1.Analgesic effect of "cocktail" analgesia containing high-dose compound betamethasone after revision hip arthroplasty and the use of opioid drugs.
Ning YANG ; Wulamu WUHUZI ; Xiaobin GUO ; Yicheng LI ; Xiaogang ZHANG
Chinese Journal of Reparative and Reconstructive Surgery 2025;39(3):314-319
OBJECTIVE:
To investigate the analgesic effect of locally injecting a "cocktail" analgesia containing a high-dose compound betamethasone during revision hip arthroplasty, and also to study the usage of opioid drugs.
METHODS:
A retrospective analysis was conducted on the clinical data of 180 patients who underwent revision hip arthroplasty due to aseptic loosening of the hip prosthesis between January 2015 and December 2021. Among them, 95 patients received intraoperative injection of "cocktail" analgesia containing high-dose compound betamethasone (group A), and 85 patients received intraoperative injection of traditional "cocktail" analgesia (group B). There was no significant difference in baseline data such as gender, age, body mass index, presence or absence of diabetes mellitus between the two groups ( P>0.05). The hospital stay, use of opioid drugs within 72 hours, and the incidence of adverse reactions within 72 hours after operation [including nausea and vomiting, insomnia, deep venous thrombosis (DVT), infection, etc.] were recorded and compared between the two groups. The pain relief of patients was evaluated using the static and dynamic visual analogue scale (VAS) scores at 12, 24, 48, and 72 hours after operation. The incidence of complications (including prosthesis re-loosening, hip joint dislocation, hip joint stiffness, limping, chronic pain, etc.) at 2 years after operation was recorded, and the Harris Hip Score (HHS) was used to evaluate the function at 2 years after operation.
RESULTS:
In group A, the utilization rate of opioid drugs within 72 hours after operation was significantly lower than that in group B ( P<0.05). However, there was no significant difference between the two groups in terms of hospital stay, as well as the incidence of adverse reactions such as nausea and vomiting, insomnia, DVT, and infection within 72 hours after operation ( P>0.05). The VAS scores of both groups decreased with time, and the differences between different time points were significant ( P<0.05). The static and dynamic VAS scores of group A were significantly lower than those of group B at 12, 24, and 48 hours after operation ( P<0.05), but there was no significant difference in static and dynamic VAS scores between the two groups at 72 hours after operation ( P>0.05). All patients in both groups were followed up 2-8 years, with an average of 5.73 years. At 2 years after operation, no significant difference was found between the two groups in the incidence of complications and HHS score ( P>0.05).
CONCLUSION
"Cocktail" analgesia containing a high-dose compound betamethasone for early analgesia after revision hip arthroplasty can effectively reduce postoperative pain and the use of opioid drugs, but will not increase the incidence of infection and DVT after operation.
Humans
;
Arthroplasty, Replacement, Hip/adverse effects*
;
Betamethasone/therapeutic use*
;
Retrospective Studies
;
Male
;
Female
;
Analgesics, Opioid/administration & dosage*
;
Pain, Postoperative/prevention & control*
;
Middle Aged
;
Reoperation
;
Aged
;
Analgesia/methods*
;
Adult
;
Pain Measurement
;
Pain Management/methods*
;
Prosthesis Failure
;
Hip Prosthesis
2.Assessment and management of analgesic and sedation in critically ill patients from ICU in Guizhou Province.
Ya WEI ; Qianfu ZHANG ; Hongying BI ; Dehua HE ; Jianyu FU ; Yan TANG ; Xu LIU
Chinese Critical Care Medicine 2025;37(9):861-865
OBJECTIVE:
To investigate the current status of early pain and agitation management in critically ill patients in Guizhou Province.
METHODS:
A retrospective study was performed using data collected from a quality control activity conducted between April and June 2021 in non-provincial public hospitals with general intensive care unit (ICU) in Guizhou Province. Hospital-level data included hospital name and grade, ICU staffing, and number of ICU beds. Patient-level data included characteristics of patients treated in the general ICU on the day of the survey (e.g., age, sex, primary diagnosis), as well as pain and agitation assessments and the types of analgesic and sedative medications administered within 24 hours of ICU admission.
