All complications occurring within 30 days after surgery. All complications occurring within 30 days after surgery.
Conditions
Interventions
This is an observational study, there will be no interventions regarding the study. 
Sponsors
University Hospitals Birmingham NHS Foundation Trust
Eligibility
Inclusion criteria
Inclusion criteria: Inclusion criteria: any operation (elective or emergency) performed in an operating theatre is eligible for inclusion, except for minor procedures specified below. All surgical specialties can participate including acute care surgery, breast surgery, cardiac surgery, colorectal surgery, general surgery, gynaecology, hepatobiliary surgery, neurosurgery, obstetrics, oesophagogastric surgery, ophthalmology, oral and maxillofacial surgery, orthopaedics, otolaryngology, paediatric surgery, plastic surgery, thoracic surgery, transplant surgery, trauma surgery, urology and vascular surgery. Patients undergoing both day case surgery and inpatient surgery should be included.Specialty Excluded procedures Abdominal surgery Ascitic drain (drainage of peritoneal cavity) Endoscopic ultrasound Laparoscopic ultrasound Breast surgery Breast biopsy Cardiac surgery Insertion of cardiac pacemaker PCI: percutaneous coronary intervention Transluminal balloon angioplasty of coronary artery Colorectal surgery Colonoscopy (diagnostic or therapeutic) Flexible sigmoidoscopy (diagnostic or therapeutic) Proctoscopy (diagnostic or therapeutic) Dental procedures Implantation of tooth Insertion of dental prosthesis Orthodontic operations Restoration of tooth Extraction of tooth Gynaecology Cervical biopsy Colposcopy (diagnostic or therapeutic) Obstetrics Any vaginal delivery (normal delivery, breech delivery, forceps delivery, vacuum delivery) Repair of obstetric laceration SurgWeek-2 Study Protocol version 3.0 (30 April 2026) 2 Ophthalmology Removal of foreign body from cornea Orthopaedics Bone biopsy Injection into joint Muscle biopsy Otolaryngology Nasendoscopy (diagnostic or therapeutic) Packing of cavity of nose Thoracic surgery Bronchoscopy (diagnostic or therapeutic) Chest drain Upper gastrointestinal surgery ERCP: endoscopic retrograde cholangiopancreatography (diagnostic or therapeutic) Liver biopsy OGD: Oesophago-gastro-duodenoscopy (diagnostic or therapeutic) Urology* Bladder biopsy Extracorporeal shock wave lithotripsy (ESWL) Flexible cystoscopy (diagnostic or therapeutic) Percutaneous nephrostomy Percutaneous nephrolithotomy (PCNL) Vascular surgery Transluminal (endovascular) procedures on arteries (diagnostic or therapeutic), including with open cut down to the artery Transluminal (endovascular) procedures on veins (diagnostic or therapeutic) Other Insertion of central venous catheter/ line (CVC) Lumbar (spinal) puncture Percutaneous tracheostomy Skin biopsy (including shave biopsy of skin) Therapeutic epidural injection *Note: transurethral resection of the prostate (TURP), transurethral resection of bladder tumour (TURBT), rigid cystoscopy under general anaesthesia, and insertion of ureteric stent should be included.
Exclusion criteria
Exclusion criteria: Patients who do not undergo an operation (e.g. planned operations that are cancelled). Patients undergoing angiography or minor procedures listed in 6.2. Procedures performed outside of an operating theatre.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The primary outcome will be overall 30-day postoperative complications. | — |
Secondary
| Measure | Time frame |
|---|---|
| The secondary outcomes will include: 30-day Clavien-Dindo complication grade. This is the most widely used complication grading system worldwide and it has been extensively validated 30-day reoperation 30-day readmission 30-day postoperative mortality 30-day surgical site infection 30-day deep organ space infection 30-day postoperative pneumonia 30-day acute respiratory distress syndrome 30-day unexpected ventilation. 30-day pulmonary embolism. 30-day deep vein thrombosis. 30-day cardiac complications. 30-day anastomotic leak. Hospital length of stay within 30-days of surgery. Days alive out of hospital at postoperative day 30. | — |
Countries
Albania, Algeria, Argentina, Aruba, Australia, Austria, Azerbaijan, Bahrain, Bangladesh, Belarus, Belgium, Benin, Bosnia and Herzegovina, Botswana, Brazil, Bulgaria, Burkina Faso, Burundi, Cambodia, Cameroon, Canada, Central African Republic, Chile, China, Croatia, Cyprus, Czech Republic, Denmark, Dominican Republic, Ecuador, Egypt, El Salvador, Ethiopia, France, Gabon, Gambia, Georgia, Germany, Ghana, Greece, Guatemala, Honduras, Hungary, Iceland, India, Indonesia, Iraq, Ireland, Italy, Japan, Jordan, Kazakhstan, Kenya, Kuwait, Latvia, Lebanon, Libya, Lithuania, Madagascar, Malaysia, Mali, Malta, Mexico, Mongolia, Montenegro, Morocco, Namibia, Nepal, Netherlands, New Zealand, Niger, Nigeria, Norway, Oman, Pakistan, Palestinian Territories, Panama, Paraguay, Peru, Philippines, Poland, Portugal, Romania, Russian Federation, Rwanda, Saudi Arabia, Serbia, Singapore, Slovakia, Slovenia, Somalia, South Africa, South Sudan, Spain, Sri Lanka, Sudan, Sweden, Switzerland, Syria, Tanzania, Thailand, Tunisia, Turkey, Uganda, Ukraine, United Arab Emirates, United Kingdom, United States, Venezuela, Vietnam, Yemen
Contacts
Public ContactLAA Vaassen
Maastricht Universitair Medisch Centrum +
Outcome results
None listed