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Trial registered on ANZCTR

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

Titles & IDs
Public title
Non-guided hip injections are a safe and accurate method of treatment for patients undergoing hip arthroscopy due to Femeroacetabular Impingement (FAI)
Scientific title
To evaluate the efficacy of the anterior approach for blind intra-articular hip injections in patients undergoing hip arthroscopy due to Femoroacetabular Impingement (FAI)
Secondary ID [1] 281029 0
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
(Femoroacetabular Impingement) 287165 0
Condition category
Condition code
Musculoskeletal 287488 287488 0 0
Other muscular and skeletal disorders
Surgery 287489 287489 0 0
Other surgery

Study type
Description of intervention(s) / exposure
Treatment group will have a 19G spinal needle inserted into the anterior hip joint and followed by an air arthrogram (10ml of air inserted through needle). This air will enable the braking of the suction seal of the joint to enable traction, without which the surgery cannot commence. The position of the needle would then be verified by fluoroscopy. This process will take approximately 3-4 minutes and will be immediately followed by the commencement of the patient's scheduled hip arthroscopy surgery.
Intervention code [1] 285489 0
Treatment: Other
Comparator / control treatment
Nil control group
Control group

Primary outcome [1] 287748 0
To validate the anterior hip injection technique without imaging guidance by showing it to be safe and yield high accuracy. Clinical assessment for all patients shall be made on enrollment, and at
7 days and 12 weeks post surgery. The clinical assessment will be according to the investigators physical exam, assessing (and measuring) patient's range of motion, mechanical symptoms,
pain and full neuro-vascular status. Possible side effects attributed to needle placement (sensation disturbance) will be monitored closely.
Timepoint [1] 287748 0
7 days, 12 weeks
Secondary outcome [1] 298777 0
Timepoint [1] 298777 0

Key inclusion criteria
Male or female patients aged between 18-50
healthy patients undergoing hip arthroscopy due to FAI
No previous total hip replacement surgery
Minimum age
18 Years
Maximum age
50 Years
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
a) Patients with relative or proven dysplastic hip joints determined by CE angle and/or extreme version abnormalities as measured on apical CT/MR cuts and pelvic XR.

b) patients with an artificial joint (Total hip replacement)

Study design
Purpose of the study
Allocation to intervention
Non-randomised trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Patients who have elected to undergo a hip arthroscopy procedure due to labral or cartilage pathologies resulting from Femoroacetabular impingement. Patients meeting the primary inclusion criteria and whom agree to enroll in the study would constitute the study population.

Full verbal and written information regarding the trial and treatment. Screening forms completed along with demographic data and clinical examination and baseline outcome measures documented.
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Who is / are masked / blinded?

Intervention assignment
Single group
Other design features
Not Applicable
Type of endpoint(s)
Statistical methods / analysis

Recruitment status
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment in Australia
Recruitment state(s)

Funding & Sponsors
Funding source category [1] 285817 0
Self funded/Unfunded
Name [1] 285817 0
Dr David Young
Address [1] 285817 0
33 The Avenue
Windsor 3181 VIC
Country [1] 285817 0
Primary sponsor type
Dr David Young
33 The Avenue
Windsor 3181 VIC
Secondary sponsor category [1] 284642 0
Name [1] 284642 0
Dr Brett Moreira
Address [1] 284642 0
33 The Avenue
WIndsor 3181 VIC
Country [1] 284642 0

Ethics approval
Ethics application status
Ethics committee name [1] 287829 0
The Avenue Hospital Ethics Committee
Ethics committee address [1] 287829 0
The Avenue Hospital
40 The Avenue
Windsor VIC 3181
Ethics committee country [1] 287829 0
Date submitted for ethics approval [1] 287829 0
Approval date [1] 287829 0
Ethics approval number [1] 287829 0
Trial 131

Brief summary
Lately, a new method for intraarticular hip injection has been increasingly considered, and is believed to be very accurate, eliminating the need for imaging assistance (which enables the surgeon to apply the treatment in an outpatient environment).

This blind method of injection will be assessed by:
1. Injecting small amount of air into the hip prior to hip arthroscopy surgery in the operating theatre, in the same technique as it is performed on a regular basis, but via a different approach (anterior versus lateral) and initially with no image assistance. The location of the needle will then be assessed using fluoroscopy.

2. Injecting small amount of Methylene Blue into the hip prior to total hip replacement surgery, verifying its location and injection accuracy later during the same operation.

Our hypothesis is that anterior hip injection technique, without imaging guidance, would yield high accuracy rates. Hip injections able to be performed without imaging will also lead to less expense for the patient and community with a reduction in burden on imaging services.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 34578 0
Address 34578 0
Country 34578 0
Phone 34578 0
Fax 34578 0
Email 34578 0
Contact person for public queries
Name 17825 0
Dr Brett Moreira
Address 17825 0
33 The Avenue
Windsor 3181 VIC
Country 17825 0
Phone 17825 0
+61 402344463
Fax 17825 0
Email 17825 0
Contact person for scientific queries
Name 8753 0
Dr Brett Moreira
Address 8753 0
33 The Avenue
Windsor 3181 VIC
Country 8753 0
Phone 8753 0
+61 402344463
Fax 8753 0
Email 8753 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