Extubation FailuresNCT07752173
Comparison of Acute Airway/Respiratory Complications and Intervention Requirements in Extubations Performed During On-Hours Versus Off-Hours
An observational study of Extubation Failures and Extubation, run by Kocaeli City Hospital at 1 site in Turkey (Türkiye).
Trial summary
Perioperative airway/respiratory complications are a major driver of morbidity and mortality. While UK audits NAP4 and NAP7 extensively examined major critical events (e.g., cardiac arrest), prospective standardized data on acute, more frequent extubation-phase complications-such as desaturation, laryngospasm… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Extubation Failures, Extubation, Airway Complication of Anaesthesia
- What is being tested?
- Extubation and Survey/Questionnaire Administration
- Type of treatment
- Surgery or procedure
- How many people
- 2,640 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 3 Aug 2026to 15 May 2027
- How long will I take part?
- 1 Day
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: The study population comprises adult patients (aged ≥ 18 years, with no upper age limit) undergoing either elective or emergency surgery under general anaesthesia with endotracheal intubation at Kocaeli City Hospital, a tertiary referral centre in Turkey. Eligible participants are those in whom tracheal extubation is planned in the operating theatre or in the post-anaesthesia care unit (PACU). The population includes both American Society of Anesthesiologists (ASA) Class I-V patients, reflecting the full spectrum of surgical acuity and comorbidity burden encountered in routine clinical practice. Patients undergoing regional anaesthesia or sedation without intubation, those with a pre-existing tracheostomy, patients transferred intubated to the intensive care unit postoperatively, and those undergoing cardiothoracic surgery involving cardiopulmonary bypass are excluded. Additionally, patients requiring emergency airway management outside the operating theatre, those with a known or susp
Who may be able to join
- Age ≥ 18 years
- Undergoing elective or emergency surgery under general anaesthesia with endotracheal intubation
- Planned tracheal extubation in the operating theatre or post-anaesthesia care unit (PACU)
- Provision of written informed consent (or deferred consent for emergency cases, in accordance with national regulations)
Who cannot join
- Patients undergoing surgery under regional anaesthesia or sedation without endotracheal intubation
- Patients with a tracheostomy in situ
- Patients who remain intubated and are transferred to the intensive care unit (ICU) postoperatively
- Patients undergoing cardiothoracic surgery involving cardiopulmonary bypass
- Emergency airway management performed outside the operating theatre (e.g., ICU, emergency department)
- Patients with known or suspected difficult airway requiring awake fibreoptic intubation
- Patients who refuse to provide informed consent or withdraw consent during the study
- Pregnant patients
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Turkey (Türkiye)1 site, 1 recruiting
- Recruiting
Kocaeli City Hospital
Kocaeli, Izmıt, 41001
Ali Mete Temel, Md, +905438465215, metetemel60@hotmail.com
Mehmet Yilmaz, Md, 05052174432, drmyilmaz33@gmail.com
About this study
Official title: Comparison of Acute Airway/Respiratory Complications and Intervention Requirements in Extubations Performed During On-Hours Versus Off-Hours: A Prospective Observational Cohort Study
Perioperative airway/respiratory complications are a major driver of morbidity and mortality. While UK audits NAP4 and NAP7 extensively examined major critical events (e.g., cardiac arrest), prospective standardized data on acute, more frequent extubation-phase complications-such as desaturation, laryngospasm, obstruction, bronchospasm, and aspiration-remain scarce. Off-hours procedures carry additional risks related to increased workload, reduced senior supervision, and clinician fatigue, though current evidence is inconclusive and requires further human-factors research using validated tools like the Karolinska Sleepiness Scale (KSS). This prospective cohort study at Kocaeli City Hospital aims to compare the incidence of acute airway/respiratory complications and intervention requirements during extubation and the first 30 minutes post-extubation between on-hours (08:00-16:00) and off-hours (>16:00). Notably, this will be the first prospective observational study to specifically test NAP7's off-hours risk findings at the extubation stage, with the goal of strengthening patient safety and guiding institutional quality improvement.
