Combination Of Dexmedetomidine Research Articles

A prospective, randomized, single-blinded study comparing the efficacy and safety of dexmedetomidine and propofol for sedation during endoscopic retrograde cholangiopancreatography

BackgroundBalanced propofol sedation is extensively used in endoscopic retrograde cholangiopancreatography (ERCP), but sedation-related adverse events (SRAEs) are common. In various clinical settings, the combination of dexmedetomidine with opioids and benzodiazepines has provided effective sedation with increased safety. The aim of this investigation was to compare the efficacy and safety of dexmedetomidine and propofol for sedation during ERCP.MethodsForty-one patients were randomly divided into two groups: the dexmedetomidine (DEX) group and the propofol (PRO) group. Patients in the DEX group received an additional bolus of 0.6 μg kg−1 dexmedetomidine followed by a dexmedetomidine infusion at 1.2 μg kg−1 h−1, whereas the PRO group received 1–2 mg kg−1 of propofol bolus followed by a propofol infusion at 2–3 mg kg−1 h−1. During ERCP, the primary outcome was the incidence of hypoxemia (SpO2 < 90% for > 10 s). Other intraoperative adverse events were also recorded as secondary outcomes, including respiratory depression (respiratory rate of < 10 bpm min−1), hypotension (MAP < 65 mmHg), and bradycardia (HR < 45 beats min−1).ResultsThe incidence of hypoxemia was significantly reduced in the DEX group compared to the PRO group (0% versus 28.6%, respectively; P = 0.032). Patients in the PRO group exhibited respiratory depression more frequently than patients in the DEX group (35% versus 81%, respectively; P = 0.003). There were no significant differences in terms of hypotension and bradycardia episodes between groups. During the procedures, the satisfaction scores of endoscopists and patients, as well as the pain and procedure memory scores of patients were comparable between groups.ConclusionIn comparison with propofol, dexmedetomidine provided adequate sedation safety with no adverse effects on sedation efficacy during ERCP.Trial registrationChinese Clinical Trial Registry, ChiCTR2200061468, 25/06/2022.

Clinical and Hematological Effect of Constant Rate Infusion of Ketamine Alone and Ketamine-dexmedetomidine Combination on Isoflurane Anesthesia in Horses

Background: Anaesthetic management of horses for a successful surgery is of utmost importance but a risky procedure than other companion animals. Peri-aneasthetic morbidity and mortality in horses could be alarming if proper combinations of drugs were not used. Balanced anaesthetic combinations are being explored by various authors to find safer combinations.Therefore current study was planned to evaluate the effect of CRI of ketamine alone and ketamine-dexmedetomidine combination for isoflurane anesthesia in horses. Methods: Twenty four clinical cases of horses were randomly divided into three groups S, D and DK, having eight animals in each. Xylazine (1 mg/kg) and butorphanol (0.05 mg/kg) were given intravenously for premedication and ketamine (2 mg/kg) and midazolam (0.2 mg/kg) were used for induction of anesthesia. Normal saline (1000 ml/hour), ketamine alone (2 mg/kg/hr), ketamine (2 mg/kg/hr) and dexmedetomidine (2 µg/kg/hr) combination were given as CRI in groups S, K and KD, respectively. Thiopentone sodium (200 mg bolus, 5%) was given as fast intravenous to facilitate endotracheal intubation in some of the cases. Anesthesia was maintained with isoflurane in oxygen and anesthetic efficacy was evaluated based on clinical and haematological parameters. Result: Overall quality of sedation, muscle relaxation, response to surgical stimuli, quality of intubation, anesthetic depth and quality of recovery was significantly (p less than 0.05) better in group KD. Down-time (min) and duration of anesthesia were non significantly less in group KD. CRI of ketamine and dexmedetomidine combination was having significant (p less than 0.05) thiopentone sodium and isoflurane sparing effect. Heart rateand RR, did not show any significant variation among groups but rectal temperature was significantly low in KD group than groups S and K. CRI of ketamine-Dexmedetomidine combination produced a better quality of anesthesia and significant thiopentone sodium and isoflurane sparing effect thus was found suitable for anesthesia of horses.

