lidocaine on postoperative pain, opioid consumption, and functional recovery. STUDY DESIGN: A randomized controlled trial was performed. SETTING: The trial was conducted at Aretaieio University Hospital, Athens, Greece. METHODS: In this double-blind study, 91 women, 30-70 years old, with an American Society of Anesthesiologists Physical Status of I or II, scheduled for abdominal hysterectomy or myomectomy, were randomized to receive either dexmedetomidine (DEX group), lidocaine (LIDO group), or placebo (CONTROL group). Before anesthesia induction, a loading intravenous dose of one of the aforementioned drugs was given to all patients (0.9mL/kg/h for 10 minutes), followed by 0.15mL/kg/h infusion until the last suture. Identical 50 mL syringes containing dexmedetomidine 4 mg/mL (bolus: 0.6 µg/kg, infusion: 0.6 µg/kg/h), or lidocaine 10 mg/mL (bolus: 1.5 mg/kg, infusion: 1.5 mg/kg/ h), or NaCl 0.9% were used. The main outcomes were cumulative morphine consumption and postoperative pain at rest and cough (Numeric Rating Scale, [NRS]: 0-10). Other measurements included anesthetic (sevoflurane) consumption, nausea/vomiting, postoperative sedation, time to first passage of flatus/stool, mobilization, sleep quality, satisfaction, discharge time, and drug side effects. Measurements were performed at Post-anesthesia Care Unit (PACU), 2 hours, 4 hours, 8 hours, 24 hours, and 48 hours. RESULTS: Data from 81 patients were analyzed (DEX group:26, LIDO group:29, CONTROL group:26). Cumulative morphine consumption (mg) was significantly lower in the LIDO group versus the CONTROL group in the PACU (LIDO group: 8.41 ± 1.45, CONTROL group: 10.4 ± 3.29, P = 0.017); at 24 hours (LIDO group: 16.86 ± 5.85, CONTROL group: 23.4 ± 9.54, P = 0.036); and 48 hours (LIDO group: 20.45 ± 6.58, CONTROL group: 28.87 ± 12.55, P = 0.022). The DEX group experienced significantly less nausea compared to the CONTROL group in the PACU (P = 0.041). Finally, the use of vasoconstrictors was higher in the treatment groups, especially in the DEX group compared to the CONTROL group (P = 0.012). The rest of the measurements regarding NRS scores, sevoflurane consumption, bowel function, and other recovery characteristics, satisfaction, discharge time, and drug side effects did not differ significantly among the groups. LIMITATIONS: Different doses of the studied medications were not assessed, drugs were administered only pre- and intraoperatively, and pain was not managed according to the World Health Organization (WHO) pain relief ladder. However, all patients were adequately covered with patient-controlled anesthesia morphine and acetaminophen; parecoxib (not approved for use in the United States) was preserved as a rescue analgesic. CONCLUSIONS: Dexmedetomidine and lidocaine could be useful adjuvants for analgesia after abdominal surgery. Lidocaine significantly reduced postoperative opioid consumption, while dexmedetomidine prevented early postoperative nausea. However, hypotension and the need for vasopressors was common with both agents, especially with dexmedetomidine.

Uneventful epidural catheter removal in a patient with postoperative acute coronary syndrome receiving emergency triple antithrombotic therapy: a case report.

BACKGROUND AND OBJECTIVES: Neuraxial hematoma is a rare complication of the epidural technique which is commonly used for high quality postoperative pain relief. In case of urgent initiation of multiple antithrombotic therapy, the optimal timing of epidural catheter removal and need for treatment modification may be quite challenging. There are no specific guidelines and published reports are scarce. CASE REPORT: We present the uneventful removal of an indwelling epidural catheter in a patient who was put on emergency triple antithrombotic treatment with Low Molecular Weight Heparin (LMWH), aspirin and clopidogrel in the immediate postoperative period, due to acute coronary syndrome. In order to define the optimal conditions and timing for catheter removal, so as to reduce the risk of complications, various laboratory tests were conducted 3 hours after aspirin/clopidogrel intake. Standard coagulation tests revealed normal platelet count, normal prothrombin time and normal activated partial thromboplastin time, while Platelet Function Analysis (PFA-200) revealed abnormal values (increased COL/EPI and COL/ADP values, both indicating inhibition of platelet function). The anti-Xa level, estimated 4 hours after LMWH administration, was within therapeutic range. At the same time, Rotational Thromboelastometry (ROTEM) showed a relatively satisfactory coagulation status overall. The epidural catheter was removed 26 hours after the last dual antiplatelet dose and the next dose was given 2 hours after removal. Enoxaparin was withheld for 24 hours and was resumed after 6 hours. Neurologic checks were performed regularly for alarming signs and symptoms suggesting development of an epidural hematoma. No complications occurred. CONCLUSION: Point-of-care coagulation and platelet function monitoring may provide a helpful guidance in order to define the optimal timing for catheter removal, so as to reduce the risk of complications. A case-specific management plan based on a multidisciplinary approach is also important.

Impact of Altmetrics in evaluation of scientific journals, research outputs and scientists' careers: Views of editors of high impact anaesthesia, critical care and pain medicine journals.