Read the detailed description
Perioperative airway and respiratory complications remain a leading cause of significant morbidity and mortality in anaesthetic practice, as rigorously highlighted by the Royal College of Anaesthetists and Difficult Airway Society's 4th National Audit Project (NAP4), which comprehensively mapped the epidemiology of major airway events across anaesthesia, intensive care, and emergency departments, while particularly emphasising the disproportionately severe outcomes in emergency surgeries and non-theatre settings, as well as the pivotal role of system-level and team-related factors in shaping these adverse events. Building upon this foundation, the recently published analyses from the 7th National Audit Project (NAP7) have further substantiated that airway and respiratory complications-most notably laryngospasm, failed airway management, and pulmonary aspiration-account for a considerable proportion of perioperative cardiac arrests, reaffirming the persistent vulnerability of the airway across the entire perioperative continuum. Nevertheless, despite the invaluable contributions of NAP4 and NAP7, these landmark audits are fundamentally designed as national surveillance programmes focused on catastrophic endpoints such as major airway incidents and cardiac arrest; consequently, they have not provided prospective, standardised, and granular data on the much more frequently encountered acute airway and respiratory events that occur specifically during the extubation phase-including desaturation, laryngospasm, upper airway obstruction, bronchospasm, and regurgitation/aspiration-nor on the corresponding requirement for active clinical interventions in real-time practice, which remains a conspicuous and clinically relevant knowledge gap. This gap is further compounded by the observation that even the limited number of prospective studies concentrating on the adult extubation period have reported widely variable complication spectra and employed inconsistent definitions across different institutions, underscoring the pressing need for standardised, multicentre or single-centre prospective data that can inform robust quality benchmarks and facilitate meaningful comparisons across settings. Concurrently, a growing body of literature has raised legitimate concerns regarding the heightened perioperative risk associated with off-hours and on-call working conditions, wherein the convergence of increased workload due to concurrent emergency cases, diminished availability of senior supervisory staff, and the progressive accumulation of clinician fatigue and sleep deprivation may collectively predispose to suboptimal clinical performance and adverse patient outcomes; indeed, while off-hours surgery has been associated with higher mortality relative to daytime procedures, the existing evidence remains of low certainty, and patient-specific as well as surgical characteristics do not fully account for this observed association, thereby necessitating further investigations that specifically target human and organisational factors as explanatory variables. Within this context, the objective and validated assessment of clinician fatigue becomes particularly pertinent, and the Karolinska Sleepiness Scale (KSS), which has been widely employed in anaesthesia research, verified against electroencephalographic (EEG) measurements, and previously utilised to evaluate sleepiness levels under on-call conditions, offers a practical and psychometrically sound tool to objectively quantify the impact of fatigue on airway management performance during extubation. Motivated by these converging imperatives, this prospective observational cohort study at Kocaeli City Hospital is designed to compare the incidence of acute airway and respiratory complications, along with the associated intervention requirements, at the moment of extubation and during the immediate 30-minute post-extubation period, between extubations performed during on-hours (08:00-16:00) and those conducted during off-hours (after 16:00, as well as weekends and public holidays), with the overarching aims of strengthening institutional patient safety practices, driving evidence-based process improvements, and ultimately contributing to the broader discourse on perioperative airway safety. Notably, this investigation carries a distinctive scientific value, as it will be the first prospective observational study specifically designed to test NAP7's off-hours risk hypothesis at the extubation stage, thereby directly addressing a critical evidence gap in the current anaesthesia literature and offering actionable insights that may inform future guidelines and organisational policies regarding safe extubation practices across different times of the day.
- Being tested
- Extubation, Survey/Questionnaire Administration
- Keywords
- Extubation, Airway complications, Off-hours, General anaesthesia, Prospective cohort study
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ExtubationProcedure or surgery
An extubation attempt is the planned, deliberate removal of the endotracheal tube from the patient's trachea, beginning with preparatory manoeuvres (such as oropharyngeal suctioning and cuff deflation) and ending with the complete withdrawal of the tube and establishment of a patent native airway with adequate spontaneous breathing.
