Chronic post-surgical pain following gastrointestinal surgery: Protocol for a scoping review.

BACKGROUND: Chronic post-surgical pain (CPSP) significantly impacts people's lives, affecting both socioeconomic aspects as well as their rehabilitation after surgery. Yet, CPSP remains an under-researched field. The prevalence varies depending on type of surgery, which highlights the importance of surgery-specific research. This scoping review aims to investigate CPSP following gastrointestinal surgery in order to map out incidences, risk factors, and impact on quality of life (QoL) as well as identify gaps in research. METHODS: The planned review will follow the Preferred Reporting Items for Systematic review and Meta-Analyses (PRISMA) for Scoping Review guidelines. A search strategy will be carried out in major peer-reviewed databases and grey literature will be sought and identified. We will include original studies assessing CPSP after gastrointestinal surgery, with the exception of hernia surgery. We will chart data regarding trial characteristics, patient demographic, surgical diagnosis, risk factors, follow-up times, pain definitions and evaluations as well as impact on QoL. RESULTS: We will present the included studies with a narrative summary, supplemented with descriptive statistics of the quantitative data if appropriate. CONCLUSION: The planned scoping review will map out the current evidence about CPSP in adults following gastrointestinal surgery. We will identify gaps in research that can support the development of further research into CPSP after gastrointestinal surgery.

Prognostic factors of chronic postsurgical pain following gastrointestinal surgery: A systematic review protocol.

BACKGROUND: Chronic postsurgical pain (CPSP) presents a considerable healthcare challenge, impacting patients, and healthcare providers, particularly in the context of gastrointestinal surgery. The notable incidence of CPSP in this specific surgical domain emphasizes the need to identify patients with a high risk of developing this condition. Despite various studies exploring this topic, a comprehensive systematic review focusing on prognostic factors of CPSP following gastrointestinal surgery is currently lacking. Therefore, the aim of this systematic review is, through systematically examination of existing literature, to assess both established and potentially novel prognostic factors, associated with CPSP following gastrointestinal surgery. METHODS: Adhering to the Cochrane Handbook and the Preferred Reporting Items for Systematic review and Meta-Analysis Protocols (PRISMA-P) checklist, we will use pre-established criteria based on Population, Intervention, Comparator, Outcome, Timing, and Setting (PICOT-S), to determine eligibility for inclusion. Essentially, this entails studies reporting on prognostic factors of CPSP following gastrointestinal surgery. Relevant studies will be identified through systematic searches in medical databases, examination of reference lists from included studies, and screening of Clinicaltrials.gov. No restrictions will be imposed regarding language, publication time or source, and both randomized trials and observational studies will be included. Data extraction will follow the Checklist for Critical Appraisal and Data Extraction for Systematic Reviews of prognostic factor studies (CHARMS-PF) and for quality assessment, we will use the Quality in Prognosis Studies (QUIPS) tool. RESULTS: The aim for the systematic review is to identify and assess the prognostic value of potential factors for the development of CPSP following gastrointestinal surgery. CONCLUSION: By creating a comprehensive overview of important prognostic factors for the development of CPSP following gastrointestinal surgery, the findings of this systematic review have the potential to guide future research and to enhance patient information resources.

The clinical role of remimazolam: Protocol for a scoping review.

BACKGROUND: Remimazolam, a novel benzodiazepine, shows promise as an alternative to traditional sedatives and hypnotic agents in procedural sedation and general anaesthesia. While preliminary research indicates potential advantages over conventional agents, such as faster onset, predictable duration, and improved safety profile, the extent and quality of existing evidence remain unclear. This scoping review aims to investigate the current clinical role of remimazolam and provide a broad and comprehensive overview. METHODS: The proposed review will adhere to the JBI methodology for scoping reviews and the Preferred Reporting Items for Systematic Review and Meta-Analysis for Scoping Reviews. A comprehensive search will be conducted across major peer-reviewed databases and grey literature will be sought. All studies involving individuals undergoing procedural sedation or general anaesthesia with remimazolam will be eligible. Data extraction will encompass trial and participant characteristics, intervention details, reported outcomes, comparative efficacy versus midazolam and propofol, patient and operator experience and economic costs. RESULTS: We will provide a descriptive summary supplemented by statistics, figures and tables where applicable. CONCLUSION: The outlined scoping review aims to assess the clinical use of remimazolam in procedural sedation and as the hypnotic component of general anaesthesia. The review will map the current body of evidence of remimazolam and identify knowledge gaps, contributing to understanding its clinical implications and guiding future research efforts in procedural sedation and general anaesthesia.