Monitored anesthesia care: Dexmedetomidine-ketamine versus dexmedetomidine-propofol combination during burr-hole surgery for chronic subdural hematoma: A randomized trial

Background and Aim: Selecting the ideal drug combination for effective monitored anesthesia care to keep patients comfortable and safe during evacuation of chronic subdural hematoma is a challenge. Our hypothesis was that the combination of dexmedetomidine with ketamine might provide safer monitored anesthesia care keeping airway patency and stable hemodynamics in comparison to dexmedetomidine-propofol combination during burr-hole surgery for evacuating chronic subdural hematoma in high-risk patients.Methods: A total of 56 paticipants were allocated into two groups in this randomized prospective double-blind study by a computer-generated randomization table. DK group (n = 28): Patients were given a mix of ketamine (1 mg/kg) and dexmedetomidine (1 µg/kg) diluted in 10 ml of saline solution infused over 10 min as an intravenous bolus dose. This was followed by a continuous infusion of 0.5 µg/kg/h dexmedetomidine with 0.5 mg/kg/h ketamine. DP group (n = 28): Patients were given a mix of propofol (0.5 mg/kg) and dexmedetomidine (1 µg/kg) diluted in 10 ml of saline solution infused over 10 min as an intravenous bolus dose. This was followed by a continuous infusion of 0.5 µg/kg/h dexmedetomidine with 0.5 mg/kg/h propofol. The infused solutions were in two separate syringe pumps. The target was to achieve a modified Observer's Assessment of Alertness and Sedation score (OAA/S) of 3, and the infusion was stopped by finishing the skin suture.Results: The onset of sedation using OAA/S was significantly longer in the DK group (413.21 ± 49.18 s.) compared to (297.21 ± 37.68 s.) in the DP group. The number of participants with an airway obstruction score of 1 and 2 was significantly higher in the DK group compared to the DP group; however, those with a score of 3 were significantly higher in the DP group. The total number of patients needing intraoperative fentanyl was comparable between groups. The number of patients who developed intraoperative hypotension, bradycardia, bradypnea, and hypoxemia was significantly higher in the DP group compared to the DK group (p < 0.05). There was an improvement in postoperative Markwalder's Neurological Grading Scale (MNG) scores compared to preoperatively in both the DK and DP groups. The recovery time was significantly longer in the DK group (8.75 ± 1.17 min) compared to (5.73 ± 0.75 min) in the DP group, with comparable surgeon satisfaction.Conclusions: Combining dexmedetomidine with ketamine is safer than dexmedetomidine with propofol for effective monitored anesthesia care in high-risk patients undergoing burr-hole surgery for evacuating chronic subdural hematoma.Institutional Review Board approval (ref: 6434/25-10-2020).ClinicalTrials.gov (ref: NCT04621526, the date of registration: 9-11-2020).

Opioid-free anesthesia using a combination of ketamine and dexmedetomidine in patients undergoing laparoscopic cholecystectomy: a randomized controlled trial.

Opioids administered as bolus doses or continuous infusions are widely used for major and daycare surgeries. Opioid-free anesthesia is multimodal anesthesia and analgesia that does not use opioids, benefiting patients from opioid-related adverse effects. We compared the postoperative analgesic requirements of patients scheduled for elective laparoscopic cholecystectomy under opioid-free and opioid-based anesthesia. Study included 88 patients aged 18-60 years with American Society of Anesthesiologists physical status 1 and 2 who underwent elective laparoscopic cholecystectomy. Participants were randomly divided into two groups with 44 in each. The opioid-free group was administered an intravenous bolus of ketamine and dexmedetomidine, whereas fentanyl was used in opioid group. Primary outcome was to compare the total amount of fentanyl consumed by both groups during 6 h postoperative period. Episodes of postoperative nausea and vomiting (PONV) and vital signs were noted throughout the postoperative period to analyze the secondary outcomes. Both groups had similar demographic characteristics. The opioid-free group required lesser analgesia within the first 2 h (61.4 ± 17.4 vs. 79.0 ± 19.4 of fentanyl, P < 0.001), which was statistically significant. However, fentanyl consumption was comparable between the groups at 6 h (152 ± 28.2 vs. 164 ± 33.4, P = 0.061). Compared with 4.5% of the participants in the opioid-free group, 34% of those in the opioid-based group developed moderate PONV. Opioid-free anesthesia in patients undergoing laparoscopic cholecystectomy reduced the requirement of analgesia in first two-hour postoperative period and was associated with decreased PONV.

A comparison of port-site infiltration with bupivacaine alone vs. bupivacaine plus dexemedetomidine after diagnostic staging laparoscopy.