RESULTS:
A total of 947 critically ill ICU patients from 145 hospitals were included, among which 104 were secondary-level hospitals and 41 were tertiary-level hospitals. Within 24 hours of ICU admission, 312 (32.9%) critically ill patients received pain assessments, and 277 (29.3%) received agitation assessments. Among the pain assessment tools, the critical care pain observation tool (CPOT) was used in 44.2% (138/312) of critically ill ICU patients, with a significantly higher usage rate in tertiary hospitals compared to secondary hospitals [52.3% (69/132) vs. 38.3% (69/180), P < 0.05]. The Richmond agitation-sedation scale (RASS) was used in 93.8% (260/277) of critically ill ICU patients for agitation assessment, with no significant difference between hospital levels. Among the 947 critically ill patients, 592 (62.5%) received intravenous analgesics within 24 hours, with remifentanil being the most commonly used [42.9% (254/592)]; 510 (53.9%) received intravenous sedatives, with midazolam being the most frequently used [60.8% (310/510)]. Mechanical ventilation data were available for 932 critically ill patients, of whom 579 (62.1%) received mechanical ventilation and 353 (37.9%) did not. Compared with non-ventilated patients, ventilated patients had significantly higher rates of analgesic and sedative use [analgesics: 77.9% (451/579) vs. 38.8% (137/353); sedatives: 71.8% (416/579) vs. 25.8% (91/353); both P < 0.05]. In terms of analgesic selection, ventilated patients were more likely to receive strong opioids than non-ventilated patients [85.8% (95/137) vs. 69.3% (387/451), P < 0.05]. For sedatives, ventilated patients preferred midazolam [66.6% (277/416)], whereas non-ventilated patients more often received dexmedetomidine [45.1 (41/91)]. Blood pressure within 24 hours of ICU admission were available for 822 critically ill patients, of whom 245 (29.8%) had hypotension and 577 (70.2%) did not. Compared with non-hypotensive patients, hypotensive patients had significantly higher rates of analgesic and sedative use [analgesics: 74.7% (183/245) vs. 59.8% (345/577); sedatives: 65.7% (161/245) vs. 51.3% (296/577); both P < 0.05], but there was no significant difference in the choice of analgesic or sedative agents between the two groups.
CONCLUSIONS
The proportion of critically ill ICU patients in Guizhou Province who received standardized pain and agitation assessments was relatively low. The most commonly used assessment tools were CPOT and RASS, while remifentanil and midazolam were the most frequently used analgesic and sedative agents, respectively. Secondary-level hospitals had a lower rate of using standardized pain assessment tools compared to tertiary-level hospitals. Mechanical ventilation and hypotension were associated with the use of analgesic and sedative medications.
Humans
;
Critical Illness
;
Intensive Care Units
;
Analgesics/therapeutic use*
;
Hypnotics and Sedatives/therapeutic use*
;
Retrospective Studies
;
China
;
Pain Measurement
;
Pain Management
;
Female
;
Male
;
Critical Care
;
Middle Aged
3.Effects of local infiltration of analgesia and tranexamic acid in total knee replacements: safety and efficacy in reducing blood loss and comparability to intra-articular tranexamic acid.
Harish SIVASUBRAMANIAN ; Cheryl Marise Peilin TAN ; Lushun WANG
Singapore medical journal 2024;65(1):16-22
INTRODUCTION:
The use of periarticular (PA) tranexamic acid (TXA) and its efficacy in comparison with intra-articular (IA) TXA have not been well explored in the literature. This retrospective cohort study aimed to compare the effects of IA and PA TXA with analgesic components in reducing blood loss and improving immediate postoperative pain relief and functional outcomes in patients after unilateral primary total knee arthroplasty (TKA).
METHODS:
A total of 63 patients underwent TKA, and they were divided into the IA TXA delivery group ( n = 42) and PA TXA delivery group ( n = 21). All patients were administered 1 g of TXA. They also received pericapsular infiltration consisting of 0.5 mL of adrenaline, 0.4 mL of morphine, 1 g of vancomycin, 1 mL of ketorolac and 15 mL of ropivacaine. Outcomes for blood loss and surrogate markers for immediate functional recovery were measured.