Risk prediction models in emergency surgery: Protocol for a scoping review.

BACKGROUND: Risk prediction models are used for many purposes in emergency surgery, including critical care triage and benchmarking. Several risk prediction models have been developed, and some are used for purposes other than those for which they were developed. We aim to provide an overview of the existing literature on risk prediction models used in emergency surgery and highlight knowledge gaps. METHODS: We will conduct a scoping review on risk prediction models used for patients undergoing emergency surgery in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR). We will search Medline, EMBASE, and the Cochrane Library and include all study designs. We aim to answer the following questions: (1) What risk prediction models are used in emergency surgery? (2) Which variables are used in these models? (3) Which surgical specialties are the models used for? (4) Have the models been externally validated? (5) Where have the models been externally validated? (6) What purposes were the models developed for? (7) What are the strengths and limitations of the included models? We will summarize the results descriptively. The certainty of evidence will be evaluated using a modified Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. CONCLUSION: The outlined scoping review will summarize the existing literature on risk prediction models used in emergency surgery and highlight knowledge gaps.

Relatives' influence on the treatment of acutely critically ill patients in prehospital emergency medicine: a qualitative study of healthcare professionals' experiences and attitudes.

BACKGROUND: Family presence during resuscitation is a growing topic in the field of prehospital emergency medicine. Emergency medicine service (EMS) providers interact with the relatives of acutely critically ill patients daily. Previous studies have found varying preferences towards family presence during resuscitation. Some EMS providers experience family presence affects patient treatment. The study aimed to gain insight into how EMS providers experience relatives of critically ill patients influence patient treatment. METHODS: We used semi-structured individual interviews of specially trained paramedics and anaesthetists specialised in prehospital emergency medicine. A total of 11 interviews were conducted at a University Hospital in Copenhagen. Inductive qualitative contents analysis was used to analyse the data. RESULTS: Relatives were defined as family, spouses, children, partners, close friends or colleagues, and, for some participants, more peripheral relationships such as schoolmates or acquaintances. We identified four themes, describing how EMS providers experience relatives' influence on patient treatment: 'supporting optimal patient treatment', 'futile resuscitation', 'negative impact on patient treatment', and 'the paediatric patient'. CONCLUSIONS: Our study illustrates how EMS providers experience that treatment is influenced by relatives of acutely critically ill patients in the prehospital emergency medicine setting. Relatives can help or challenge treatment, and also influence EMS providers' clinical decision-making. Our findings can guide those working in prehospital emergency medicine towards utilising relatives of critically ill patients and increasing our understanding of how relatives can influence EMS providers' treatment and their clinical decision-making. Future studies should seek to quantify relatives' effect on treatment and investigate the clinical and ethical aspects of futile resuscitation.

Goal-directed fluid therapy in emergency abdominal surgery: a randomised multicentre trial.