To compare the effects of bupivacaine alone and in combination with dexmedetomidine following staging laparoscopies. This triple-blinded, prospective study was conducted from June to September 2021 at a tertiary care cancer hospital in Lahore, Pakistan, and comprised adult patients having American Society of Anaesthesiologists grade I-III, weighing >30kg and undergoing diagnostic staging laparoscopy. The subjects were randomised into two equal groups. Group A received 6ml of 2mg/kg bupivacaine at each of the four laparoscopic port sites before skin closure, while group B additionally received 2μg/kg dexmedetomidine. The presence and severity of pain were recorded and assessed at 15 min, 1, 2 and 4 hours as well as at the time of discharge from the post-anaesthesia care unit. The time to first request for rescue analgesia, total morphine consumption, and the occurrence of any side effects during their stay were also recorded. Data was analysed using SPSS 23. Of the 30 patients, 15(50%) were in group A; 10(66.6%) males and 5(33.3%) females with mean age 43.27±7.59 years. There were 15(50%) patients in group B; 12(80%) males and 3(20%) females with mean age 41.36±12.42 years (p>0.05). Of the total, 29(96.66%) patients were classified as American Society of Anaesthesiologists grade II, and 1(3.33%) patient in group A was grade III. There was no significant difference between the groups in any of the outcome measures assessed (p>0.05), and none of the patients experienced any side effect throughout the post-operative stay. The combination of dexmedetomidine and bupivacaine had no significant improvement in pain relief compared to bupivacaine alone.

Observation on the Analgesic Effect of Different Doses of a Combination of Esketamine and Dexmedetomidine Administered for Percutaneous Endoscopic Transforaminal Discectomy: A Randomized, Double-Blind Controlled Trial.

Percutaneous endoscopic transforaminal discectomy (PETD) is an effective method for treating lumbar disc herniation, and is typically performed under local anesthesia. However, inadequate analgesia during the procedure remains a concern, prompting the search for a medication that can provide optimal pain control with minimal impact on the respiratory and circulatory systems. The aim of this study was to observe the effects of different doses of esketamine combined with dexmedetomidine on reducing visual analog scale (VAS) scores during surgical interventions. One hundred two patients who underwent PETD were randomly divided into a control group (group C: normal saline + dexmedetomidine), an E1 group (0.1 mg kg-1 esketamine + dexmedetomidine), and an E2 group (0.2 mg kg-1 esketamine + dexmedetomidine). The primary outcome was the maximum visual analogue scale (VAS) (score: 0 = no pain and 10 = worst pain) at six time points. The secondary outcomes included the Assessment of Alertness/Sedation Scale (OAA/S) score and mean arterial pressure (BP), heart rate (HR), respiratory rate (RR), and oxygen saturation (SpO2) at 11 time points. The incidence of adverse reactions during and 24 h after the operation and patient satisfaction with the anesthesia were also recorded. Compared with those in group C, the VAS scores of patients in groups E1 and E2 were lower at T6, T7, and T9 (P < 0.05). From T4 to T10, the OAA/S scores of the E1 and E2 groups were both lower than those of group C (P < 0.05), and at the T4-T6 time points, the OAA/S score of the E2 group was lower than that of group E1 (P < 0.05). At T4 and T5, the HR and BP of patients in groups E1 and E2 were greater than those in group C (P < 0.05). Compared with those in group C, the incidences of intraoperative illusion, floating sensation, postoperative dizziness, and hyperalgesia in groups E1 and E2 were significantly greater (P < 0.01). There was no significant difference in patient RR, SpO2, or postoperative satisfaction with anesthesia among the three groups (P > 0.05). The combination of esketamine and dexmedetomidine can reduce VAS scores during certain stages of this type of surgery; it has minimal impact on respiration and circulation. However, this approach is associated with increased incidences of postoperative dizziness and psychiatric side effects, which may also affect patients' compliance with surgical instructions from medical staff. Patient satisfaction was not greater with dexmedetomidine combined with esketamine than with dexmedetomidine alone. http://www.chictr.org.cn . Identifier: ChiCTR2300068206. Date of registration: 10 February 2023.

Comparative study between Ketamine and Propofol versus Ketamine and Dexmedetomidine for Monitored Anaesthesia Care for Dilatation and Curettage surgeries in Daycare procedures

Introduction. Anaesthesia is frequently administered through Monitored Anaesthesia Care (MAC) utilising various combinations of anaesthetic drugs for moderately painful operations like Dilatation and Curettage (D&amp;C), which is preferably done as a daycare procedure. The hunt for improved drug combinations is always ongoing, and the pharmacological properties of the individual drugs are considered. In this regard, anaesthesiologists all over the world are quite fond of the combination of Ketamine and Propofol, which is also known as Ketofol. Recently, especially in situations involving MRI sedation, the combination of ketamine and dexmedetomidine (Dexket) has gained popularity. This study compares the combinations for MAC during D&amp;C surgeries in a daycare setting. Aim. The primary objective was to estimate the recovery times using either combination. Secondarily, we would also compare the duration of analgesia, the haemodynamics, and the side-effect profiles of the two combinations. Material and Methods. This study enrolled 60 patients posted for elective D&amp;C. According to standard institutional protocols, they were administered Ketofol(KP group) or Dexket(KD group), depending on the anaesthesia provider’s choice. The Ketofol group received Ketamine 1mg/kg and Propofol 1mg/kg with boluses of Ketamine 0.25mg/kg to maintain the depth of anaesthesia using Ramsay sedation score(RSS) &gt;3. KD group received Dexmedetomidine intravenously 1mic/kg over 10 minutes followed by ketamine 1mg/kg boluses of Ketamine 0.25mg/kg to maintain the adequate anaesthetic depth of RSS&gt;3. Results. The Recovery time in post-operative period was significantly prolonged in the KD group (mean 22.77 minutes) compared to the KP group (mean 17.8 minutes). The total duration of analgesia was also longer in the KD group (250 minutes vs 220 minutes in the KP group). It was seen that the hemodynamic variables (HR, SBP, DBP) were consistently higher in the KD group compared to the KP group. There was a significant difference in SBP, DBP, and MAP in the intraoperative period between the KP and KD groups till 4hr in the postoperative period. Conclusions. We conclude that a combination of Dexmedetomidine and Ketamine has longer recovery times and analgesia duration than a combination of Propofol and Ketamine. Side effects like postoperative nausea and vomiting are not significant. However, since the recovery times are comparatively longer in a daycare setting, dexmedetomidine and Ketamine may not be the preferred agents compared to the combination of Ketamine and Propofol in the context of a daycare setting.

