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 2021-08-01 to 2025-08-01.)

Article	Citations
Preoperative neutrophil–to–lymphocyte ratio after chemoradiotherapy for esophageal squamous cell carcinoma associates with postoperative pulmonary complications following radical esophagectomy	34
The impact of preoperative stroke on 1-year mortality and days at home alive after major surgery: an observational cohort study	31
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	27
A comparison of ClearSight noninvasive cardiac output and pulmonary artery bolus thermodilution cardiac output in cardiac surgery patients	23
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	22
Preeclamptic heart failure — perioperative concerns and management: a narrative review	20
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	17
Effect of age and gender on pre-operative cardiovascular risk assessment	16
Cardiopulmonary exercise testing before and after intravenous iron in preoperative patients: a prospective clinical study	16
Antibiotic prophylaxis in emergency cholecystectomy for mild to moderate acute cholecystitis: a systematic review and meta-analysis of randomized controlled trials	15
Postoperative and postdischarge nausea and vomiting following ambulatory eye, head, and neck surgeries: a retrospective cohort study comparing incidence and associated factors	14
Hypotension prediction index for prevention of intraoperative hypotension in patients undergoing general anesthesia: a randomized controlled trial	14
Use of colloids and crystalloids for perioperative clinical infusion management in cardiac surgery patients and postoperative outcomes: a meta-analysis	14
Effect of butorphanol nasal spray administration on patient cooperativity during labor epidural placement: a single-center randomized controlled trial	13
Barriers and facilitators of following perioperative internal medicine recommendations by surgical teams: a sequential, explanatory mixed-methods study	12
The effect of restrictive vs. liberal fluid protocols on ocular parameters in patients undergoing prone spine surgery: 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	11
Simplified rapid hydration and contrast-associated acute kidney injury among CKD patients stratified by Mehran score: sub-analysis from the TIME Trial	11
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	11
The association of multimodal analgesia and high-risk opioid discharge prescriptions in opioid-naive surgical patients	11
Evaluation of fluid responsiveness with dynamic superior vena cava collapsibility index in mechanically ventilated patients	11
Higher rate of undetected intraoperative damage of latex-free surgical gloves worn by scrub nurses	10
A comparative study on the effect of dopamine vs phenylephrine in improving the cutaneous analgesic effect of mexiletine in rats	10
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	10
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	10

The potential for artificial intelligence to predict clinical outcomes in patients who have acquired acute kidney injury during the perioperative period	9
Prehabilitation for patients with colorectal cancer: a snapshot of current daily practice in Dutch hospitals	9
Synthetic colloids as priming fluids in cardiopulmonary bypass and postoperative acute kidney injury: a propensity score-matched study	9
The efficacy of computer-assisted cognitive behavioral therapy (cCBT) on psychobiological responses and perioperative outcomes in patients undergoing functional endoscopic sinus surgery: a randomized	9
Comparison of the TOFscan and the TOF-Watch SX during pediatric neuromuscular function recovery: a prospective observational study	9
5-HT3 receptor antagonists decrease the prevalence of postoperative delirium in older patients undergoing orthopedic lower limb surgery	9
Intraoperative mild hyperoxia may be associated with improved survival after off-pump coronary artery bypass grafting: a retrospective observational study	8
Evaluating a pre-surgical health optimisation programme: a feasibility study	8
Influence of portal hypertension-associated upper gastrointestinal bleeding and acute kidney injury on liver transplantation prognosis	8
Outpatient compared to inpatient thyroidectomy on 30-day postoperative outcomes: a national propensity matched analysis	8
Prehabilitation in high-risk patients scheduled for major abdominal cancer surgery: a feasibility study	8
Psychological distress among elderly surgical patients who had their surgery postponed during the COVID-19 pandemic	8
How is postoperative pain after hip and knee replacement managed? An analysis of two large hospitals in Australia	7
Nomogram for predicting the risk of postoperative delirium in elderly patients undergoing orthopedic surgery	7
Advancing care of the vulnerable and failing RV in the perioperative period	7
Influence of sugammadex versus neostigmine for neuromuscular block reversal on the incidence of postoperative pulmonary complications: a meta-analysis of randomized controlled trials	7
Hemolysis during open heart surgery in patients with hereditary spherocytosis — systematic review of the literature and case study	7
Treatment of iron deficiency in patients scheduled for pancreatic surgery: implications for daily prehabilitation practice in pancreatic surgery	7
Analgesic efficacy and safety of methylene blue combined with cocktail for periarticular infiltration following total knee arthroplasty: a prospective, randomized, controlled study	7
Mortality and associated risk factors in perioperative acute kidney injury treated with continuous renal replacement therapy	7
Performance of the early warning system score in predicting postoperative complications in older versus younger patients	7
The incidence of postoperative vasopressor usage: protocol for a prospective international observational cohort study (SQUEEZE)	7
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	7
“A breach in the protocol for no good reason”: a surgical antimicrobial prophylaxis experience in an Ethiopian academic medical center	7
A systematic review and meta-analysis of thoracic epidural analgesia versus other analgesic techniques in patients post-oesophagectomy	6
The impact of frailty on functional recovery after cardiac surgery—a case control study	6
Ultrasound-guided iliopsoas plane block combined with lateral femoral cutaneous nerve block for postoperative analgesia in hip arthroplasty: a retrospective case series	6
Mismatch of populations between randomised controlled trials of perioperative interventions in major abdominal surgery and current clinical practice	6
Opioid-free versus opioid-based anesthesia in laparoscopic sleeve gastrectomy: a single-center, randomized, controlled trial	6
Feasibility of a randomized hypertension screening initiative in the perioperative setting	6
Protocol: dexmedetomidine on myocardial injury after noncardiac surgery—a multicenter, double-blind, controlled trial	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
Pulmonary function testing in preoperative high-risk patients	6
The lived experiences of operating room nurses from the surgery on COVID-19 patients: a phenomenological study	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
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	6
Factors associated with early inhospital adverse outcome following surgery for acute appendicitis in Uganda: a multicenter cohort	6
Incidence of intraoperative hypotension during non-cardiac surgery in community anesthesia practice: a retrospective observational analysis	5
Dosage of epidural morphine analgesia after lower abdominal cancer surgery: a randomized clinical trial among the older adults	5
Prediction of mortality in secondary peritonitis: a prospective study comparing p-POSSUM, Mannheim Peritonitis Index, and Jabalpur Peritonitis Index	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
Effect of the preoperative physical status on postoperative nausea and vomiting risk: a matched cohort study	5
Dexmedetomidine-enhanced chest wall fascial plane blocks in ultra-fast-track minimally invasive heart valve surgery: a randomized controlled trial	5
Decreasing the pressure of endotracheal tube cuff slowly with a constant speed can decrease coughing incidence during extubation: a randomized clinical trial	5
Comparison of different pain management strategies during the perioperative period of esophageal squamous cell carcinoma: a retrospective cohort study	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
Epidemiology of perioperative RV dysfunction: risk factors, incidence, and clinical implications	5
Gestational hemostasis: a natural model for hemostasis resuscitation of major periprocedural blood loss	5