Survey/Questionnaire AdministrationOther
Description: The Karolinska Sleepiness Scale (KSS), a validated 9-point Likert scale (1 = extremely alert, 9 = very sleepy, fighting sleep), will be administered to the attending anaesthetist responsible for performing the extubation immediately prior to the extubation procedure. This assessment is performed to objectively quantify the clinician's subjective level of sleepiness and fatigue at the time of extubation. The KSS score will be recorded as a predictor/exposure variable to evaluate the association between anaesthetist fatigue and the occurrence of acute airway and respiratory complications during extubation. This assessment is applied uniformly across both study groups (on-hours and off-hours extubations).
| Study group | Role | What they receive |
|---|---|---|
| On-Hours | On-hours group: Extubations performed between 08:00 and 16:00 on weekdays (Monday to Friday), excluding public holidays. Receives: Procedure: Extubation; Other: Survey/Questionnaire Administration | |
| Off-Hours | Off-hours group: Extubations performed after 16:00 on weekdays, as well as all extubations performed on weekends and public holidays, regardless of the time of day Receives: Procedure: Extubation; Other: Survey/Questionnaire Administration |
What is being measured
The primary outcome is the main question the study is designed to answer.
Incidence of Desaturation During Extubation
Description: The occurrence of desaturation during the extubation procedure itself, defined as a peripheral oxygen saturation (SpO₂) < 90% lasting for ≥ 30 seconds (or a ≥ 5% decrease from baseline in patients with pre-existing hypoxaemia), measured from the initiation of extubation manoeuvres (cuff deflation and suctioning) until the complete withdrawal of the endotracheal tube.
Time Frame: Desaturation occurring during the extubation attempt and within the first 30 minutes post-extubation.
Measured: 30 min. after extubation
Secondary outcomes (1)
Other acute airway/respiratory complications
(laryngospasm, airway obstruction, bronchospasm, aspiration, apnoea, haemodynamic instability, arrhythmias, unplanned reintubation, surgical airway).
Measured: 30 min. after extubation
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted7 Aug 2026
- Study start3 Aug 2026
- Primary completion3 May 2027 (estimated)
- Study completion15 May 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (5)Papers the sponsor has linked to this study.
- Other trials for Extubation FailuresStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 2,640 participants (estimated)
- Target duration
- 1 Day
Sponsor and investigators
- Lead sponsor
- Kocaeli City Hospital
- Sponsor type
- Other government
- Responsible party
- Principal investigator, Ali Mete Temel, Kocaeli City Hospital
- Investigators
- Mehmet Yilmaz, Study chair, Kocaeli City Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07752173
- Sponsor's protocol ID
- KSH-2026-89
- Status last verified
- Aug 2026
- First submitted
- 3 Aug 2026
- Last updated
- 29 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Study data are the exclusive property of Kocaeli City Hospital and may only be shared with formal institutional authorization.
Publications
Xie Q, Shen Z, Pan M, Li Y, Luo Z, Wang C, Zhao L, Fang Y, Ding X, Teng J, Xu J. Weekend effect on the incidence and outcomes of cardiac surgery associated - acute kidney injury. BMC Cardiovasc Disord. 2023 Oct 27;23(1):524. doi: 10.1186/s12872-023-03431-4.
PubMed 37891475Patel MS, Thomas JJ, Aguayo X, Gutmann D, Sarwary SH, Wain M. The Effect of Weekend Surgery on Outcomes of Emergency Laparotomy: Experience at a High Volume District General Hospital. Cureus. 2022 Mar 27;14(3):e23537. doi: 10.7759/cureus.23537. eCollection 2022 Mar.
PubMed 35494929Ash-Rafzadeh H, Chambers TJ, Velez FO, Moodie CC, Garrett JR, Fontaine JP, Toloza EM. Effect of Surgical Day of Week on Postoperative Outcomes After Robotic-Assisted Pulmonary Lobectomy. Cureus. 2023 Feb 23;15(2):e35379. doi: 10.7759/cureus.35379. eCollection 2023 Feb.
PubMed 36846643Maman D, Steinfeld Y, Berkovich Y. No Weekend Effect in Elective Primary Total Knee Arthroplasty: A Nationwide Analysis of 437,121 U.S. Cases. J Clin Med. 2025 Dec 12;14(24):8816. doi: 10.3390/jcm14248816.
