OOIR: Observatory of International Research

Papers

(The TQCC of Perioperative Medicine is 5. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2022-06-01 to 2026-06-01.)

Article	Citations
Frailty in the over 65’s undergoing elective surgery (FIT-65) – a three-day study examining the prevalence of frailty in patients presenting for elective surgery	60
Perioperative anesthesia management of GLP-1 receptor agonists: a systematic review of potential risks	35
Intraoperative findings and predictors for length of hospital stay among elderly patients undergoing emergency exploratory laparotomy: a multi-centre prospective study	33
The impact of preoperative stroke on 1-year mortality and days at home alive after major surgery: an observational cohort study	27
Preoperative neutrophil–to–lymphocyte ratio after chemoradiotherapy for esophageal squamous cell carcinoma associates with postoperative pulmonary complications following radical esophagectomy	26
A comparison of ClearSight noninvasive cardiac output and pulmonary artery bolus thermodilution cardiac output in cardiac surgery patients	26
The effect of abdominal massage applied after surgery on gastrointestinal symptoms and comfort level	26
Antibiotic prophylaxis in emergency cholecystectomy for mild to moderate acute cholecystitis: a systematic review and meta-analysis of randomized controlled trials	20
Cardiopulmonary exercise testing before and after intravenous iron in preoperative patients: a prospective clinical study	20
Effect of butorphanol nasal spray administration on patient cooperativity during labor epidural placement: a single-center randomized controlled trial	18
Efficacy and safety of perioperative use of non-steroidal anti-inflammatory drugs for preemptive analgesia in lumbar spine surgery: a systematic review and meta-analysis	18
Perioperative bronchoaspiration in a semaglutide user on a residue-free diet: a case report and insights from a complication	17
Use of colloids and crystalloids for perioperative clinical infusion management in cardiac surgery patients and postoperative outcomes: a meta-analysis	16
Hypotension prediction index for prevention of intraoperative hypotension in patients undergoing general anesthesia: a randomized controlled trial	16
Postoperative and postdischarge nausea and vomiting following ambulatory eye, head, and neck surgeries: a retrospective cohort study comparing incidence and associated factors	16
Effect of age and gender on pre-operative cardiovascular risk assessment	16
Preeclamptic heart failure — perioperative concerns and management: a narrative review	16
Effect of transversus abdominis plane block versus intravenous hydromorphone on the quality of postoperative recovery in elderly critically Ill patients in the SICU: a single-center, single-blind, ran	16
Refining postoperative quality metrics: risk factors for emergency department visits within 3 days after hemorrhoidectomy	15
Post-surgical DKA stems from poor glycemic control prior to surgery and perioperative catecholamine usage: unmatched case–control study	15
Postoperative short-term use of the nonsteroidal anti-inflammatory drug flurbiprofen did not increase the anastomotic leakage rate in patients undergoing elective gastrointestinal surgery—a retrospect	15
Magnitude of early postoperative hypoxemia and its associated factors among adult patients who undergo emergency surgery under general anesthesia at Jimma Medical Center, Jimma, Southwest Ethiopia, 20	14
Simplified rapid hydration and contrast-associated acute kidney injury among CKD patients stratified by Mehran score: sub-analysis from the TIME Trial	14
RAPID-CHD pathway improves clinical outcomes in neonates with congenital heart disease	14
Higher rate of undetected intraoperative damage of latex-free surgical gloves worn by scrub nurses	14

