OOIR: Observatory of International Research

Papers

(The TQCC of Perioperative Medicine is 4. 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 2021-05-01 to 2025-05-01.)

Article	Citations
Preoperative neutrophil–to–lymphocyte ratio after chemoradiotherapy for esophageal squamous cell carcinoma associates with postoperative pulmonary complications following radical esophagectomy	28
Perioperative use of serum creatinine and postoperative acute kidney injury: a single-centre, observational retrospective study to explore physicians’ perception and practice	27
The efficacy and safety of antimuscarinics for the prevention or treatment of catheter-related bladder discomfort: a systematic review and meta-analysis of randomized controlled trials	26
Surgery school—who, what, when, and how: results of a national survey of multidisciplinary teams delivering group preoperative education	25
The impact of preoperative stroke on 1-year mortality and days at home alive after major surgery: an observational cohort study	22
A comparison of ClearSight noninvasive cardiac output and pulmonary artery bolus thermodilution cardiac output in cardiac surgery patients	19
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	17
Meta-analysis of AKI to CKD transition in perioperative patients	15
Barriers and facilitators of following perioperative internal medicine recommendations by surgical teams: a sequential, explanatory mixed-methods study	13
Preeclamptic heart failure — perioperative concerns and management: a narrative review	13
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	13
Effect of age and gender on pre-operative cardiovascular risk assessment	12
Cardiopulmonary exercise testing before and after intravenous iron in preoperative patients: a prospective clinical study	12
Antibiotic prophylaxis in emergency cholecystectomy for mild to moderate acute cholecystitis: a systematic review and meta-analysis of randomized controlled trials	12
Postoperative and postdischarge nausea and vomiting following ambulatory eye, head, and neck surgeries: a retrospective cohort study comparing incidence and associated factors	12
Use of colloids and crystalloids for perioperative clinical infusion management in cardiac surgery patients and postoperative outcomes: a meta-analysis	12
Hypotension prediction index for prevention of intraoperative hypotension in patients undergoing general anesthesia: a randomized controlled trial	11
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	10
Evaluation of fluid responsiveness with dynamic superior vena cava collapsibility index in mechanically ventilated patients	9
The effect of restrictive vs. liberal fluid protocols on ocular parameters in patients undergoing prone spine surgery: a randomized controlled trial	9
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	9
A comparative study on the effect of dopamine vs phenylephrine in improving the cutaneous analgesic effect of mexiletine in rats	9
Clinical covariates that improve surgical risk prediction and guide targeted prehabilitation: an exploratory, retrospective cohort study of major colorectal cancer surgery patients evaluated with preo	9
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	9
Simplified rapid hydration and contrast-associated acute kidney injury among CKD patients stratified by Mehran score: sub-analysis from the TIME Trial	9