BACKGROUND: More than 50% of patients have a major complication after emergency gastrointestinal surgery. Intravenous (i.v.) fluid therapy is a life-saving part of treatment, but evidence to guide what i.v. fluid strategy results in the best outcome is lacking. We hypothesised that goal-directed fluid therapy during surgery (GDT group) reduces the risk of major complications or death in patients undergoing major emergency gastrointestinal surgery compared with standard i.v. fluid therapy (STD group). METHODS: In a randomised, assessor-blinded, two-arm, multicentre trial, we included 312 adult patients with gastrointestinal obstruction or perforation. Patients in the GDT group received i.v. fluid to near-maximal stroke volume. Patients in the STD group received i.v. fluid following best clinical practice. Postoperative target was 0-2 L fluid balance. The primary outcome was a composite of major complications or death within 90 days. Secondary outcomes were time in intensive care, time on ventilator, time in dialysis, hospital stay, and minor complications. RESULTS: In a modified intention-to-treat analysis, we found no difference in the primary outcome between groups: 45 (30%) (GDT group) vs 39 (25%) (STD group) (odds ratio=1.24; 95% confidence interval, 0.75-2.05; P=0.40). Hospital stay was longer in the GDT group: median (inter-quartile range), 7 (4-12) vs 6 days (4-8.5) (P=0.04); no other differences were found. CONCLUSION: Compared with pressure-guided i.v. fluid therapy (STD group), flow-guided fluid therapy to near-maximal stroke volume (GDT group) did not improve the outcome after surgery for bowel obstruction or gastrointestinal perforation but may have prolonged hospital stay. CLINICAL TRIAL REGISTRATION: EudraCT number 2015-000563-14; the Danish Scientific Ethics Committee and the Danish Data Protection Agency (REG-18-2015).

Peripheral nerve block anaesthesia and postoperative pain in acute ankle fracture surgery: the AnAnkle randomised trial.

BACKGROUND: Peripheral nerve blocks (PNBs) are increasingly popular in acute ankle fracture surgery but rebound pain may outweigh the benefits. The AnAnkle Trial was designed to assess the postoperative pain profile of PNB anaesthesia compared with spinal anaesthesia (SA). METHODS: The AnAnkle Trial was a randomised, two-centre, blinded outcome analysis trial. Eligible adults booked for primary ankle fracture surgery were randomised to PNB or SA. The PNBs were ultrasound-guided popliteal sciatic and saphenous blocks with ropivacaine and SAs were with hyperbaric bupivacaine. Postoperatively, all subjects received paracetamol, ibuprofen, and patient-controlled i.v. morphine for pain. The primary endpoint was 27 h Pain Intensity and Opioid Consumption (PIOC) score. Secondary endpoints included longitudinal pain scores and morphine consumption separately, and questionnaires on quality of recovery. RESULTS: This study enrolled 150 subjects, and the PNB success rate was >94%. PIOC was lower with PNB anaesthesia (median, -26.5% vs +54.3%; P<0.001) and the probability of a better PIOC score with PNB than with SA was 74.8% (95% confidence interval, 67.0-82.6). Pain scores and morphine consumption analysed separately also yielded a clear benefit with PNB, despite substantial rebound pain when PNBs subsided. Quality of recovery scores were similar between groups, but 99% having PNB vs 90% having SA would choose the same anaesthesia form again (P=0.03). CONCLUSIONS: PNB anaesthesia was efficient and provided a superior postoperative pain profile compared with SA for acute ankle fracture surgery, despite potentially intense rebound pain after PNB. CLINICAL TRIAL REGISTRATION: Clinicaltrialsregister.eu, EudraCT number: 2015-001108-76.

Ischaemic vascular disease and long-term mortality in emergency abdominal surgical patients: A population-based cohort study.

BACKGROUND: Emergency abdominal surgery carries a high mortality, as patients are often frail with significant comorbidity. We aimed to evaluate the association between co-existing ischaemic vascular disease (IVD) and long-term mortality in patients undergoing emergency abdominal surgery. METHODS: We included adult emergency abdominal surgical patients operated on 13 Danish hospitals between 1 January 2009 and 31 December 2010. Appendectomies were excluded. Data were retrieved from the National Patient Registry (NPR) and the Danish Anaesthesia Database. Preoperative IVD status was retrieved from NPR. We used crude and adjusted Cox regression analysis. The primary outcome was mortality within eight years. The secondary outcome was mortality within 30 days. RESULTS: We included 4864 patients, of which 2584 (53.7%) died within 8 years. Some 20.9% (1019/4864) had preoperative IVD. The adjusted association between preoperative IVD and mortality within 8 years was hazard ratio (HR) 1.10 (95% confidence interval [CI], 1.00-1.20; P = .045). At 30 days, this association was HR 0.97 (95% CI, 0.84-1.13). CONCLUSION: In adult major emergency abdominal surgical patients, preoperative IVD was prevalent and associated with a 10% relative increase in long-term mortality, but not in short-term mortality.