The Effect of Dexmedetomidine as a Local Anesthetic Adjuvant for Iliac Fascia Compartment Block on Postoperative Delirium in Elderly Patients Undergoing Elective Hip Surgery

Introduction: We analyzed the effect of dexmedetomidine (DEX) as a local anesthetic adjuvant on postoperative delirium (POD) in elderly patients undergoing elective hip surgery. Methods: In this study, 120 patients undergoing hip surgery were enrolled and randomly assigned to two groups: fascia iliaca compartment block with DEX + ropivacaine (the Y group, n = 60) and fascia iliaca compartment block with ropivacaine (the R group, n = 60). The primary outcomes: presence of delirium during the postanesthesia care unit (PACU) period and on the first day (D1), the second day (D2), and the third day (D3) after surgery. The secondary outcomes: preoperative and postoperative C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR), occurrence of insomnia on the preoperative day, day of operation, D1 and D2; HR values of patients in both groups before iliac fascia block (T1), 30 min after iliac fascia block (T2), at surgical incision (T3), 20 min after incision (T4), when they were transferred out of the operating room (T5) and after leaving the recovery room (T6) at each time point; VAS for T1, PACU, D1, D2; the number of patients requiring remedial analgesics within 24 h after blockade and related complications between the two groups. Results: A total of 97 patients were included in the final analysis, with 11 and 12 patients withdrawing from the R and Y groups, respectively. The overall incidence of POD and its incidence in the PACU and ward were all lesser in the Y group than in the R group (p p p Conclusion: Ultrasound-guided high fascia iliaca compartment block with a combination of ropivacaine and DEX can reduce the incidence of POD, the use of intraoperative opioids and postoperative remedial analgesics, and postoperative inflammation in elderly patients who have undergone hip surgery, indicating that this method could be beneficial in the prevention and treatment of POD.

Sedative and cardiorespiratory effects of dexmedetomidine alone or combined with acepromazine in healthy cats

The purpose of this study was to assess sedation, emesis and cardiovascular effects of dexmedetomidine alone or combined with acepromazine in healthy cats. Fourteen male cats aged 0.9 ± 0.5 years and weighing 3.7 ± 0.7 kg were randomly assigned to one of two experimental groups: GD, dexmedetomidine 5 µg/kg; and GDA, dexmedetomidine 5 µg/kg with acepromazine 0.03 mg/kg, all intramuscularly. Measurements were recorded at baseline, at 20 minutes and then at 10–minute intervals following sedation and included heart rate (HR), respiratory rate (FR), systolic arterial pressure (SAP), rectal temperature (RT), number of episodes of emesis and sedation score (0–4). Data were compared using ANOVA for repeated measures followed by Šídák and Dunnet test. Sedation scores were compared between groups at T20 using Mann-Whitney test. Significance was considered when P <0.05. At T20, HR was significantly lower in GDA (99 ± 14 beats/min) compared with GD (133 ± 19 beats/min) and SAP was significantly lower in both groups compared with baseline (126 ± 14 vs. 148 ± 26 and 111 ± 13 vs. 144 ± 17 mmHg in GD and GDA, respectively). Duration of sedation was similar between groups, although sedation scores differed significantly at T20, with 1 (0–4) in GD and 4 (4–4) in GDA. More episodes of emesis were recorded in GD compared with GDA. The combination of dexmedetomidine and acepromazine produced more profound sedation with faster onset and lower incidence of emesis compared with dexmedetomidine alone in healthy cats.