Comparison of restrictive fluid therapy with goal-directed fluid therapy for postoperative delirium in patients undergoing spine surgery: a randomized controlled trial	5
Early postoperative serum aspartate aminotransferase for prediction of post-hepatectomy liver failure	5
Effect of pulmonary rehabilitation on lung cancer surgery outcomes: a matched-case analysis	5
Days at home alive after major surgery in patients with and without diabetes: an observational cohort study	5
Comparison of two 3D scanning software to identify facial features: a prospective instrument to predict difficult airway	5
Temperature effect on coagulation function in mild hypothermic patients undergoing thoracic surgeries: thromboelastography (TEG) versus standard tests	5
Review of cancer therapies for the perioperative physician	5
AcumenTM hypotension prediction index guidance for prevention and treatment of hypotension in noncardiac surgery: a prospective, single-arm, multicenter trial	4
Prevalence, risk factors, and complications associated with hyponatraemia following elective primary hip and knee arthroplasty	4
Sublingual sufentanil after orthopaedic and abdominal surgery: long-term outcome and safety	4
Optimization of kidney function in cardiac surgery patients with intra-abdominal hypertension: expert opinion	4
The effect of goal-directed crystalloid versus colloid administration on postoperative spirometry parameters: a substudy of a randomized controlled clinical trial	4
In-hospital mortality of patients requiring unplanned postoperative ventilatory support: a multicenter observational study	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
Comparison of tramadol and lornoxicam for the prevention of postoperative catheter-related bladder discomfort: a randomized controlled trial	4
Effect of remimazolam versus propofol anesthesia on postoperative delirium in neurovascular surgery: study protocol for a randomized controlled, non-inferiority trial	4
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	4
A scoping review of local quality improvement using data from UK perioperative National Clinical Audits	4
Prevalence of preoperative anxiety among hospitalized patients in a developing country: a study of associated factors	4
The impact of preoperative malnutrition on postoperative delirium: a systematic review and meta-analysis	4
Experience sharing on perioperative clinical management of gastric cancer patients based on the “China Robotic Gastric Cancer Surgery Guidelines”	4
Correction: The impact of preoperative stroke on 1-year mortality and days at home alive after major surgery: an observational cohort study	4
Essential right heart physiology for the perioperative practitioner POQI IX: current perspectives on the right heart in the perioperative period	4
Efficacy of preoperative single-dose dexamethasone in preventing postoperative pulmonary complications following minimally invasive esophagectomy: a retrospective propensity score-matched study	4
Perioperative capacity and contextual challenges in teaching hospitals of southern Ethiopia: explanatory sequential mixed-methods research	4
New surgical realities: implementation of an enhanced recovery after surgery protocol for gynecological laparoscopy—a prospective study	4
Exploring biomarkers for diagnosing and predicting organ dysfunction in patients with perioperative sepsis: a preliminary investigation	4
Effects of remimazolam and propofol on sleep rhythm and delirium after spinal surgery in elderly patients	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
Multimodal prehabilitation in patients with non-small cell lung cancer undergoing anatomical resection: protocol of a non-randomised feasibility study	4