PubMed 41464718Cortegiani A, Gregoretti C, Neto AS, Hemmes SNT, Ball L, Canet J, Hiesmayr M, Hollmann MW, Mills GH, Melo MFV, Putensen C, Schmid W, Severgnini P, Wrigge H, Gama de Abreu M, Schultz MJ, Pelosi P; LAS VEGAS Investigators, the PROVE Network, and the Clinical Trial Network of the European Society of Anaesthesiology. Association between night-time surgery and occurrence of intraoperative adverse events and postoperative pulmonary complications. Br J Anaesth. 2019 Mar;122(3):361-369. doi: 10.1016/j.bja.2018.10.063. Epub 2019 Feb 8.
PubMed 30770054
Study at a glance
From the registry record, last updated by the sponsor on 29 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Acute Airway/Respiratory Complications and Intervention Requirements in Extubations Performed During On-Hours Versus Off-Hours: A Prospective Observational Cohort Study
- ClinicalTrials.gov ID
- NCT07752173
- Acronym / sponsor ID
- KSH-2026-89
- Keywords
- Extubation, Airway complications, Off-hours, General anaesthesia, Prospective cohort study
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 2,640 participants (estimated)
- Lead sponsor
- Kocaeli City HospitalOther government
- Study start
- 3 Aug 2026 (actual)
- Primary completion
- 3 May 2027 (estimated)
- Study completion
- 15 May 2027 (estimated)
- First posted
- 7 Aug 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Perioperative airway/respiratory complications are a major driver of morbidity and mortality. While UK audits NAP4 and NAP7 extensively examined major critical events (e.g., cardiac arrest), prospective standardized data on acute, more frequent extubation-phase complications-such as desaturation, laryngospasm, obstruction, bronchospasm, and aspiration-remain scarce. Off-hours procedures carry additional risks related to increased workload, reduced senior supervision, and clinician fatigue, though current evidence is inconclusive and requires further human-factors research using validated tools like the Karolinska Sleepiness Scale (KSS). This prospective cohort study at Kocaeli City Hospital aims to compare the incidence of acute airway/respiratory complications and intervention requirements during extubation and the first 30 minutes post-extubation between on-hours (08:00-16:00) and off-hours (>16:00). Notably, this will be the first prospective observational study to specifically test NAP7's off-hours risk findings at the extubation stage, with the goal of strengthening patient safety and guiding institutional quality improvement.
Detailed description
Perioperative airway and respiratory complications remain a leading cause of significant morbidity and mortality in anaesthetic practice, as rigorously highlighted by the Royal College of Anaesthetists and Difficult Airway Society's 4th National Audit Project (NAP4), which comprehensively mapped the epidemiology of major airway events across anaesthesia, intensive care, and emergency departments, while particularly emphasising the disproportionately severe outcomes in emergency surgeries and non-theatre settings, as well as the pivotal role of system-level and team-related factors in shaping these adverse events. Building upon this foundation, the recently published analyses from the 7th National Audit Project (NAP7) have further substantiated that airway and respiratory complications-most notably laryngospasm, failed airway management, and pulmonary aspiration-account for a considerable proportion of perioperative cardiac arrests, reaffirming the persistent vulnerability of the airway across the entire perioperative continuum. Nevertheless, despite the invaluable contributions of NAP4 and NAP7, these landmark audits are fundamentally designed as national surveillance programmes focused on catastrophic endpoints such as major airway incidents and cardiac arrest; consequently, they have not provided prospective, standardised, and granular data on the much more frequently encountered acute airway and respiratory events that occur specifically during the extubation phase-including desaturation, laryngospasm, upper airway obstruction, bronchospasm, and regurgitation/aspiration-nor on the corresponding requirement for active clinical interventions in real-time practice, which remains a conspicuous and clinically relevant knowledge gap. This gap is further compounded by the observation that even the limited number of prospective studies concentrating on the adult extubation period have reported widely variable complication spectra and employed inconsistent definitions across different institutions, underscoring the pressing need for standardised, multicentre or single-centre prospective data that can inform robust quality benchmarks and facilitate meaningful comparisons across