COMPARISON OF SUBCUTANEOUS ALFAXALONE AND SUBCUTANEOUS ALFAXALONE-DEXMEDETOMIDINE FOR SEDATION IN THE HOUSTON TOAD (ANAXYRUS HOUSTONENSIS).

The Houston toad (Anaxyrus houstonensis), a primarily terrestrial amphibian of south-central Texas, has been listed as federally endangered since 1970. Sedation is an important tool for obtaining diagnostics and providing treatment in this species. This prospective, randomized, and blinded study compared the sedative effects of SC alfaxalone (Protocol A) at approximately 12 mg/kg (median [range] = 12.70 [12.09-13.95] mg/kg] to SC alfaxalone-dexmedetomidine (Protocol AD) at approximately 12 mg/kg (median [range] = 12.68 [12.16-13.56] mg/kg) and 0.1 mg/kg (median [range] = 0.1 [0.07-0.13] mg/kg), respectively, in adult Houston toads (n = 26). Toads from Protocol AD received atipamezole SC at approximately 1 mg/kg (median [range] = 0.96 [0.75-1.25] mg/kg) 45 min postinduction, whereas toads from Protocol A received the equivalent volume of SC sterile saline at the same time point. Heart rate, gular rate, and times to first effect, loss of righting reflex, ability to position for radiographs, loss of nociception, return of righting reflex, and full recovery were recorded. A significantly greater number of toads lost righting reflex, positioned for radiographs, and lost nociception with Protocol AD compared with Protocol A. Additionally, time to return of righting reflex and time to full recovery were significantly longer with Protocol AD than with Protocol A. The protocols did not differ significantly in time to first effect, time to radiographic positioning, or time to loss of nociception. Histologic examination of four toads euthanized during the study revealed acute injection site reactions from all administered drugs, including saline. No clinical adverse reactions were observed. This study demonstrates that the combination of SC alfaxalone and dexmedetomidine results in deeper sedation than SC alfaxalone alone, but also correlates with longer recovery times despite antagonist administration.

Comparison of effectiveness of combination of xylocaine and dexmedetomidine with xylocaine alone in biers block of upper limb.

Objective: To evaluate two groups (combination versus xylocaine alone) in terms of onset of motor block, duration of block, and postoperative analgesia following the release of the tourniquet. Study Design: Quasi Experimental study. Setting: Chaudhary Muhammad Akram Teaching &amp; Research Hospital. Period: 01 June 2023 to 30 Nov 2023. Material &amp; Methods: Quasi experimental study design with a sample of total 80 patients divided into two groups of 40 each (xylocaine alone &amp; combination of xylocaine and dexmedetomidine) were selected by using non probability convenient sampling technique. Results: Combining dexmedetomidine with xylocaine in Bier's block for upper limb surgery demonstrated significant advantages. Group B exhibited faster onset (3.8 min), prolong motor block, and prolonged postoperative analgesia (12.4 hrs) compared to group A (xylocaine alone: 5.2 min onset &amp; shorter postoperative analgesia 6.8 hrs). Dexmedetomidine enhanced post-operative pain control, showcasing its effectiveness in improving outcomes for Bier's block procedures. Conclusion: Dexmedetomidine enhances Bier's block with xylocaine, providing faster onset, extended motor block, and superior post-operative analgesia for upper limb surgery.

Ketodex versus opioid based anesthesia in cleft palate

Background &amp; objective: Cleft palate is a congenital anomaly of the palate of the infants, and it may or may not be associated with cleft lip. The only remedy is surgical repair under general anesthesia. Postoperative pain relief in cleft palate repair surgery is very important to keep the infant or child calm and pain-free. It can only be achieved by use of analgesic drugs. We compared ketodex - a combination of ketamine and dexmedetomidine, versus opioid based anesthesia in cleft palate surgery as regards postoperative respiratory depression, need for oxygenation, and the emergence agitation.&#x0D; Methodology: Fifty children, aged 6 months to 5 y, undergoing cleft palate surgery under general anesthesia, were randomly assigned to either ketodex group (Group KD) or opioids group (Group OP). Group KD received ketamine 1mg/kg loading dose followed by infusion @ 0.1 mg/kg/h, and dexmedetomidine loading dose 1 µg/kg followed by infusion @ 0.2 µg/kg/h], isoflurane anesthesia. Group OP received fentanyl in a loading dose of 2 µg/kg followed by infusion @ 0.5 µg/kg/h, followed by isoflurane anesthesia. Heart rate, mean blood pressure, emergence agitation, extubation time, FLACC score for pain, surgeons’ satisfaction, and the adverse effects were noted.&#x0D; Results: Emergence agitation score was significantly lower in Group KD compared to Group OP. FLACC score showed insignificant difference between the two groups. There was no need for opioid administration in the PACU. Three patients in Group OP desaturated and needed oxygen supply. Incidence of vomiting was significantly higher in Group OP compared to Group KD (P = 0.022).&#x0D; Conclusion: Ketodex used in opioid free anesthesia for cleft palate repair surgery in children provides adequate pain relief without respiratory depression, and is a good alternative of routine opioid based general anesthesia.&#x0D; Key words: Ketamine; Dexmedetomidine; Opioids; Anesthesia; Recovery; Cleft Palate Surgery; Pediatrics&#x0D; Citation: Mohamed MM, Abdelraof AF, Noser MA. Ketodex versus opioid based anesthesia in cleft palate. Anaesth. pain intensive care 2024;28(1):74-80; DOI: 10.35975/apic.v28i1.2239&#x0D; Received: May 31, 2023; Reviewed: June 06, 2023; Accepted: January 02, 2024

