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Trial registered on ANZCTR

Registration number
Ethics application status
Date submitted
Date registered
Date last updated
Date data sharing statement initially provided
Type of registration
Prospectively registered

Titles & IDs
Public title
Feasibility and Safety of the Extravascular Carotid Artery Pulse Modulation Device (The Pulse Modulation Study)
Scientific title
Feasibility and Safety of the Pulse Modulation Device in participants undergoing Surgery of the Common Carotid Artery (CCA) (The Pulse Modulation Study)
Secondary ID [1] 299616 0
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Pulse Pressure 314910 0
Alzheimer's disease 315206 0
Condition category
Condition code
Neurological 313264 313264 0 0
Alzheimer's disease
Surgery 313448 313448 0 0
Other surgery

Study type
Description of intervention(s) / exposure
A prospective, single arm feasibility study.

Participants already scheduled for Head and Neck surgery that involves exposure of the Common Carotid Artery (CCA) will be enrolled.

A small temporary cylindrical shaped device will be placed around the common carotid artery with the aim of modulating the characteristics of the arterial pulse. The surgeon will be responsible for placement. This modulation will be measured throughout the procedure by a ultrasound technician supporting the surgeon.

The intervention will be the temporary (up to 15 minute) unilateral placement of the device on one CCA during the course of the scheduled surgery. The application will occur mid procedure and observation will be made using tran cranial dopler imaging.
Intervention code [1] 315868 0
Treatment: Devices
Comparator / control treatment
No control group
Control group

Primary outcome [1] 321765 0
The short term (15 minutes maximum) unilateral temporary application of theextravascular carotid pulse modulation device around the CCA followed by the device’s successful removal.
• Temporary arterial pulse wave modulation measured by TCD/TCCD on the ipsilateral MCA.

Timepoint [1] 321765 0
Intraoperatively while device is applied (15 minutes).
Primary outcome [2] 321919 0
Emboli counts at screening, during the procedure and at day 30 followup.
Timepoint [2] 321919 0
Screening, Intraoperatively and Day 30 followup.
Primary outcome [3] 321920 0
30-day rate of local hematoma (related to device application) as defined by the BARC scoring system
Timepoint [3] 321920 0
30 days post-surgery
Secondary outcome [1] 376140 0
Acute device success (application of pulse modulation device and its subsequent removal, with video and photos).

Timepoint [1] 376140 0
Intraoperatively while device is applied (15 minutes).
Secondary outcome [2] 376891 0
Procedural success (application and subsequent removal of pulse modulation device and determination of arterial pulse wave dampening parameters). Assessed by clinical opinion, photos, video recording, etc documented in source worksheets intraoperatively.
Timepoint [2] 376891 0
Intraoperatively while device is applied (15 minutes).

Key inclusion criteria
Particppant must be greater or equal to 21 years of age.
Particopant has the ability to understand and cooperate with study procedures and agrees to a post-operative (day 1) and 30 day follow-up visit, tests and exams.
Participants taking warfarin may be included if their dosage is reduced before the procedure per clinical surgical standard of care determined by the surgeon. Warfarin may be restarted to therapeutic dose following the procedure per standard of care.
The participant must sign a written informed consent prior to the procedure, using a form that is approved by the local ethics committee.
The life expectancy of the participant is at least six months.
The participant must have high pulse pressure, greater than or equal to 50mm Hg (brachial, standard technique).
The participant has an ipsilateral trans-temporal window for TCD. If the contralateral window is present, then contralateral MCA flow will be calculated intra operatively.
The participant must have a minimum distance of at least 5 cm disease free CCA (no protuberant plaque on pre-operative ultrasound) between the clavicle and CCA bifurcation.
Intra-operative determination by the surgeon that the CCA is suitable for pulse modulation device placement.