RESULTS:
Of the 63 patients, 54% were female and 46% male. The mean drop in postoperative haemoglobin levels in the PA and IA groups was 2.0 g/dL and 1.6 g/dL, respectively, and this was not statistically significant ( P = 0.10). The mean haematocrit drop in the PA and IA groups was 6.1% and 5.3%, respectively, and this was also not statistically significant ( P = 0.58). The postoperative day (POD) 1 and discharge day flexion angles, POD 1 and POD 2 visual analogue scale (VAS) scores, gait distance on discharge and length of hospitalisation stay were largely similar in the two groups.
CONCLUSION
Our study showed that both IA and PA TXA with analgesic components were equally efficient in reducing blood loss and improving immediate postoperative pain relief and functional outcomes.
Humans
;
Male
;
Female
;
Tranexamic Acid/adverse effects*
;
Arthroplasty, Replacement, Knee/adverse effects*
;
Antifibrinolytic Agents/adverse effects*
;
Retrospective Studies
;
Postoperative Hemorrhage
;
Blood Loss, Surgical/prevention & control*
;
Administration, Intravenous
;
Analgesia
;
Analgesics/therapeutic use*
;
Pain, Postoperative/drug therapy*
;
Injections, Intra-Articular
4.Treatment duration of wrist-ankle acupuncture for relieving post-thyroidectomy pain: A randomized controlled trial.
Xin-Rui HAN ; Wei YUE ; Hui-Chao CHEN ; Wei HE ; Jiang-He LUO ; Shan-Xia CHEN ; Na LIU ; Ming YANG
Journal of Integrative Medicine 2023;21(2):168-175
BACKGROUND:
Treatment duration of wrist-ankle acupuncture (WAA) is uncertain for post-thyroidectomy pain relief.
OBJECTIVE:
This study evaluated the effect of different WAA treatment duration on post-operative pain relief and other discomforts associated with thyroidectomy.
DESIGN, SETTING, PARTICIPANTS AND INTERVENTION:
This randomized controlled trial was conducted at a single research site in Guangzhou, China. A total of 132 patients receiving thyroidectomy were randomly divided into the control group (sham WAA, 30 min) and three intervention groups (group 1: WAA, 30 min; group 2: WAA, 45 min; group 3: WAA, 60 min), with group allocation ratio of 1:1:1:1. Acupuncture was administered within 1 hour of leaving the operating room.
OUTCOMES AND MEASURES:
Primary outcome was patients' pain at the surgical site assessed by visual analogue scale (VAS) at the moment after acupuncture treatment (post-intervention). Secondary outcomes included the patients' pain VAS scores at 6, 12, 24, 48 and 72 h after the thyroidectomy, the 40-item Quality of Recovery (QoR-40) score, the grade of post-operative nausea and vomiting (PONV), and the use of additional analgesic therapy.
RESULTS:
The adjusted mean difference (AMD) in VAS scores from baseline to post-intervention in group 1 was -0.89 (95% confidence interval [CI], -1.02 to -0.76). The decrease in VAS score at post-intervention was statistically significant in group 1 compared to the control group (AMD, -0.43; 95% CI, -0.58 to -0.28; P < 0.001), and in groups 2 and 3 compared to group 1 (group 2 vs group 1: AMD, -0.65; 95% CI, -0.81 to -0.48; P < 0.001; group 3 vs group 1: AMD, -0.66; 95% CI, -0.86 to -0.47; P < 0.001). The VAS scores in the four groups converged beyond 24 h after the operation. Fewer patients in group 2 and group 3 experienced PONV in the first 24 h after operation. No statistical differences were measured in QoR-40 score and the number of patients with additional analgesic therapy.
CONCLUSION
Compared with the 30 min intervention, WAA treatment with longer needle retention time (45 or 60 min) had an advantage in pain relief within 6 h after surgery. WAA's analgesic effect lasted for 6-12 h post-operatively. Please cite this article as: Han XR, Yue W, Chen HC, He W, Luo JH, Chen SX, Liu N, Yang M. Treatment duration of wrist-ankle acupuncture for relieving post-thyroidectomy pain: A randomized controlled trial. J Integr Med. 2023; 21(2): 168-175.
Male
;
Humans
;
Ankle
;
Wrist
;
Duration of Therapy
;
Thyroidectomy
;
Postoperative Nausea and Vomiting/drug therapy*
;
Acupuncture Therapy
;
Analgesics/therapeutic use*
;
Pain/drug therapy*
5.Expert consensus on late stage of critical care management.