Clinical considerations for reposition of a dislocated hip: A qualitative study.

BACKGROUND: A well-known complication of having hip alloplasty surgery is dislocation of the prothesis. This affects 2%-4% of the patients, and 75% of the dislocations occur within the first year after surgery. The aim of our study was to gain knowledge about the clinical considerations underlying the choice of anaesthesia for, and treatment of, patients with dislocated hips by specialists in anaesthesiology and orthopaedic surgery. METHODS: We used semi-structured group interviews of specialists in anaesthesiology and orthopaedic surgery. An interview guide was developed and pilot tested before the group interviews. In total, 25 specialists participated, recruited from two university hospitals in Denmark. Data saturation was reached after seven group interviews. Inductive content analysis was used in the data analysis. RESULTS: We identified four overall themes, describing essential considerations made by the specialists: "Adhering to the principle of minimal intervention", "Ensuring patient safety through optimal working conditions", "Organisational considerations" and "Pain induced gastric retention". CONCLUSION: Our study illustrates different clinical considerations made by specialists in anaesthesiology and orthopaedic surgery in relation to the treatment of patients with dislocated hips. Our results hope to promote mutual understanding in joint clinical decision-making in relation to patients with dislocated hips as well as to inspire less-experienced anaesthesiologists and orthopaedic surgeons. Additionally, our results suggest a set of "rules of thumb" for how jointly to decide on the repositioning site of the patient during the procedure.

APACHE II score validation in emergency abdominal surgery. A post hoc analysis of the InCare trial.

BACKGROUND: Patients undergoing emergency abdominal surgery are at high risk of morbidity and mortality. Accurate identification of high-risk patients is important. The Acute Physiology and Chronic Health Evaluation (APACHE) II score needs to be validated in a larger heterogeneous population before implementation. We aimed to assess the predictive value of the APACHE II score in emergency abdominal surgical patients. Furthermore, we compared the APACHE II score with the American Society of Anesthesiologists (ASA) physical status score and the Charlson Comorbidity Index (CCI). METHODS: We included adult patients undergoing emergency abdominal surgery screened for enrolment in the InCare trial from October 2010 to November 2012. The APACHE II score was evaluated with area under the receiver operating characteristics curve (AUROC) statistics. The primary outcome was 30-day mortality. Secondary outcomes included 90-day mortality and admission to the intensive care unit. RESULTS: We included a total of 885 patients. All-cause 30-day mortality was 5.0%, 90-day mortality was 8.9%, and a total of 7.9% of the patients were admitted to the intensive care unit. The AUROC (95% confidence interval) of the APACHE II score was 0.72 (0.65-0.80) for 30-day mortality, 0.70 (0.64-0.76) for 90-day mortality and 0.65 (0.59-0.71) for admission to the intensive care unit. The CCI performed better in prediction of 90-day mortality (P = .04). All other results for the ASA score and CCI were comparable with the APACHE II score. CONCLUSION: The APACHE II score predicted mortality moderately and admission to intensive care unit poorly in emergency abdominal surgical patients.

Long-term mortality in the Intermediate care after emergency abdominal surgery (InCare) trial-A post-hoc follow-up study.