Minimum age
21 Years
Maximum age
No limit
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
1. The participant is participating in another investigational trial that would interfere with the conduct or result of this study.
2. Female participants who are pregnant or may become pregnant.
3. The participant has dementia or a neurological illness at baseline that may confound the neurological evaluation.
4. The participant has known cardiac sources of emboli, for example (but not exclusively), left ventricular mural thrombus, prosthetic heart valves, left atrial myxoma.
5. The participant has documented chronic or paroxysmal atrial fibrillation within the prior 90 days.
6. Occlusion (TIMI 0 flow), or string sign of the ipsilateral CCA or internal carotid artery (ICA);.
7. There is evidence of bilateral carotid stenosis that would require contralateral carotid CEA, in the case of a scheduled CEA, within 30 days of procedure.
8. There is a planned treatment of an ipsilateral non-target lesion from the arch origin to the distal ICA within 30 days post procedure.
9. Requirement for coronary artery bypass graft (CABG) or percutaneous valve (TAVR) within 30 days of ipsilateral neck surgery.
10. There is a history of intracranial haemorrhage within the past 3 months, including haemorrhagic transformation of an ischemic stroke.
11. The participant has an intracranial tumour.
12. There is evidence of a stroke within the prior 30 days of the procedure.
13. There is a history of an ipsilateral stroke with fluctuating neurologic symptoms within one year of the procedure.
14. There is a history of spontaneous intracranial haemorrhage <12 months previously, or recent stroke < 7 days, or stroke of sufficient volume to render revascularization at increased risk of reperfusion injury (hyper perfusion/haemorrhagic stroke): 1/3rd of the ipsilateral MCA volume.
15. Evolving stroke.
16. The participant has any medical criteria that would place them at higher than average risk of stroke/death during the neck procedure to include:
a. Congestive Cardiac Failure AHA Class III – IV ;
b. Unstable angina;
c. Recent MI <72 hours;
d. Severe COPD; or
e. Pro-coaguable state to include malignancies that pre-dispose to carotid artery /carotid arterial patch thrombosis; see Life Expectancy,
17. Presence of any one of the following anatomic risk factors:

Study design
Purpose of the study
Allocation to intervention
Non-randomised trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Open (masking not used)
Who is / are masked / blinded?

Intervention assignment
Single group
Other design features
Not Applicable
Type of endpoint(s)
Statistical methods / analysis
As this is a first in human pilot study there is no specific statistical design.

Recruitment status
Not yet recruiting
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)
Recruitment hospital [1] 15030 0
Sir Charles Gairdner Hospital - Nedlands
Recruitment hospital [2] 15031 0
Royal Prince Alfred Hospital - Camperdown
Recruitment postcode(s) [1] 28316 0
6009 - Nedlands
Recruitment postcode(s) [2] 28317 0
2050 - Camperdown

Funding & Sponsors
Funding source category [1] 304093 0
Commercial sector/Industry
Name [1] 304093 0
Brain Protection Company
Address [1] 304093 0
52 Victoria Street Paddington NSW 2021
Country [1] 304093 0
Primary sponsor type
Commercial sector/Industry
Brain Protection Company
52 Victoria Street Paddington NSW 2021
Secondary sponsor category [1] 304302 0
Name [1] 304302 0
Address [1] 304302 0
Country [1] 304302 0

Ethics approval
Ethics application status
Ethics committee name [1] 304582 0
Sir Charles Gairdner and Osborne Park Health Care Group Human Research Ethics Committee
Ethics committee address [1] 304582 0
2nd Floor A Block
Hospital Avenue
NEDLANDS Western Australia 6009
Ethics committee country [1] 304582 0
Date submitted for ethics approval [1] 304582 0
Approval date [1] 304582 0
Ethics approval number [1] 304582 0

Brief summary
The purpose of this research is to explore the early safety and feasibility of a device that might eventually be useful in delaying progression of Alzheimer’s Disease.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 97470 0
A/Prof Associate Professor Shirley Jansen
Address 97470 0
Associate Professor Shirley Jansen
Sir Charles Gairdner Hospital
6th floor G block, Hospital Avenue
NEDLANDS Western Australia 6009
Country 97470 0
Phone 97470 0
+61 8 6151 0820
Fax 97470 0
Email 97470 0
Contact person for public queries
Name 97471 0
Mr Brad Sheehan
Address 97471 0
Five Corners Pty Ltd
13/76 Reserve Road Artarmon NSW 2064
Country 97471 0
Phone 97471 0
Fax 97471 0
Email 97471 0
Contact person for scientific queries
Name 97472 0
Mr Brad Sheehan
Address 97472 0
Five Corners
13/76 Reserve Road Artarmon NSW 2064
Country 97472 0
Phone 97472 0
Fax 97472 0
Email 97472 0

Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No/undecided IPD sharing reason/comment
What supporting documents are/will be available?
No other documents available
Summary results
No Results