Effects of dexmedetomidine combined with etomidate on postoperative cognitive function in older patients undergoing total intravenous anaesthesia: a randomized, double-blind, controlled trial

BackgroundEtomidate has been advocated for anesthesia in older and critically ill patients because of its hemodynamic stability. Clinical studies have shown that dexmedetomidine has neuroprotective and anti-inflammatory properties and improves postoperative cognitive dysfunction in older patients. The present study was to evaluate the effects of the combination of etomidate and dexmedetomidine with different anaesthesia time on postoperative cognitive function in older patients.MethodsA total of 132 older patients undergoing ureteroscopic holmium laser lithotripsy were randomly divided into EN group and ED group equally. Patients whose surgery time was less than or equal to 1 h in each group were allocated to short-time surgery group (EN1 group and ED1 group), and whose surgery time was more than 1h were allocated to long-term surgery group (EN2 group and ED2 group). The primary outcome was the score of the Mini-Mental State Examination. The secondary outcomes were State-Trait Anxiety Inventory scores, Riker sedation agitation scores, Zung Self-Rating Depression Scale scores, the memory span for Arabic numerals, the plasma concentrations of S-100 calcium-binding protein B and neuron specific enolase, the time to spontaneous respiration, recovery, and extubation.ResultsThe MMSE scores at t2-3 were higher in ED1 and ED2 groups than in EN1 and EN2 groups (p<0.05). Compared with ED1 and ED2 groups, the ZSDS scores, the S-AI scores and the T-AI scores at t1-2 were higher in EN1 and EN2 groups (p<0.05), respectively. The recalled Arabic numbers at t1-3 were higher in ED2 group than in EN2 group (p<0.05). The plasma concentration of S-100β at t1-2 in EN1 group and t1-3 in EN2 group were higher than that in ED1 and ED2 groups (p<0.05), respectively. Compared with ED1 and ED2 groups, the plasma concentrations of NSE were higher at t1-3 in EN1 group and t1-4 in EN2 group (p<0.05), respectively.ConclusionThe administration of dexmedetomidine could improve postoperative cognitive dysfunction, emergence agitation, depression and anxiety, attenuate the plasma concentrations of S-100β and NSE in older patients undergoing total intravenous anaesthesia with etomidate.Trial registrationRegistration number: ChiCTR1800015421, Date: 29/03/2018.

Effects of combined dexamethasone and dexmedetomidine as adjuncts to peripheral nerve blocks: a systematic review with meta-analysis and trial sequential analysis.

The effects of combining dexamethasone and dexmedetomidine on block duration are unclear. To investigate the effects of combining dexamethasone and dexmedetomidine on block duration. Systematic review of randomized controlled trials (RCTs) from Medline, Embase, CENTRAL, CINAHL, the Web of Science, and BIOSIS until June 8, 2023. RCTs with adults undergoing surgery with a peripheral nerve block randomized to combined dexamethasone and dexmedetomidine versus placebo or other adjuncts were eligible. Primary outcome was duration of analgesia. We performed meta-analysis, trial sequential analysis, risk of bias-2, and Grading Recommendations Assessment, Development, and Evaluation assessment. We included 9 RCTs with 14 eligible comparisons. The combination of dexamethasone and dexmedetomidine was compared with placebo in three RCTs (173 participants), dexamethasone in seven (569 participants), and dexmedetomidine in four (281 participants). The duration of analgesia was likely increased with the combination versus placebo (mean difference 460 min, 95% CI 249 to 671) and versus dexmedetomidine (mean difference 388 min, 95% CI 211 to 565). The duration was likely similar with the combination versus dexamethasone (mean difference 50 min, 95% CI -140 to 239). The certainty of the evidence was moderate because most trials were at high risk of bias. Combined dexamethasone and dexmedetomidine likely increased the duration of analgesia when compared with placebo and dexmedetomidine. The combination likely provided a similar duration of analgesia as dexamethasone. Based on this systematic review, it seems reasonable to use dexamethasone as the sole adjunct if the goal is to increase the duration of analgesia.