BACKGROUND: Patients undergoing emergency abdominal surgery are at high risk of post-operative complications. Although post-operative treatment at an intermediate care unit may improve early outcome, there is a lack of studies on the long-term effects of such therapy. The aim of this study was to assess the long-term effect of intermediate care versus standard surgical ward care on mortality in the Intermediate Care After Emergency Abdominal Surgery (InCare) trial. METHODS: We included adult patients undergoing emergency major laparoscopy or laparotomy with an Acute Physiology and Chronic Health Evaluation (APACHE) II score of 10 or more, who participated in the InCare trial from October 2010 to November 2012. In the InCare trial, patients were randomized to either post-operative intermediate care or standard surgical ward care. The primary outcome was time to death within 6 years after surgery. We assessed mortality with Coxregression analysis. RESULTS: A total of 286 patients were included. The all-cause 6-year landmark mortality was 52.8% (76 of 144 patients) in the intermediate care group and 47.9% (68 of 142 patients) in the ward care group. There was no statistically significant difference in mortality risk between the two groups (hazard ratio 1.06 (95% confidence interval 0.76-1.47), P = .73). CONCLUSION: We found no statistically significant difference in 6-year mortality between patients randomized to post-operative intermediate care or ward care after emergency abdominal surgery. However, we detected an absolute mortality risk reduction of 5% in favour of ward care, possibly due to random error.

Diagnosis and outcome of acute respiratory failure in immunocompromised patients after bronchoscopy.

OBJECTIVE: We wished to explore the use, diagnostic capability and outcomes of bronchoscopy added to noninvasive testing in immunocompromised patients. In this setting, an inability to identify the cause of acute hypoxaemic respiratory failure is associated with worse outcome. Every effort should be made to obtain a diagnosis, either with noninvasive testing alone or combined with bronchoscopy. However, our understanding of the risks and benefits of bronchoscopy remains uncertain. PATIENTS AND METHODS: This was a pre-planned secondary analysis of Efraim, a prospective, multinational, observational study of 1611 immunocompromised patients with acute respiratory failure admitted to the intensive care unit (ICU). We compared patients with noninvasive testing only to those who had also received bronchoscopy by bivariate analysis and after propensity score matching. RESULTS: Bronchoscopy was performed in 618 (39%) patients who were more likely to have haematological malignancy and a higher severity of illness score. Bronchoscopy alone achieved a diagnosis in 165 patients (27% adjusted diagnostic yield). Bronchoscopy resulted in a management change in 236 patients (38% therapeutic yield). Bronchoscopy was associated with worsening of respiratory status in 69 (11%) patients. Bronchoscopy was associated with higher ICU (40% versus 28%; p<0.0001) and hospital mortality (49% versus 41%; p=0.003). The overall rate of undiagnosed causes was 13%. After propensity score matching, bronchoscopy remained associated with increased risk of hospital mortality (OR 1.41, 95% CI 1.08-1.81). CONCLUSIONS: Bronchoscopy was associated with improved diagnosis and changes in management, but also increased hospital mortality. Balancing risk and benefit in individualised cases should be investigated further.

Rebound pain following peripheral nerve block anaesthesia in acute ankle fracture surgery: An exploratory pilot study.

BACKGROUND: Peripheral nerve blocks (PNB) are increasingly used for anaesthesia and postoperative pain control in acute orthopaedic limb surgery but rebound pain upon cessation of PNBs may challenge the benefits on the pain profile. We aimed to explore the pain profile following acute ankle fracture surgery under PNB anaesthesia and investigate if rebound pain could pose a clinical problem. METHODS: Exploratory, observational study of adults scheduled for acute primary internal fixation of an ankle fracture under ultrasound-guided popliteal sciatic and saphenous ropivacaine block anaesthesia. Postoperatively, patients regularly registered pain scores while receiving a fixed analgesics regimen and patient controlled morphine on-demand. We analysed morphine consumption and depicted the detailed pain profiles as graphs allowing for visual analysis of pain courses, including rebound pain. Secondly, we compared the area under the curve and peak pain between relevant age-subgroups. RESULTS: We included 21 patients aged 20-83. Depicted pain profiles reveal that PNB supplied effective and long lasting postoperative pain control, but cessation of the PNB led to intense rises in pain scores with six out of nine 20-60-year-olds reaching severe pain levels. The rebound was less pronounced in patients >60 years old, but nearly all reached moderate pain levels. Morphine consumption rates were high during the rebound. CONCLUSIONS: This study thoroughly analyses the post-PNB pain profile and suggests rebound pain is a clinically relevant and problematic issue with the potential to outweigh the PNB benefits, especially for younger patients. The conclusions are tentative, and a randomised study is pending.