Bo TANG ; Wen Jin CHEN ; Li Dan JIANG ; Shi Hong ZHU ; Bin SONG ; Yan Gong CHAO ; Tian Jiao SONG ; Wei HE ; Yang LIU ; Hong Min ZHANG ; Wen Zhao CHAI ; Man hong YIN ; Ran ZHU ; Li Xia LIU ; Jun WU ; Xin DING ; Xiu Ling SHANG ; Jun DUAN ; Qiang Hong XU ; Heng ZHANG ; Xiao Meng WANG ; Qi Bing HUANG ; Rui Chen GONG ; Zun Zhu LI ; Mei Shan LU ; Xiao Ting WANG
Chinese Journal of Internal Medicine 2023;62(5):480-493
We wished to establish an expert consensus on late stage of critical care (CC) management. The panel comprised 13 experts in CC medicine. Each statement was assessed based on the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) principle. Then, the Delphi method was adopted by 17 experts to reassess the following 28 statements. (1) ESCAPE has evolved from a strategy of delirium management to a strategy of late stage of CC management. (2) The new version of ESCAPE is a strategy for optimizing treatment and comprehensive care of critically ill patients (CIPs) after the rescue period, including early mobilization, early rehabilitation, nutritional support, sleep management, mental assessment, cognitive-function training, emotional support, and optimizing sedation and analgesia. (3) Disease assessment to determine the starting point of early mobilization, early rehabilitation, and early enteral nutrition. (4) Early mobilization has synergistic effects upon the recovery of organ function. (5) Early functional exercise and rehabilitation are important means to promote CIP recovery, and gives them a sense of future prospects. (6) Timely start of enteral nutrition is conducive to early mobilization and early rehabilitation. (7) The spontaneous breathing test should be started as soon as possible, and a weaning plan should be selected step-by-step. (8) The waking process of CIPs should be realized in a planned and purposeful way. (9) Establishment of a sleep-wake rhythm is the key to sleep management in post-CC management. (10) The spontaneous awakening trial, spontaneous breathing trial, and sleep management should be carried out together. (11) The depth of sedation should be adjusted dynamically in the late stage of CC period. (12) Standardized sedation assessment is the premise of rational sedation. (13) Appropriate sedative drugs should be selected according to the objectives of sedation and drug characteristics. (14) A goal-directed minimization strategy for sedation should be implemented. (15) The principle of analgesia must be mastered first. (16) Subjective assessment is preferred for analgesia assessment. (17) Opioid-based analgesic strategies should be selected step-by-step according to the characteristics of different drugs. (18) There must be rational use of non-opioid analgesics and non-drug-based analgesic measures. (19) Pay attention to evaluation of the psychological status of CIPs. (20) Cognitive function in CIPs cannot be ignored. (21) Delirium management should be based on non-drug-based measures and rational use of drugs. (22) Reset treatment can be considered for severe delirium. (23) Psychological assessment should be conducted as early as possible to screen-out high-risk groups with post-traumatic stress disorder. (24) Emotional support, flexible visiting, and environment management are important components of humanistic management in the intensive care unit (ICU). (25) Emotional support from medical teams and families should be promoted through"ICU diaries"and other forms. (26) Environmental management should be carried out by enriching environmental content, limiting environmental interference, and optimizing the environmental atmosphere. (27) Reasonable promotion of flexible visitation should be done on the basis of prevention of nosocomial infection. (28) ESCAPE is an excellent project for late stage of CC management.
Humans
;
Consensus
;
Critical Care/methods*
;
Intensive Care Units
;
Pain/drug therapy*
;
Analgesics/therapeutic use*
;
Delirium/therapy*
;
Critical Illness
6.Protocol for the development of the Expert consensus on sedation and analgesia for neurocritical care patients (2023).