Efficacy of intranasal administration of dexmedetomidine in combination with midazolam for sedation in infant with cleft lip and palate undergoing CT scan: a randomized controlled trial

BackgroundThere is a great challenge to sedation for infants with cleft lip and palate undergoing CT scan, because there is the younger age and no consensus on the type, dosage, and route of drug administration.ObjectiveThis study aimed to evaluate the efficacy of intranasal administration of dexmedetomidine combined with midazolam as a sedative option for infants with cleft lip and palate under imaging procedures.MethodsInfants scheduled for cleft lip and palate repair surgery were randomly assigned to the IND group (intranasal dexmedetomidine 2 µg/kg alone) and the INDM group (intranasal dexmedetomidine 2 µg/kg combined with midazolam 0.05 mg/kg). The primary outcome was the proportion of infants underwent successful computed tomography (CT) scans under intranasal sedation. The secondary outcomes included onset time and duration of sedation, recovery time, Ramsay sedation scale, hemodynamic parameters during sedation, and adverse events. Data analyses involved the unpaired t-test, the repeated-measures analysis of variance test, and the continuity correction χ2 test.ResultsOne hundred five infants were included in the analysis. The proportion of infants underwent successful CT scans under sedation was significantly greater in the INDM group than in the IND group (47 [95.9%] vs. 45 [80.4%], p = 0.016). Additionally, the INDM group had a shorter onset time and a longer duration of sedation statistically (12 [8.5, 17] min vs. 16 [12, 20] min, p = 0.001; 80 [63.6, 92.5] min vs. 68.5 [38, 89] min, p = 0.014, respectively), and their recovery time was significantly longer (43 [30, 59.5] min vs. 31.5 [20.5, 53.5] min, p = 0.006). The difference in Ramsay sedation scale values 20 min after administration was statistically significant between the groups. No statistically significant difference was found between the groups in changes in heart rate and respiratory rate.ConclusionIntranasal administration of dexmedetomidine in combination with midazolam resulted in higher sedation success in comparison with sole dexmedetomidine. However, it has a relatively prolonged duration of sedation and recovery time.Trial registrationChiCTR2100049122, Clinical trial first registration date: 21/07/2021.

Ketodex for Electroconvulsive Therapy in Patients with Psychotic Disorders: A Case Series

Before the introduction of antipsychotic medications, Electroconvulsive Therapy (ECT) was considered one of the first-line treatments for psychotic disorders. Although ECT is still recommended for certain patients with psychosis, the widespread use of antipsychotic drugs has made it less commonly utilised. However, the combination of ketamine and dexmedetomidine (Ketodex) may prove beneficial in controlling the haemodynamic response and preventing emergent confusion due to their opposing drug actions. Nonetheless, the use of Ketodex in patients with psychosis undergoing ECT has not been thoroughly explored. This series presents cases of five patients (22 years female, 25 years female, 28 years male, 19 years female and 25 years female patients) who underwent 25 sessions of ECT with the ketamine-dexmedetomidine combination. All patients demonstrated good cardiovascular stability without experiencing emergent confusion. Based on these findings, the study concludes that the combination of ketamine and dexmedetomidine is both effective and safe for patients with psychosis undergoing ECT.

Combination of Dexmedetomidine with Bupivacaine versus Fentanyl with Bupivacaine Intrathecally for Prolongation of Postoperative Analgesia in Lower Limb Surgeries: A Randomised Clinical Study

Introduction: Intrathecal adjuvants can be added to extend the duration of analgesia. To achieve this, several adjuvants, such as the combination of dexmedetomidine with bupivacaine versus fentanyl with bupivacaine, have been used with local anaesthesia during lower limb surgeries. Aim: To compare the combination of dexmedetomidine versus fentanyl with bupivacaine administered intrathecally for the onset and duration of sensory and motor block, as well as their sideeffects and the prolongation of postoperative analgesia in lower limb surgeries. Materials and Methods: A randomised clinical study was conducted on 120 American Society of Anaesthesiologists (ASA) grade I or II patients, aged between 18 and 65 years, who were admitted to the Department of Orthopaedics and General Surgery, Aarupadai Veedu Medical College and Hospital, Puducherry, India for lower limb surgeries under spinal anaesthesia. The patients were randomly assigned to two groups using a computer-generated technique. Group BD received 0.5% bupivacaine (2.5 mL)+10 mcg dexmedetomidine (0.5 mL), while Group BF received 0.5% bupivacaine (2.5 mL)+25 mcg fentanyl (0.5 mL). The onset and duration of sensory and motor blockade, haemodynamic parameters, sedation, and sideeffects of the drugs were analysed. Statistical analysis was performed using Statistical Package for Social Sciences (SPSS) version 2.0 after collecting all the data. Results: There were no statistically significant differences in the subjects’ demographics or duration of surgery. However, the duration of sensory block and motor block was significantly prolonged in Group BD compared to Group BF, with values of 720±32 and 640±32, respectively. The mean Heart Rates (HR) differed significantly between of the two groups (p-value=0.03). There was no significant difference in sedation scores between the two groups. Group BD showed a higher incidence of bradycardia (n=35) and hypertension (n=32). Conclusion: The combination of dexmedetomidine with bupivacaine, when used intrathecally for lower limb surgeries, demonstrated superior effectiveness in terms of prolonging sensory and motor block duration and providing extended postoperative analgesia, compared to the combination of bupivacaine and fentanyl. However, it is important to note that patients receiving the dexmedetomidine-bupivacaine combination had a higher incidence of bradycardia and hypertension. Therefore, careful monitoring and management of haemodynamic parameters are necessary when using this combination.

