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Trial registered on ANZCTR

Registration number
Ethics application status
Date submitted
Date registered
Date last updated
Type of registration
Prospectively registered

Titles & IDs
Public title
Effects of ultrasound-guided adductor canal block on postoperative quality of recovery after arthroscopy knee surgery
Scientific title
Effects of ultrasound-guided adductor canal block on postoperative quality of recovery after arthroscopy knee surgery
Secondary ID [1] 289106 0
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Postoperative Complications 298565 0
meniscus injury 299294 0
Condition category
Condition code
Anaesthesiology 298649 298649 0 0
Pain management
Musculoskeletal 299288 299288 0 0
Other muscular and skeletal disorders
Surgery 299289 299289 0 0
Other surgery

Study type
Description of intervention(s) / exposure
All participants had an ultrasound-guided adductor canal block (ACB) performed 30 minutes prior to general anaesthesia. ACB was performed by a single consultant anaesthetist using 10ml of 0.5% ropivacaine
Intervention code [1] 294610 0
Treatment: Drugs
Comparator / control treatment
Ultrasound-guided adductor canal block will be adminstered with isotonic saline 0.9% 10ml before induction, and the anesthesia was applied as group ACB.
Control group

Primary outcome [1] 298145 0
The quality of recovery is assessed with a 40-item quality-of-recovery questionnaire
Timepoint [1] 298145 0
The quality of recovery is assessed on the day before surgery and 24h after surgery
Secondary outcome [1] 323264 0
Postoperative pain intensity is assessed with visual analogue scale (VAS) which 0 and 100 mm referring to ‘no pain’ and ‘worst pain imaginable’.
Timepoint [1] 323264 0
Postoperative pain is assessed at 30min, 1, 2, 4, 8 and 24h after surgery
Secondary outcome [2] 323265 0
Cumulative opioid consumption is recoreded by review of medical records
Timepoint [2] 323265 0
Calculation of opioid consumption should be considered from initiation of surgery to postoperative 24h
Secondary outcome [3] 323266 0
Patient’s satisfaction is assessed with a 10-point numerical rating scale: 10= excellent, 1= bad
Timepoint [3] 323266 0
Patient’s satisfaction is evaluated on postoperative 24h
Secondary outcome [4] 323267 0
The incidence of postoperative nausea and vomiting is assessed by verbal self-report by participant.
Timepoint [4] 323267 0
Every participant would be asked the incidence of nausea and vomiting during postoperative 24h

Key inclusion criteria
Age 18 to 60years
ASA physical status were I or II
Body mass index were between 18 and 35 kg/m2
Scheduled for arthroscopic knee surgery
Minimum age
18 Years
Maximum age
60 Years
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
Have history of allergic to local anesthetics, opioid drug or alcohol abuse, intake of any analgesic drug within 48 h before surgery, any signs of infection in the vicinity of the place of acupuncture treatment

Study design
Purpose of the study
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Treatment allocations were concealed with opaque envelopes, which only assistant who dispensing local anesthetic could open.Treatment allocations were assigned to either the ACB group or the control group
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
participants were randomized by using a Excel-generate random code
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s
The people administering the treatment/s
The people assessing the outcomes
The people analysing the results/data
Intervention assignment
Other design features
Phase 4
Type of endpoint(s)
Statistical methods / analysis
Statistical analysis were assessed with the use of SPSS version 20.0 (SPSS Inc., Chicago, IL, USA). The normality of distribution was estimated by the Kolmogorov–Smirnov test. Parametric data were expressed as the mean[standard deviation (SD)] and were compared in a t test .Nonparametric data were presented as median[interquartile range (IQR)] and assessed by using the Mann–Whitney test. Categorical variables were expressed as the number of patients (%) and mean values were compared in x2 test or Fisher exact test as appropriate. All reported P-values are two-tailed, and at a 5% level of significance.
The sample size evaluation was based the global QoR-40 scores on our pilot study. In a previous study, we accepted a 10-point difference performs a clinically relevant difference in quality of recovery. Based on the result of previous study, sample size per group were assessed that 28 subjects would be sufficient with a = 0.05 and a power of 80%. Taking into account an expected lost or follow-up data rate of 10%, the final sample size was 62 patients.

Recruitment status
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment outside Australia
Country [1] 7843 0
State/province [1] 7843 0

Funding & Sponsors
Funding source category [1] 293476 0
Self funded/Unfunded
Name [1] 293476 0
Yusheng Yao
Address [1] 293476 0
No.134 Dongjie Street,Fujian Provincial Hospital. Fuzhou, Fujian, China, 350001
Country [1] 293476 0
Primary sponsor type
Yusheng Yao
No.134 Dongjie Street, Fujian Provincial Hospital.Fuzhou, Fujian, China, 350001
Secondary sponsor category [1] 292300 0
Name [1] 292300 0
Fujian Provical Hospital
Address [1] 292300 0
No.134 Dongjie Street,Fujian Provincial Hospital. Fuzhou, Fujian, China, 350001
Country [1] 292300 0

Ethics approval
Ethics application status
Ethics committee name [1] 295224 0
The Biological-Medical Ethical Committee of Fujian Provincial Hospital
Ethics committee address [1] 295224 0
No.134, Dongjie, Fujian Provincial Hospital, Fuzhou, Fujian, China, 350004.
Ethics committee country [1] 295224 0
Date submitted for ethics approval [1] 295224 0
Approval date [1] 295224 0
Ethics approval number [1] 295224 0

Brief summary
Arthroscopic knee surgery patients may experience discomfort, distress and pain following surgery with approximately 70% incidence of postoperative moderate-to-severe pain reported. These factors could affect the recovery of patients and extend discharge. Many studies have indicated that femoral nerve block(FNB) could relieve pain after anterior cruciate ligament reconstruction. However, FNB has been associated with quadriceps weakness, the risk of falling and delayed mobilization. In recent years, the adductor canal block(ACB) was shown to relieve pain and reduce morphine consumption after arthroscopic knee surgery with minor effects on muscle strength. A meta-analysis indicated that ACB provides better ambulation ability and pain control when compared with FNB and improve functional recovery after total knee arthroplasty. Although these advantages should be evaluated, the effects of ACB on the quality of recovery from patient’s perspective were not documented. The aim of the current trial was to assess the effect of pre-operative ultrasound-guided ACB on the quality of recovery after arthroscopic knee surgery.
Trial website
Trial related presentations / publications
Public notes
Attachments [1] 927 927 0 0

Principal investigator
Name 65482 0
Prof Yusheng Yao
Address 65482 0
No.134 Dongjie Street,Fujian Provincial Hospital.Fuzhou, Fujian, China, 350001
Country 65482 0
Phone 65482 0
Fax 65482 0
Email 65482 0
Contact person for public queries
Name 65483 0
Prof Yusheng Yao
Address 65483 0
No.134 Dongjie Street,Fujian Provincial Hospital. Fuzhou, Fujian, China, 350001
Country 65483 0
Phone 65483 0
Fax 65483 0
Email 65483 0
Contact person for scientific queries
Name 65484 0
Prof Yusheng Yao
Address 65484 0
No.134 Dongjie Street,Fujian Provincial Hospital. Fuzhou, Fujian, China, 350001
Country 65484 0
Phone 65484 0
Fax 65484 0
Email 65484 0

No information has been provided regarding IPD availability
Summary results
Have study results been published in a peer-reviewed journal?
Other publications
Have study results been made publicly available in another format?
Results – basic reporting
Results – plain English summary