settings. Concurrently, a growing body of literature has raised legitimate concerns regarding the heightened perioperative risk associated with off-hours and on-call working conditions, wherein the convergence of increased workload due to concurrent emergency cases, diminished availability of senior supervisory staff, and the progressive accumulation of clinician fatigue and sleep deprivation may collectively predispose to suboptimal clinical performance and adverse patient outcomes; indeed, while off-hours surgery has been associated with higher mortality relative to daytime procedures, the existing evidence remains of low certainty, and patient-specific as well as surgical characteristics do not fully account for this observed association, thereby necessitating further investigations that specifically target human and organisational factors as explanatory variables. Within this context, the objective and validated assessment of clinician fatigue becomes particularly pertinent, and the Karolinska Sleepiness Scale (KSS), which has been widely employed in anaesthesia research, verified against electroencephalographic (EEG) measurements, and previously utilised to evaluate sleepiness levels under on-call conditions, offers a practical and psychometrically sound tool to objectively quantify the impact of fatigue on airway management performance during extubation. Motivated by these converging imperatives, this prospective observational cohort study at Kocaeli City Hospital is designed to compare the incidence of acute airway and respiratory complications, along with the associated intervention requirements, at the moment of extubation and during the immediate 30-minute post-extubation period, between extubations performed during on-hours (08:00-16:00) and those conducted during off-hours (after 16:00, as well as weekends and public holidays), with the overarching aims of strengthening institutional patient safety practices, driving evidence-based process improvements, and ultimately contributing to the broader discourse on perioperative airway safety. Notably, this investigation carries a distinctive scientific value, as it will be the first prospective observational study specifically designed to test NAP7's off-hours risk hypothesis at the extubation stage, thereby directly addressing a critical evidence gap in the current anaesthesia literature and offering actionable insights that may inform future guidelines and organisational policies regarding safe extubation practices across different times of the day.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Target follow-up
- 1 Day
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| On-Hours | – | Procedure: Extubation, Other: Survey/Questionnaire AdministrationOn-hours group: Extubations performed between 08:00 and 16:00 on weekdays (Monday to Friday), excluding public holidays. |
| Off-Hours | – | Procedure: Extubation, Other: Survey/Questionnaire AdministrationOff-hours group: Extubations performed after 16:00 on weekdays, as well as all extubations performed on weekends and public holidays, regardless of the time of day |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- The study population comprises adult patients (aged ≥ 18 years, with no upper age limit) undergoing either elective or emergency surgery under general anaesthesia with endotracheal intubation at Kocaeli City Hospital, a tertiary referral centre in Turkey. Eligible participants are those in whom tracheal extubation is planned in the operating theatre or in the post-anaesthesia care unit (PACU). The population includes both American Society of Anesthesiologists (ASA) Class I-V patients, reflecting the full spectrum of surgical acuity and comorbidity burden encountered in routine clinical practice. Patients undergoing regional anaesthesia or sedation without intubation, those with a pre-existing tracheostomy, patients transferred intubated to the intensive care unit postoperatively, and those undergoing cardiothoracic surgery involving cardiopulmonary bypass are excluded. Additionally, patients requiring emergency airway management outside the operating theatre, those with a known or susp
Key inclusion criteria (4 listed)
- Age ≥ 18 years
- Undergoing elective or emergency surgery under general anaesthesia with endotracheal intubation
- Planned tracheal extubation in the operating theatre or post-anaesthesia care unit (PACU)
- Provision of written informed consent (or deferred consent for emergency cases, in accordance with national regulations)
Key exclusion criteria (8 listed)
- Patients undergoing surgery under regional anaesthesia or sedation without endotracheal intubation
- Patients with a tracheostomy in situ
