Browsing by Author "Kohler, Ryan"

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    A practical guide to the use of nutritional supplements in South Africa
    (2004) Meltzer, Shelly; Kohler, Ryan; Jakoet, Ismail; Noakes, Tim D
    Sportspersons should ensure that the decision to use a dietary supplement is a safe one. Unlike medicines, which are regulated by the Medicines Control Council, there is no governing body to control and regulate the supplement industry in South Africa. As a result many supplements may contain banned substances and there is a chance that not all the ingredients are accurately listed on the label of a supplement product. National and international sporting bodies place the responsibility of using supplements on the sportsperson. The legal clause ‘strict liability’ means that the sportsperson is responsible for any and all substances appearing in their urine and blood.
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    Correction to: The Use of Sideline Video Review to Facilitate Management Decisions Following Head Trauma in Super Rugby
    (Springer International Publishing, 2018-12-07) Gardner, Andrew J; Kohler, Ryan; McDonald, Warren; Fuller, Gordon W; Tucker, Ross; Makdissi, Michael
    In the original article [1] reference was made to the Hawk-Eye system having been used as the sideline operating system during the 2015 season.
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    The Use of Sideline Video Review to Facilitate Management Decisions Following Head Trauma in Super Rugby
    (Springer International Publishing, 2018-05-24) Gardner, Andrew J; Kohler, Ryan; McDonald, Warren; Fuller, Gordon W; Tucker, Ross; Makdissi, Michael
    Background Sideline video review has been increasingly used to evaluate risk of concussive injury during match play of a number of collision sports, with the view to reducing the incidence of match play concussion injuries. The purpose of this study was to evaluate the effectiveness of sideline video review for identifying and evaluating head impact events in Rugby Union. Methods All Australian teams’ 2015 Super Rugby season matches were studied. Meaningful head impact events (HIEs) were identified, comprising events identified and acted upon during matches and events identified through a post-season retrospective review. Video footage of each HIE was coded by two experienced independent sports medicine clinicians to evaluate management decisions made by match-day (MDD) and team doctors (TD). HIE incidences for matches with and without sideline video were compared, and the agreement between game-day video interpretation and the independent clinician opinion calculated. Results Seventy HIEs were identified in 83 matches (47 identified during matches and 23 identified post-season), equating to 42.5 HIEs per 1000 player match hours. When video review was available, an unnoticed HIE occurred once every 4.3 matches, compared to once every 2.3 matches when the sideline video review was unavailable. Of the 47 identified in-match HIEs evaluated by TD and MDD during the season, 18 resulted in an immediate and permanent removal, 28 resulted in temporary removal for an off-field assessment, and one resulted in the player continuing the game. Game-day head injury assessment process video decisions agreed with the independent clinician view in 72% of cases, κ = 0.49 (95% CI 0.38–0.59, weak agreement). Conclusions These findings suggest that access to sideline video review is an important supplementary component to identify potential concussions; however, there is a critical need for improved systems and processes to reduce the likelihood of missing an incident.