5-HT3 receptor antagonists decrease the prevalence of postoperative delirium in older patients undergoing orthopedic lower limb surgery	8
Comparison of the TOFscan and the TOF-Watch SX during pediatric neuromuscular function recovery: a prospective observational study	8
Utility of NT-proBNP as an objective marker of postoperative heart failure after coronary artery bypass surgery: a prospective observational study	8
The association of multimodal analgesia and high-risk opioid discharge prescriptions in opioid-naive surgical patients	8
The efficacy of computer-assisted cognitive behavioral therapy (cCBT) on psychobiological responses and perioperative outcomes in patients undergoing functional endoscopic sinus surgery: a randomized	8
Outpatient compared to inpatient thyroidectomy on 30-day postoperative outcomes: a national propensity matched analysis	8
Prehabilitation for patients with colorectal cancer: a snapshot of current daily practice in Dutch hospitals	8
The potential for artificial intelligence to predict clinical outcomes in patients who have acquired acute kidney injury during the perioperative period	8
Synthetic colloids as priming fluids in cardiopulmonary bypass and postoperative acute kidney injury: a propensity score-matched study	8
The incidence of postoperative vasopressor usage: protocol for a prospective international observational cohort study (SQUEEZE)	7
Psychological distress among elderly surgical patients who had their surgery postponed during the COVID-19 pandemic	7
Hydroxyethyl starch 130/0.4 for volume replacement therapy in surgical patients: a systematic review and meta-analysis of randomized controlled trials	7
Nomogram for predicting the risk of postoperative delirium in elderly patients undergoing orthopedic surgery	7
How is postoperative pain after hip and knee replacement managed? An analysis of two large hospitals in Australia	7
Intraoperative mild hyperoxia may be associated with improved survival after off-pump coronary artery bypass grafting: a retrospective observational study	7
Hemolysis during open heart surgery in patients with hereditary spherocytosis — systematic review of the literature and case study	7
Performance of the early warning system score in predicting postoperative complications in older versus younger patients	7
Prehabilitation in high-risk patients scheduled for major abdominal cancer surgery: a feasibility study	7
Evaluating a pre-surgical health optimisation programme: a feasibility study	7
Treatment of iron deficiency in patients scheduled for pancreatic surgery: implications for daily prehabilitation practice in pancreatic surgery	7
“A breach in the protocol for no good reason”: a surgical antimicrobial prophylaxis experience in an Ethiopian academic medical center	7
Protocol: dexmedetomidine on myocardial injury after noncardiac surgery—a multicenter, double-blind, controlled trial	6
Influence of sugammadex versus neostigmine for neuromuscular block reversal on the incidence of postoperative pulmonary complications: a meta-analysis of randomized controlled trials	6
Advancing care of the vulnerable and failing RV in the perioperative period	6
A systematic review and meta-analysis of thoracic epidural analgesia versus other analgesic techniques in patients post-oesophagectomy	6
Analgesic efficacy and safety of methylene blue combined with cocktail for periarticular infiltration following total knee arthroplasty: a prospective, randomized, controlled study	6
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	6
Perioperative management of the vulnerable and failing right ventricle	6
The impact of glucagon-like peptide-1 receptor agonists in the patients undergoing anesthesia or sedation: systematic review and meta-analysis	6
Perioperative Quality Initiative (POQI) consensus statement on perioperative assessment of right ventricular function	6
Feasibility of a randomized hypertension screening initiative in the perioperative setting	6
Impact on grafted kidney function of rocuronium-sugammadex vs cisatracurium-neostigmine strategy for neuromuscular block management. An Italian single-center, 2014-2017 retrospective cohort case-contr	6
The lived experiences of operating room nurses from the surgery on COVID-19 patients: a phenomenological study	5
Mismatch of populations between randomised controlled trials of perioperative interventions in major abdominal surgery and current clinical practice	5
Comparison of two 3D scanning software to identify facial features: a prospective instrument to predict difficult airway	5
Effect of sedative premedication with oral midazolam on postanesthesia care unit delirium in older adults: a secondary analysis following an uncontrolled before-after design	5
Opioid-free versus opioid-based anesthesia in laparoscopic sleeve gastrectomy: a single-center, randomized, controlled trial	5
Days at home alive after major surgery in patients with and without diabetes: an observational cohort study	5
Factors associated with early inhospital adverse outcome following surgery for acute appendicitis in Uganda: a multicenter cohort	5
Pulmonary function testing in preoperative high-risk patients	5
The impact of frailty on functional recovery after cardiac surgery—a case control study	5
Epidemiology of perioperative RV dysfunction: risk factors, incidence, and clinical implications	5
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	5
Mortality and associated risk factors in perioperative acute kidney injury treated with continuous renal replacement therapy	5
Temperature effect on coagulation function in mild hypothermic patients undergoing thoracic surgeries: thromboelastography (TEG) versus standard tests	5
Comparison of different pain management strategies during the perioperative period of esophageal squamous cell carcinoma: a retrospective cohort study	5
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	5
Effect of pulmonary rehabilitation on lung cancer surgery outcomes: a matched-case analysis	5
Prediction of mortality in secondary peritonitis: a prospective study comparing p-POSSUM, Mannheim Peritonitis Index, and Jabalpur Peritonitis Index	5
Comparison of tramadol and lornoxicam for the prevention of postoperative catheter-related bladder discomfort: a randomized controlled trial	4

Validity of the I‑FEED classification in assessing postoperative gastrointestinal impairment in patients undergoing elective lumbar spinal surgery with general anesthesia: a prospective observational	4
Effect of the preoperative physical status on postoperative nausea and vomiting risk: a matched cohort study	4
Incidence of intraoperative hypotension during non-cardiac surgery in community anesthesia practice: a retrospective observational analysis	4
Multimodal prehabilitation in patients with non-small cell lung cancer undergoing anatomical resection: protocol of a non-randomised feasibility study	4
Essential right heart physiology for the perioperative practitioner POQI IX: current perspectives on the right heart in the perioperative period	4
Correction: The impact of preoperative stroke on 1-year mortality and days at home alive after major surgery: an observational cohort study	4
Gestational hemostasis: a natural model for hemostasis resuscitation of major periprocedural blood loss	4
Comparison of restrictive fluid therapy with goal-directed fluid therapy for postoperative delirium in patients undergoing spine surgery: a randomized controlled trial	4
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	4
AcumenTM hypotension prediction index guidance for prevention and treatment of hypotension in noncardiac surgery: a prospective, single-arm, multicenter trial	4
Efficacy of preoperative single-dose dexamethasone in preventing postoperative pulmonary complications following minimally invasive esophagectomy: a retrospective propensity score-matched study	4
Early postoperative serum aspartate aminotransferase for prediction of post-hepatectomy liver failure	4
Review of cancer therapies for the perioperative physician	4
Decreasing the pressure of endotracheal tube cuff slowly with a constant speed can decrease coughing incidence during extubation: a randomized clinical trial	4