- Patients who remain intubated and are transferred to the intensive care unit (ICU) postoperatively
- Patients undergoing cardiothoracic surgery involving cardiopulmonary bypass
- Emergency airway management performed outside the operating theatre (e.g., ICU, emergency department)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| ExtubationAn extubation attempt is the planned, deliberate removal of the endotracheal tube from the patient's trachea, beginning with preparatory manoeuvres (such as oropharyngeal suctioning and cuff deflation) and ending with the complete withdrawal of the tube and establishment of a patent native airway with adequate spontaneous breathing. | Procedure or surgery | Off-Hours, On-Hours |
| Survey/Questionnaire AdministrationDescription: The Karolinska Sleepiness Scale (KSS), a validated 9-point Likert scale (1 = extremely alert, 9 = very sleepy, fighting sleep), will be administered to the attending anaesthetist responsible for performing the extubation immediately prior to the extubation procedure. This assessment is performed to objectively quantify the clinician's subjective level of sleepiness and fatigue at the time of extubation. The KSS score will be recorded as a predictor/exposure variable to evaluate the association between anaesthetist fatigue and the occurrence of acute airway and respiratory complications during extubation. This assessment is applied uniformly across both study groups (on-hours and off-hours extubations). | Other | Off-Hours, On-Hours |
Primary outcome
Incidence of Desaturation During Extubation
Time frame: 30 min. after extubation
Description: The occurrence of desaturation during the extubation procedure itself, defined as a peripheral oxygen saturation (SpO₂) < 90% lasting for ≥ 30 seconds (or a ≥ 5% decrease from baseline in patients with pre-existing hypoxaemia), measured from the initiation of extubation manoeuvres (cuff deflation and suctioning) until the complete withdrawal of the endotracheal tube. Time Frame: Desaturation occurring during the extubation attempt and within the first 30 minutes post-extubation.
1 secondary outcome
Other acute airway/respiratory complications
Time frame: 30 min. after extubation
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Sep 2026.
- Background: PubMed 37891475Xie Q, Shen Z, Pan M, Li Y, Luo Z, Wang C, Zhao L, Fang Y, Ding X, Teng J, Xu J. Weekend effect on the incidence and outcomes of cardiac surgery associated - acute kidney injury. BMC Cardiovasc Disord. 2023 Oct 27;23(1):524. doi: 10.1186/s12872-023-03431-4.
- Background: PubMed 35494929Patel MS, Thomas JJ, Aguayo X, Gutmann D, Sarwary SH, Wain M. The Effect of Weekend Surgery on Outcomes of Emergency Laparotomy: Experience at a High Volume District General Hospital. Cureus. 2022 Mar 27;14(3):e23537. doi: 10.7759/cureus.23537. eCollection 2022 Mar.
- Background: PubMed 36846643Ash-Rafzadeh H, Chambers TJ, Velez FO, Moodie CC, Garrett JR, Fontaine JP, Toloza EM. Effect of Surgical Day of Week on Postoperative Outcomes After Robotic-Assisted Pulmonary Lobectomy. Cureus. 2023 Feb 23;15(2):e35379. doi: 10.7759/cureus.35379. eCollection 2023 Feb.
- Background: PubMed 41464718Maman D, Steinfeld Y, Berkovich Y. No Weekend Effect in Elective Primary Total Knee Arthroplasty: A Nationwide Analysis of 437,121 U.S. Cases. J Clin Med. 2025 Dec 12;14(24):8816. doi: 10.3390/jcm14248816.
- Background: PubMed 30770054Cortegiani A, Gregoretti C, Neto AS, Hemmes SNT, Ball L, Canet J, Hiesmayr M, Hollmann MW, Mills GH, Melo MFV, Putensen C, Schmid W, Severgnini P, Wrigge H, Gama de Abreu M, Schultz MJ, Pelosi P; LAS VEGAS Investigators, the PROVE Network, and the Clinical Trial Network of the European Society of Anaesthesiology. Association between night-time surgery and occurrence of intraoperative adverse events and postoperative pulmonary complications. Br J Anaesth. 2019 Mar;122(3):361-369. doi: 10.1016/j.bja.2018.10.063. Epub 2019 Feb 8.
- Individual participant dataSharing planned: No. Study data are the exclusive property of Kocaeli City Hospital and may only be shared with formal institutional authorization.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Mehmet Yilmaz study chair
Kocaeli City Hospital
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Extubation Failures and Extubation, run by Kocaeli City Hospital at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 29 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Ali Mete Temel, MD (+905438465215, metetemel60@hotmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Incidence of Desaturation During Extubation (time frame: 30 min. after extubation). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07752173, which also lists 5 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Sep 2026.