BACKGROUND AND AIMS: Altmetrics represent the attention of an article drawn from social and mainstream media. The aim of this survey was to investigate the views of editors of high-impact journals on the Altmetric Attention Score (AAS), the number derived from an automated algorithm including a weighted count of mainstream news and social media sources. METHODS: A questionnaire related to the AAS was sent to the editors of high-impact journals, namely Anaesthesia, Critical Care Medicine (CCM) and Pain Medicine (PM). Eleven questions were related to the possible benefits and flaws of Altmetrics. RESULTS: Of the 1,381 editors asked, 126 answered. The overall answers showed that 76% of the editors were familiar with Altmetrics, 28% knew how AAS is calculated, 12% believed that AAS should replace traditional bibliometrics, 34% favoured AAS for journal ranking, 40% believed that AAS should be used to assess an article, 44% felt that AAS should be included in researchers' curriculum vitae and 22% felt that it should be considered for grants. Sixty-two percent of editors believed that AAS is vulnerable to manipulations, 60% proposed improvement and 16% abandonment. Positive answers were similar across the fields, except for journal ranking. Fifty-four percent of editors of the CCM journals favoured journal ranking using AAS versus 28% and 26% editors of anaesthesia and PM journals (P = 0.025 and P = 0.006, respectively). CONCLUSION: A high percentage of editors believed that AAS should be used to assess scholarly output and that it should be included in the researchers' curriculum vitae. Sixty percent of responders supported the improvement of AAS.

The Role of Dexmedetomidine as an Additive to Intravenous Regional Anesthesia: A Systematic Review and Meta-analysis.

BACKGROUND: Intravenous Regional Anesthesia (IVRA) is a reliable and cost-effective anesthetic method for minor surgical procedures to the extremities. Limitations of this block include tourniquet discomfort, short duration of anesthesia, and absence of postoperative analgesia. Dexmedetomidine has been used as an adjuvant to minimize these negative characteristics with inconclusive results. AIM: To perform a systematic review of the existing evidence on the role of dexmedetomidine as an additive to intravenous regional anesthesia in upper limb surgery. STUDY DESIGN: Systematic Review and Meta-analysis. METHODS: The databases searched were MEDLINE, Embase, PubMed, CINAHL, Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials databases, and clinicaltrials. gov (1990-2019). Seven randomized controlled trials (RCTs) were included. We analyzed the duration of analgesia, onset time of sensory and motor block, intraoperative tourniquet pain scores, the incidence of tourniquet pain, need for rescue analgesia, intraoperative rescue analgesia consumption, sedation scores, postoperative pain scores, and anesthesia quality. RESULTS: Intraoperative analgesia duration (MD 11.08 min; 95% CI 5.42, 16.75; P < .0001) was longer and sensory block onset time (MD -2.10 min; 95% CI -3.345, -0.86; P = .00009) was shorter in the dexmedetomidine group. Anesthesia quality scores (MD 0.58; 95% CI 0.47, 0.70; P < .00001) and postoperative sedation scores (MD 1.03; 95% CI 0.88, 1.24; P < .00001) were significantly higher. There was a significant reduction in intraoperative rescue analgesia consumption (MD -19.70 mg; 95% CI -24.15, -15.26; P < .00001) in the dexmedetomidine group. The risk of tourniquet pain as well as postoperative pain scores were lower in favor of dexmedetomidine. The addition of dexmedetomidine to IVRA slightly increased the risk of sedation. A limitation of our study is that some of the interesting outcomes derive from a small number of RCTs. CONCLUSION: The addition of dexmedetomidine to IVRA ameliorates the block's characteristics and carries a low risk of potential side effects.

Acute and Chronic Pain after Cesarean Delivery under Subarachnoid Anaesthesia. Is Postoperative Analgesia Adequate? A Cohort Observational Study.

Objectives: Uncontrolled pain after cesarean delivery is associated with women's dissatisfaction and limited ability to take care of the neonate. Materials and methods:This prospective observational study included 173 women scheduled for elective cesarean delivery under spinal anesthesia. Postoperative analgesia included subcutaneous morphine 0.1 mg/kg in the post-anesthesia care unit, followed by intravenous paracetamol 1000 mg every eight hours and intravenous diclofenac 75 mg every 12 hours in the ward. Subcutaneous morphine was repeated on demand. Pain intensity at rest, pain intensity after movement and cumulative morphine consumption were recorded at 2, 4, 8, and 24 hours postoperatively. Acute pain intensity was assessed on a 100 mm visual analogue scale (VAS, score 0-100 mm). Three and six months postoperatively, women were interviewed by phone for the presence of persisting pain, abnormal sensation in the wound area and analgesic consumption. Results:Our results showed that 24 hours postoperatively the mean dose of morphine was 16±7.1 mg and VAS scores at rest and after movement were 23±17.3 mm and 40±20.9 mm, respectively. The mean VAS scores at rest remained below 31 mm at all times, while after movement they were over 40 mm at both four and eight hours postoperatively (45±23.8 mm and 43±23.2 mm, respectively). Three months postoperatively, 15% of women reported the presence of continuous or intermittent pain, 72% loss of sensation or numbness at the site of surgery and 32% occasional analgesic consumption at home. Six months after surgery, 5% of women reported pain, 44% loss of sensation or numbness in the wound area and none of them (0%) consumed analgesics due to persistent post-cesarean delivery pain. Conclusion:Based on the above-mentioned findings, we concluded that the amount of morphine consumed in the ward was low and possibly inadequate to alleviate early post-cesarean delivery pain. The overall incidence of persisting pain was low and consistent with previous studies.