A comparative study on the effect of dopamine vs phenylephrine in improving the cutaneous analgesic effect of mexiletine in rats	14
Preoperative moderate to severe anemia is associated with increased postoperative major adverse cardiac and cerebral events and pulmonary complications: a propensity score-matched analysis in hip frac	13
Evaluation of fluid responsiveness with dynamic superior vena cava collapsibility index in mechanically ventilated patients	13
Prehabilitation for patients with colorectal cancer: a snapshot of current daily practice in Dutch hospitals	12
The effect of restrictive vs. liberal fluid protocols on ocular parameters in patients undergoing prone spine surgery: a randomized controlled trial	12
Influence of portal hypertension-associated upper gastrointestinal bleeding and acute kidney injury on liver transplantation prognosis	12
Synthetic colloids as priming fluids in cardiopulmonary bypass and postoperative acute kidney injury: a propensity score-matched study	11
Prehabilitation in high-risk patients scheduled for major abdominal cancer surgery: a feasibility study	11
Outpatient compared to inpatient thyroidectomy on 30-day postoperative outcomes: a national propensity matched analysis	11
Relationship between endotoxin core and staphylococcal antibody levels and outcome following transcatheter aortic valve implantation (TAVI)	10
Intraoperative mild hyperoxia may be associated with improved survival after off-pump coronary artery bypass grafting: a retrospective observational study	10
Application of high-flow nasal oxygen during anesthesia induction for frame-based stereoelectroencephalography: a randomized controlled non-inferiority trial	10
Nomogram for predicting the risk of postoperative delirium in elderly patients undergoing orthopedic surgery	10
Evaluating a pre-surgical health optimisation programme: a feasibility study	10
Hemolysis during open heart surgery in patients with hereditary spherocytosis — systematic review of the literature and case study	10
Treatment of iron deficiency in patients scheduled for pancreatic surgery: implications for daily prehabilitation practice in pancreatic surgery	10
Perioperative remimazolam administration to prevent delirium and neurocognitive disorders after surgery: a systematic review and meta-analysis	9
Analgesic efficacy and safety of methylene blue combined with cocktail for periarticular infiltration following total knee arthroplasty: a prospective, randomized, controlled study	9
Rethinking ejection fraction for anesthesiologists: a narrative review	9
Enhanced recovery after caesarean section: an intrathecal morphine dosing study	9
The incidence of postoperative vasopressor usage: protocol for a prospective international observational cohort study (SQUEEZE)	9
How is postoperative pain after hip and knee replacement managed? An analysis of two large hospitals in Australia	9
Sensitivity and specificity of the question “do you have any concerns regarding your mouth related to undergoing surgery?” for predicting perioperative oral health problems in patients with primary es	9
Prevalence and predictors of hypertension among patients undergoing preanesthesia evaluation at Bahir Dar University Tibebe Ghion Specialized Hospital in 2025: a cross-sectional study	9
Performance of the early warning system score in predicting postoperative complications in older versus younger patients	9
Neonatal outcome following norepinephrine versus phenylephrine for treatment of spinal-induced hypotension among women undergoing caesarean section: systematic review and meta-analysis of randomised c	8
A systematic review and meta-analysis of thoracic epidural analgesia versus other analgesic techniques in patients post-oesophagectomy	8
Understanding ophthalmologists’ perspectives on the risk of cataract surgery	8
Development of risk prediction model for chronic pain after knee replacement surgery: protocol for an individual patient data meta-analysis	8
Perioperative management of the vulnerable and failing right ventricle	8
Protocol: dexmedetomidine on myocardial injury after noncardiac surgery—a multicenter, double-blind, controlled trial	8
Advancing care of the vulnerable and failing RV in the perioperative period	8
Perioperative Quality Initiative (POQI) consensus statement on perioperative assessment of right ventricular function	8
Ultrasound-guided iliopsoas plane block combined with lateral femoral cutaneous nerve block for postoperative analgesia in hip arthroplasty: a retrospective case series	8
The impact of frailty on functional recovery after cardiac surgery—a case control study	8
“A breach in the protocol for no good reason”: a surgical antimicrobial prophylaxis experience in an Ethiopian academic medical center	8
Pulmonary function testing in preoperative high-risk patients	7
Days at home alive after major surgery in patients with and without diabetes: an observational cohort study	7
Opioid-free versus opioid-based anesthesia in laparoscopic sleeve gastrectomy: a single-center, randomized, controlled trial	7
Temperature effect on coagulation function in mild hypothermic patients undergoing thoracic surgeries: thromboelastography (TEG) versus standard tests	7
The impact of glucagon-like peptide-1 receptor agonists in the patients undergoing anesthesia or sedation: systematic review and meta-analysis	7
Mismatch of populations between randomised controlled trials of perioperative interventions in major abdominal surgery and current clinical practice	7
Dosage of epidural morphine analgesia after lower abdominal cancer surgery: a randomized clinical trial among the older adults	7
Response to a prehabilitation program for patients with oesophageal cancer: an observational study	7
Prediction of mortality in secondary peritonitis: a prospective study comparing p-POSSUM, Mannheim Peritonitis Index, and Jabalpur Peritonitis Index	7
Comparison of two 3D scanning software to identify facial features: a prospective instrument to predict difficult airway	7
Factors associated with early inhospital adverse outcome following surgery for acute appendicitis in Uganda: a multicenter cohort	7
Cerebral oxygenation when ventilated or spontaneously breathing: a randomised control trial	7
Recurrence-free survival after curative resection of non-small cell lung cancer between inhalational gas anesthesia and propofol-based total intravenous anesthesia: a multicenter, randomized, clinical	7
The lived experiences of operating room nurses from the surgery on COVID-19 patients: a phenomenological study	7