Health-related quality of life after robotic-assisted laparoscopic hysterectomy for women with endometrial cancer--A prospective cohort study.

OBJECTIVE: The aim of this prospective cohort study using patient-reported outcome measures (PROMs) was to detect short term changes in functioning, symptoms and health-related quality of life (HRQoL) after robotic-assisted laparoscopic hysterectomy (RALH) for endometrial cancer or atypical complex hyperplasia. METHODS/MATERIALS: A total of 139 women answered the EORTC C-30, EN-24 and EQ-5D-3L preoperatively (baseline) by face to face interview and again 1 week, 5 weeks and 4 months postoperatively by telephone interview. The women furthermore reported their level of activity compared to their habitual level in a diary during the first 5 weeks after surgery. RESULTS: We found a clinically relevant decrease in HRQoL after 1 week. At 5 weeks postoperatively, HRQoL was again at the preoperative level. Fatigue, pain, constipation, gastrointestinal symptoms, and appetite were all negatively affected 1 week postoperatively, but back to baseline level at 5 weeks. Ability to perform work or hobbies and change of taste were still affected at 5 weeks. CONCLUSIONS: HRQoL and postoperative symptoms were overall back to the preoperative level 5 weeks after RALH. These findings indicate fatigue, pain, constipation, gastrointestinal symptoms, appetite, ability to perform work and hobbies, change of taste and sexually related problems should be addressed in future research and in the pre- and postoperative care for women undergoing RALH.

Cost-analysis of robotic-assisted laparoscopic hysterectomy versus total abdominal hysterectomy for women with endometrial cancer and atypical complex hyperplasia.

INTRODUCTION: The aim of this study was to analyse the hospital cost of treatment with robotic-assisted laparoscopic hysterectomy and total abdominal hysterectomy for women with endometrial cancer or atypical complex hyperplasia and to identify differences in resource use and cost. MATERIAL AND METHODS: This cost analysis was based on two cohorts: women treated with robotic-assisted laparoscopic hysterectomy (n = 202) or with total abdominal hysterectomy (n = 158) at Copenhagen University Hospital, Herlev, Denmark. We conducted an activity-based cost analysis including consumables and healthcare professionals' salaries. As cost-drivers we included severe complications, duration of surgery, anesthesia and stay at the post-anesthetic care unit, as well as number of hospital bed-days. Ordinary least-squares regression was used to explore the cost variation. The primary outcome was cost difference in Danish kroner between total abdominal hysterectomy and robotic-assisted laparoscopic hysterectomy. RESULTS: The average cost of consumables was 12,642 Danish kroner more expensive per patient for robotic-assisted laparoscopic hysterectomy than for total abdominal hysterectomy (2014 price level: 1€ = 7.50 Danish kroner). When including all cost-drivers, the analysis showed that the robotic-assisted laparoscopic hysterectomy procedure was 9386 Danish kroner (17%) cheaper than the total abdominal hysterectomy (p = 0.003). When the robot investment was included, the cost difference reduced to 4053 Danish kroner (robotic-assisted laparoscopic hysterectomy was 7% cheaper than total abdominal hysterectomy) (p = 0.20). Increasing age and Type 2 diabetes appeared to influence the overall costs. CONCLUSION: For women with endometrial cancer or atypical complex hyperplasia, robotic-assisted laparoscopic hysterectomy was cheaper than total abdominal hysterectomy, mostly due to fewer complications and shorter length of hospital stay.

Transversus abdominis plane block after laparoscopic colonic resection in cancer patients: A randomised clinical trial.