Avaliação clínica e Doppler ecocardiográfica de coelhos sedados com dexmedetomidina em combinação com midazolam e morfina

ABSTRACT: The objective of the present study was to evaluate clinical, cardiorespiratory, and Doppler echocardiographic changes in rabbits sedated with midazolam and morphine combined with or without dexmedetomidine. This study was a blinded, randomized, controlled experiment that included 16 adult male New Zealand rabbits weighing 3.1 ± 0.3 kg. The animals were sedated using one of the following protocols: 1 mg/kg midazolam and 2 mg/kg morphine (MIDA, n = 8), or 25 mg/kg dexmedetomidine, 2 mg/kg morphine and 1 mg/kg midazolam (DEX, n = 8). Sedation latency, duration of the sedation and recovery period, sedation scores, heart rate (HR), respiratory rate (f), peripheral oxygen saturation (SpO2), systolic arterial pressure (SAP), diastolic arterial pressure (DAP), mean arterial pressure (MAP), and recta temperature were recorded, and Doppler echocardiography was performed. Latency periods were 7.3±1.6 min in the DEX group and 10.9 ± 5.0 min in the MIDA group (P = 0.112). Sedation duration was 122.4±14 min in the DEX group and 71.2 ± 32 min in the MIDA group (P = 0.005), whereas recovery time was 35.7±17.7 min in the DEX group and 32.5 ± 25.3 min in the MIDA group (P = 0.743). The sedation scores for the DEX group were significantly higher than those for the MIDA group throughout the monitoring period. Reductions in HR, SAP, MAP, and DAP values were observed in both groups relative to baseline values, and were significantly lower in the DEX group compared to the MIDA group. Minimal Doppler echocardiographic changes were observed. Dexmedetomidine used in combination with midazolam and morphine incremented the quality and duration of sedation in rabbits. Both protocols elicited cardiorespiratory changes that were well-tolerated, with minimal changes in myocardial function.

The Anesthetic Effect of Oral Administration of α-Chloroaldose and Dexmedetomidine on Silver Fox

In the past, anesthesia was delivered to foxes mostly through intramuscular or subcutaneous injection, which caused substantial stress to the animals, making it necessary to restrain them physically before the procedure. Moreover, research on anesthesia technology for domestic animals has been insufficient. Therefore, in this study, the α-chloroaldose and dexmedetomidine combination was used via oral administration to anesthetize foxes. Ten healthy silver foxes were administered the combination of oral anesthesia, and routine physiological indicators, anesthesia time and effects, and biological reflexes were continuously monitored. The temperature of anesthetized foxes after the administration of oral anesthesia continued to decrease, and by the end of the monitoring, it decreased by 1.3°C.The average SpO2 was 95.3 ± 2.2% during the whole anesthesia period. Changes in the heart rate were significant, initially showing a decreasing trend and then an increasing trend. The anesthesia period showed characteristics of smooth induction, proper maintenance, and rapid recovery. The sedative, analgesic, and muscle relaxant effects were more balanced and provided a good anesthesia effect time of 30 min: corneal, eyelid, and anal biological reflexes persisted and were inhibited at 20~50 min after oral medication, which shows a suitable depth of anesthesia.

Pediatric procedural sedation: a new protocol implemented

Pediatric procedural sedation is a difficult exercise aiming to find the balance between optimal quality of a medical imaging or act, and maximal reduction of risks for the patient. Harmlessness of chloral hydrate has been recently questioned, thus promoting the use of the dexmedetomidine for these kinds of procedures. In this context we decided to develop a new protocol at the CHUV. We tested different combinations of molecules until we found the best association and dosage. We present here the analysis of our patient cohort, attesting the efficiency, reliability, and safety of combined dexmedetomidine and midazolam given intranasal for pediatric MRI.