Shuya WANG ; Shuai LIU ; Shanshan XU ; Mengxue HOU ; Yuqing CHEN ; Linlin ZHANG ; Jianxin ZHOU ; Diseases THE NATIONAL CENTER FOR HEALTHCARE QUALITY MANAGEMENT IN NEUROLOGICAL ; Medicine CHINESE SOCIETY OF CRITICAL CARE ; Patients WORKING GROUP OF THE EXPERT CONSENSUS ON SEDATION AND ANALGESIA FOR NEUROCRITICAL CARE
Chinese Critical Care Medicine 2023;35(7):673-677
To further standardize the sedation and analgesia treatment for neurocritical care patients, the National Center for Healthcare Quality Management in Neurological Diseases and Chinese Society of Critical Care Medicine organized national experts in this fields to form Working group of the Expert consensus on sedation and analgesia for neurocritical care patients in order to update the Expert consensus on sedation and analgesia for patients with severe brain injury (2013) based on evidence-based medicine. This update aims to provide scientific guidance for the clinical diagnosis and treatment of neurocritical care patients. The working group followed the definition of clinical practice guidelines by the Institution of Medicine (IOM) and the World Health Organization guidelines development handbook and Guidelines for the formulation/revision of clinical guidelines in China (2022) to register and draft the Expert consensus on sedation and analgesia for neurocritical care patients. The working group will strictly adhere to the consensus development process to formulate and publish the Expert consensus on sedation and analgesia for neurocritical care patients (2023). This protocol primarily introduces the development methodology and process of the Expert consensus on sedation and analgesia for neurocritical care patients (2023), including the purpose of the update, the target population, the composition of the consensus development working group, the presentation and collection of clinical questions, evidence evaluation and summarization, and the generation of recommended opinions. This will make the consensus development process more standardized and transparent.
Humans
;
Consensus
;
Analgesia
;
Analgesics/therapeutic use*
;
Pain Management
;
Critical Care
7.Analgesic Activity of Jin Ling Zi Powder and Its Single Herbs: A Serum Metabonomics Study.
Cui-Fang WANG ; Xiao-Rong CAI ; Yan-Ni CHI ; Xiao-Yao MIAO ; Jian-Yun YANG ; Bing-Kun XIAO ; Rong-Qing HUANG
Chinese journal of integrative medicine 2022;28(11):1007-1014
OBJECTIVE:
To compare the analgesic effect of Jin Ling Zi Powder (JLZ) and its two single herbs.
METHODS:
The hot plate method was used to induce pain. Totally 36 mice were randomly divided into 6 groups by a complete random design, including control, model, aspirin (ASP, 0.14 g/kg body weight), JLZ (14 g/kg body weight), Corydalis yanhusuo (YHS, 14 g/kg body weight), and Toosendan Fructus (TF, 14 g/kg body weight) groups, 6 mice in each group. The mice in the control and model groups were given the same volume of saline, daily for 2 consecutive weeks. At 30, 60, 90, and 120 min after the last administration, the pain threshold of mice in each group was measured, and the improvement rate of pain threshold was calculated. Serum endogenous metabolites were analyzed by gas chromatography-mass spectrometry (GC-MS).
RESULTS:
There was no statistical difference in pain threshold among groups before administration (P>0.05). After 2 weeks of administration, compared with the model group, the pain threshold in JLZ, YHS, TF and ASP groups were increased to varying degrees (P<0.05). JLZ had the best analgesic effect and was superior to YHS and TF groups. A total of 14 potential biomarkers were screened in serum data analysis and potential biomarkers levels were all reversed to different degrees after the treatment with JLZ and its single herbs. These potential biomarkers were mainly related to glyoxylate and dicarboxylate metabolism, glycine, serine and threonine metabolism, valine, leucine and isoleucine biosynthesis, aminoacyl-tRNA biosynthesis and inositol phosphate metabolism.
CONCLUSIONS
The analgesic mechanism of JLZ and YHS was mainly due to the combination of glycine and its receptor, producing post-synaptic potential, reducing the excitability of neurons, and weakening the afferent effect of painful information.
Animals
;
Mice
;
Analgesics/therapeutic use*
;
Aspirin/pharmacology*
;
Biomarkers
;
Body Weight
;
Drugs, Chinese Herbal/therapeutic use*
;
Glycine
;
Glyoxylates
;
Inositol Phosphates
;
Isoleucine
;
Leucine
;
Metabolomics/methods*
;
Powders
;
RNA, Transfer
;
Serine
;
Threonine
;
Valine
8.Unique Pharmacology, Brain Dysfunction, and Therapeutic Advancements for Fentanyl Misuse and Abuse.