BACKGROUND: A key point in pathways for optimal rehabilitation and enhanced recovery is an effective postoperative multimodal pain treatment regimen. OBJECTIVE: To investigate the analgesic effects of transversus abdominis plane (TAP) block in conjunction with paracetamol and ibuprofen in patients undergoing laparoscopic colonic resection. DESIGN: Randomised placebo-controlled double-blind study. SETTING: Herlev University Hospital, Copenhagen, Denmark, from March 2010 to February 2013. PATIENTS: Eighty adult patients scheduled for elective laparoscopic colectomy. INTERVENTIONS: Bilateral TAP block with 20 ml of either ropivacaine or isotonic saline. MAIN OUTCOME MEASURES: Visual analogue scale (VAS) pain scores (0 to 100 mm) while coughing at 6 h after surgery (primary outcome). Secondary outcomes were area under the curve pain scores (2 to 24 h) at rest and while coughing, 24-h morphine consumption and incidence of nausea and vomiting. RESULTS: VAS pain scores at 6 h while coughing was not different between groups (median, interquartile range), TAP, 27 (11 to 45) mm vs. placebo, 33 (20 to 49) mm (P = 0.20). Total 24-h morphine consumption was reduced in the TAP block group vs. placebo group, 30 (15 to 41) mg vs. 43 (30 to 67) mg, respectively (P = 0.008). This difference was most pronounced in the first postoperative hours. The remaining outcomes did not differ between groups. CONCLUSION: TAP block used in combination with paracetamol and ibuprofen did not reduce pain after laparoscopic colonic surgery. However, we found a 30% reduction in opioid use, most marked in the early postoperative period. TRIAL REGISTRATION: www.clinicaltrials.gov (NCT01418144).

Effect of Ultrasound-Guided Placement of Difficult-to-Place Peripheral Venous Catheters: A Prospective Study of a Training Program for Nurse Anesthetists.

Patients with difficult intravenous access (DIVA) often experience discomfort because of failed attempts to place peripheral venous catheters (PVCs); however, ultrasound guidance may improve this problem with catheter placement. The aim of this study was to evaluate the use of ultrasound when operated by nurse anesthetists for these patients. This prospective observational study with a pre/post design focused on inpatients with DIVA referred for PVC placement, a service provided by nurse anesthetists in most Scandinavian hospitals. The rate of success, procedure time, number of skin punctures, discomfort, catheter size, location, and incidence of central venous catheter placement are reported before and after implementation of a training program and a mobile service using ultrasound to place difficult-to-place PVCs. The success rate increased from 0% (0 of 33 patients) to 83% (58 of 70 patients) with ultrasound. Procedure time was reduced from 20 to 10 minutes, discomfort was unchanged, and the median number of skin punctures decreased from 3 to 2. The incidence of central venous catheter placement dropped from 34% to 7%. Implementation of a training program and a mobile service in which nurse anesthetists performed ultrasound-guided PVC placement improved the success rate and quality of care in patients with DIVA.

The association of perioperative dexamethasone, smoking and alcohol abuse with wound complications after laparotomy.

BACKGROUND: A number of perioperative risk factors may suppress the immune system and contribute to the development of post-operative complications. The association between surgical site infection (SSI) and other wound-related complications resulting from immunosuppression through either perioperative administration of dexamethasone, pre-operative smoking or alcohol abuse is, however, uncertain. METHODS: This study was a post hoc analysis of data from the PROXI randomized trial in 1386 patients who underwent emergency or elective laparotomy. We assessed the associations of use of dexamethasone, smoking status and alcohol abuse with the primary outcome, being a composite of SSI, anastomotic leak, wound dehiscence, burst abdomen and 30-day mortality. RESULTS: The primary outcome occurred in 21% of patients receiving dexamethasone versus 28% of patients not receiving dexamethasone, and this was not statistically significant when adjusting for stratification variables originally used in the PROXI trial [OR 0.90, 95% CI (0.65-1.24)]. In smokers, the primary outcome occurred in 32%, compared with 23% of non-smokers (P = 0.0001). Smokers also had a higher frequency of SSI (25% vs 17%, P < 0.0001) and burst abdomen (3.8% vs 2.4%, P = 0.04). In alcohol abusers, the primary outcome occurred in 48%, compared with 25% in patients who did not abuse alcohol (P = 0.0006). Burst abdomen occurred more commonly in alcohol abusers (15% vs 2.3%, P < 0.0001). CONCLUSION: Perioperative administration of dexamethasone was not significantly associated with SSI or other wound-related complications. Conversely, smoking and alcohol abuse were both significant predictors of the primary outcome consisting of wound-related complications and mortality.