Dexmedetomidine-enhanced chest wall fascial plane blocks in ultra-fast-track minimally invasive heart valve surgery: a randomized controlled trial	6
The impact of sugammadex versus neostigmine reversal on return to intended oncological therapy-related outcomes after breast cancer surgery: a retrospective cohort study	6
Correction: The impact of preoperative stroke on 1-year mortality and days at home alive after major surgery: an observational cohort study	6
Hypothyroidism as a risk factor for perioperative complications in lumbar spine surgery: a national database study	6
Comparison of tramadol and lornoxicam for the prevention of postoperative catheter-related bladder discomfort: a randomized controlled trial	6
Early postoperative serum aspartate aminotransferase for prediction of post-hepatectomy liver failure	6
Comparison of different pain management strategies during the perioperative period of esophageal squamous cell carcinoma: a retrospective cohort study	6
Perioperative myocardial injury is associated with increased postoperative non-cardiac complications in patients undergoing vascular surgery: a post hoc analysis of a randomised clinical pilot trial	6
Epidemiology of perioperative RV dysfunction: risk factors, incidence, and clinical implications	6
A predictive tool for early identification of moderate-to-severe pain following open colorectal surgery in older adults: a retrospective cohort study	6
Correction: The effects of neoadjuvant chemoradiotherapy and an in-hospital exercise training programme on physical fitness and quality of life in locally advanced rectal cancer patients: a randomised	6
Review of cancer therapies for the perioperative physician	6
Preoperative endothelial dysfunction for the prediction of acute kidney injury after cardiac surgery using cardiopulmonary bypass: a pilot study based on a second analysis of the MONS study	6
Effect of the preoperative physical status on postoperative nausea and vomiting risk: a matched cohort study	6
Geriatric nutritional risk index and prognostic nutritional index improves predictive value of postoperative mortality: a large-scale retrospective cohort study	6
Decreasing the pressure of endotracheal tube cuff slowly with a constant speed can decrease coughing incidence during extubation: a randomized clinical trial	6
Effect of pulmonary rehabilitation on lung cancer surgery outcomes: a matched-case analysis	6
Correction: Data integrity issues: catalyst for a more robust approach to research on perioperative oxygen therapy?	6
Efficacy of preoperative single-dose dexamethasone in preventing postoperative pulmonary complications following minimally invasive esophagectomy: a retrospective propensity score-matched study	6
Incidence of intraoperative hypotension during non-cardiac surgery in community anesthesia practice: a retrospective observational analysis	6
Effect of ultrasound-guided lung recruitment to reduce pulmonary atelectasis after non-cardiac surgery under general anesthesia: a systematic review and meta-analysis of randomized controlled trials	5
Multimodal prehabilitation in patients with non-small cell lung cancer undergoing anatomical resection: protocol of a non-randomised feasibility study	5
Perioperative capacity and contextual challenges in teaching hospitals of southern Ethiopia: explanatory sequential mixed-methods research	5
Experience sharing on perioperative clinical management of gastric cancer patients based on the “China Robotic Gastric Cancer Surgery Guidelines”	5
A randomized evaluation of early oral feeding after ambulatory non-gastrointestinal surgical patients under general anesthesia	5
Validity of the I‑FEED classification in assessing postoperative gastrointestinal impairment in patients undergoing elective lumbar spinal surgery with general anesthesia: a prospective observational	5
Essential right heart physiology for the perioperative practitioner POQI IX: current perspectives on the right heart in the perioperative period	5
Retrolaminar versus erector spinae plane block for enhanced recovery after cesarean section: a retrospective study	5
In-hospital mortality of patients requiring unplanned postoperative ventilatory support: a multicenter observational study	5
Optimization of kidney function in cardiac surgery patients with intra-abdominal hypertension: expert opinion	5
Effect of preoperative intranasal insulin on postoperative delirium in adult surgical patients: a systematic review, meta-analysis, and trial sequential analysis	5
AcumenTM hypotension prediction index guidance for prevention and treatment of hypotension in noncardiac surgery: a prospective, single-arm, multicenter trial	5
The effect of goal-directed crystalloid versus colloid administration on postoperative spirometry parameters: a substudy of a randomized controlled clinical trial	5
Effect of remimazolam versus propofol anesthesia on postoperative delirium in neurovascular surgery: study protocol for a randomized controlled, non-inferiority trial	5
Effects of remimazolam and propofol on sleep rhythm and delirium after spinal surgery in elderly patients	5