Ying HAN ; Lu CAO ; Kai YUAN ; Jie SHI ; Wei YAN ; Lin LU
Neuroscience Bulletin 2022;38(11):1365-1382
Fentanyl is a fully synthetic opioid with analgesic and anesthetic properties. It has become a primary driver of the deadliest opioid crisis in the United States and elsewhere, consequently imposing devastating social, economic, and health burdens worldwide. However, the neural mechanisms that underlie the behavioral effects of fentanyl and its analogs are largely unknown, and approaches to prevent fentanyl abuse and fentanyl-related overdose deaths are scarce. This review presents the abuse potential and unique pharmacology of fentanyl and elucidates its potential mechanisms of action, including neural circuit dysfunction and neuroinflammation. We discuss recent progress in the development of pharmacological interventions, anti-fentanyl vaccines, anti-fentanyl/heroin conjugate vaccines, and monoclonal antibodies to attenuate fentanyl-seeking and prevent fentanyl-induced respiratory depression. However, translational studies and clinical trials are still lacking. Considering the present opioid crisis, the development of effective pharmacological and immunological strategies to prevent fentanyl abuse and overdose are urgently needed.
Humans
;
Fentanyl/therapeutic use*
;
Opioid-Related Disorders/drug therapy*
;
Drug Overdose/prevention & control*
;
Analgesics, Opioid/adverse effects*
;
Vaccines/therapeutic use*
;
Brain
9.Clinical research and application of preemptive analgesia in dental treatment.
Chinese Journal of Stomatology 2022;57(5):490-494
Preemptive analgesia refers to the use of analgesics or regional nerve block in advance of nerve conduction changing or nerve remodeling caused by traumatic stimulation, so as to achieve better postoperative pain relief and to prevent postoperative pain hypersensitivity. Preemptive analgesia minimizes or prevents postoperative pain by reducing peripheral and central sensitization, which thereby limit the pain cascade. This paper briefly introduces the mechanism and methods of preemptive analgesia, as well as its application and research progress in the field of oral treatment. With the increased requirements for comfortable medical treatments and popularization of multimodal analgesia in pain management of oral surgery, preemptive analgesia will be more widely studied and applied in oral diagnosis and treatment.
Analgesia/methods*
;
Analgesics/therapeutic use*
;
Dental Care
;
Humans
;
Pain, Postoperative/prevention & control*
10.Effect of sequential sedation and analgesia in preventing delirium and withdrawal symptoms in children after ventilator weaning.
Wen-Hai YANG ; Zhi-Jun LAI ; Yan LI ; Ke-Ze MA
Chinese Journal of Contemporary Pediatrics 2022;24(7):748-752
OBJECTIVES:
To investigate the effect of sequential sedative and analgesic drugs in preventing delirium and withdrawal symptoms in children after ventilator weaning.
METHODS:
A retrospective analysis was performed on 61 children who were admitted and received mechanical ventilation support for ≥5 days in the Pediatric Intensive Care Unit of Dongguan Children's Hospital Affiliated to Guangdong Medical University from December 2019 to September 2021. The children were divided into a control group (30 children with no maintenance of analgesic and sedative drugs after ventilator weaning) and an observation group (31 children with sequential sedative and analgesic drugs maintained for 48 hours after ventilator weaning). The two groups were compared in terms of the Sophia Observation Withdrawal Symptoms Scale (SOS) score, the Pediatric Delirium Scale (PD) score, the Richmond Agitation-Sedation Scale (RASS) score, and the incidence rates of delirium or withdrawal symptoms at 24 and 72 hours after ventilator weaning.
RESULTS:
There was no significant difference in the incidence rate of delirium at 24 hours and 72 hours after ventilator weaning between the two groups (P>0.05). Compared with the control group, the observation group had significantly lower incidence rate of withdrawal symptoms and scores of SOS, PD, and RASS scales at 24 hours and 72 hours after ventilator weaning (P<0.01).
CONCLUSIONS
Sequential sedation and analgesia after ventilator weaning can reduce the incidence of withdrawal symptoms within 72 hours after ventilator weaning, but it cannot reduce the incidence rate of delirium.
Analgesia
;
Analgesics/therapeutic use*
;
Child
;
Delirium/prevention & control*
;
Humans
;
Hypnotics and Sedatives/therapeutic use*
;
Intensive Care Units, Pediatric
;
Pain
;
Prospective Studies
;
Respiration, Artificial/adverse effects*
;
Retrospective Studies
;
Substance Withdrawal Syndrome/prevention & control*
;
Ventilator Weaning

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