The phrase "according to a defined protocol" is correct and usable in written English.
It can be used when referring to actions or procedures that are to be followed as specified by a particular set of rules or guidelines.
Example: "The experiment was conducted according to a defined protocol to ensure consistency and reliability in the results."
Alternatives: "in line with a specified protocol" or "following an established protocol."
6- Coronary angiography should be performed according to a defined protocol (call number, direct admission, ideally presence of an intensivist, post-procedure bed) (strong agreement).
As these rates may have been influenced by local publicity, we quantified incidence in a network of garden sites where diseased birds were searched for systematically according to a defined protocol throughout the study period.
Consideration of two independent data sets of bird mortality in Britain (i.e. (1) surveillance based opportunistically on unsolicited reports from members of the public and (2) systematic monitoring according to a defined protocol by our volunteer network) in combination enables us to maximise their relative benefits.
The conditions were everyday working conditions; technicians performed the scans according to a defined protocol.
Bisphosphonates were prescribed routinely for patients with bone metastases according to a defined protocol.
Sampling of fixed tissues was performed by the same investigator (PP) according to a defined protocol in 160 cases.
After baseline evaluation, regular follow-up assessments according to a defined study protocol were conducted.
MDCT was performed according to a defined pancreas protocol as four-phasic contrast-enhanced MDCT with thin slices at intervals of 1 mm [ 12].
Participants who reported pain in and around the foot in the past 12 months and provided written consent to further contact were invited to attend a research assessment clinic where weight-bearing dorso-plantar and lateral radiographs of each foot were obtained according to a defined standardised protocol.
One hundred and twenty-four patients underwent 663 planned MRI scans according to a defined follow-up protocol.
(ii) Perform Research: In this step the researcher performs the research according to the defined protocol.