The association of the perioperative fluid balance and cardiopulmonary complications in emergency gastrointestinal surgery: exploration of a randomized trial.

BACKGROUND: The association between perioperative fluid administration and risk of complications following emergency surgery is poorly studied. We tested the association between the perioperative fluid balance and postoperative complications following emergency surgery for gastrointestinal obstruction or perforation. METHODS: We performed a re-assessment of data from the Goal-directed Fluid Therapy in Urgent Gastrointestinal Surgery Trial (GAS-ART) studying intra-operative stroke volume optimization and postoperative zero-balance fluid therapy versus standard fluid therapy. The cohort was divided into three groups at a perioperative fluid balance (FB) of low < 0 L, moderate 0-2 L, or high > 2 L. We used a propensity adjusted logistic regression to analyse the association with cardiopulmonary (primary outcome), renal, infectious, and wound healing complications. Further, the risk of complications was explored on a continuous scale of the FB. RESULTS: We included 303 patients: 44 patients belonged to the low-FB group, 108 to the moderate-FB group, and 151 to the high-FB group. The median [interquartile range] perioperative FB was -0.9 L [-1.4, -0.6], 0.9 L [0.5, 1.3], and 3.8 L [2.7, 5.3]. The risk of cardiopulmonary complications was significantly higher in the High-FB group 3.4 (1.5-7.6), p = 0.002 (odds ratio (95% confidence interval). On a continuous scale of the fluid balance, the risk of cardiopulmonary complications was minimal at -1 L to 1 L. CONCLUSION: Following emergency surgery for gastrointestinal obstruction or perforation, a fluid balance < 2.0 L was associated with decreased risk of cardiopulmonary complications without increasing renal complications.

Potentially toxic concentrations in blood of total ropivacaine after bilateral transversus abdominis plane blocks; a pharmacokinetic study.

CONTEXT: Elevated blood levels of lidocaine and ropivacaine have been described after transversus abdominis plane (TAP) block. OBJECTIVE: To investigate the pharmacokinetic profile of ropivacaine after bilateral TAP blocks. DESIGN: Prospective observational pharmacokinetic study. SETTING: University teaching hospital in Copenhagen, Denmark. PATIENTS: Twenty-one adult patients presenting for abdominopelvic surgery with bilateral TAP blocks were enrolled. PROCEDURES: Ultrasound-guided TAP blocks with bilateral injections of 20 ml ropivacaine 0.5% w/v (total dose 200 mg). Blood was sampled at 0, 10, 30 and 60 min after TAP blocks. MEASURES: Total and free peak blood concentrations (Cmax) of ropivacaine. RESULTS: Data were analysed from N = 18 patients. The median dose of ropivacaine was 2.7 mg kg(-1) (range: 1.9-4.2 mg kg(-1)). Median total ropivacaine concentrations were 1.0, 1.6 and 1.7 µg ml(-1) at 10, 30 and 60 min, respectively. Six patients (33%) had Cmax values above 2.2 µg ml(-1) and the highest concentration measured was 5.1 µg ml(-1). One patient had a 33% drop in mean arterial blood pressure. CONCLUSION: TAP blocks with bilateral injections of 20 ml ropivacaine 0.5% w/v gave rise to potentially toxic peak blood concentrations of total ropivacaine in one-third of the patients.