Yohei Kobayashi

Yohei Kobayashi


Prominent publications by Yohei Kobayashi

KOL Index score: 11938

BACKGROUND: Platelet-rich plasma (PRP) therapy has become an increasingly popular treatment for orthopaedics and sports-related injuries, and various clinically available PRP preparation methods exist. However, the differences in PRP quality among numerous preparation methods remain unclear. Specifically, the benefit of including leukocytes in the PRP product remains controversial, and few studies have been conducted to evaluate the effects of the interaction between platelets and ...

Known for Growth Factor |  Rich Plasma |  Platelet Concentration |  Leukocytes Prp |  Leukocyte Count
KOL Index score: 10092

PurposeDespite objectively good results, up to 70 % of individuals may not return to their pre-injury level of sports activity after anterior cruciate ligament (ACL) reconstruction surgery. Although psychological responses have been shown to affect outcomes after ACL injury, an appropriate means of measuring their effects, in addition to functional status, has not been determined. The purpose of this study was to develop a patient-reported questionnaire for measuring psychological ...

Known for Cruciate Ligament |  Acl Injury |  Reliability Validity |  Reported Outcome |  Psychological Factors
KOL Index score: 9224

Background and purposePsychological factors including fear of pain, re-injury during movement (kinesiophbia) affect return-to-sport rates after anterior cruciate ligament (ACL) reconstructive surgery. Clinicians often encounter in the daily practice that athletes explain lack of self-confidence or psychological readiness during the sports activity. The Tampa Scale for Kinesiophobia (TSK) has been used to evaluate psychological outcomes in patients with ACL injuries in many countries and ...

Known for Tampa Scale |  Acl Injuries |  Japanese Version |  Kinesiophobia Tsk |  Validity Responsiveness
KOL Index score: 7624

BACKGROUND: Using intra-operative findings and clinical results, including return to play (RTP) at the pre-injury level, this study investigated the causes of primary graft failure after revision anterior cruciate ligament (ACL) reconstruction with bone-patellar-tendon-bone (BPTB) autografts.

METHODS: A total of 54 patients were followed for a mean of 38.2 ± 10.2 months post-surgery. Subjective and objective results were evaluated using single assessment numeric evaluation (SANE) scores, ...

Known for Anterior Cruciate |  Patellar Tendon |  Ligament Reconstruction |  Preinjury Level |  Revision Surgery
KOL Index score: 7111

PurposeTo identify unknown risk factors associated with fifth metatarsal stress fracture (Jones fracture).MethodsA case–controlled study was conducted among male Japanese professional football (soccer) players with (N = 20) and without (N = 40) a history of Jones fracture. Injury history and physical examination data were reviewed, and the two groups were compared. Univariate and multivariate logistic regression controlling for age, leg dominance and body mass index were used to obtain ...

Known for Jones Fracture |  Hip Internal Rotation |  Football Players |  Metatarsal Stress |  Soccer Young
KOL Index score: 5910

OBJECTIVES: Over a 11-year period, we investigated the incidence of anterior cruciate ligament (ACL) injuries and the clinical outcomes after ACL reconstruction with hamstring autografts in two homogenous cohorts of rugby players.

METHODS: Two teams, including those in elite (94 players) and high school (290 players) clubs, were followed.

RESULTS: Isolated ACL injuries occurred in 28 players (12 elite, 16 high school). The incidence during match play was 1.26 per 1000 player-hours (95% ...

Known for Cruciate Ligament |  Rugby Players |  Acl Reconstruction |  Incidence Anterior |  Football Humans
KOL Index score: 5372

Introduction: Researchers have investigated the use of platelet-rich plasma (PRP) therapy. However, the mechanisms through which PRP affects tissue repair remain unclear. We hypothesize that PRP promotes tissue repair through not only via direct manner on the local cells but also via indirect manner that encourage the recruitment of reparative cells such as macrophages (MPs), and it depends on the quality of PRP including the concentration of leukocytes. The aim of this study is to ...

Known for Tendon Healing |  Rich Plasma |  Tissue Repair |  Prp Leukocyte
KOL Index score: 3880

BACKGROUND: Acute patellar tendon ruptures with poor tissue quality. Ruptures that have been neglected are difficult to repair. Several surgical techniques for the repair of the patellar tendon have been reported, however, these techniques remain difficult because of contractures, adhesions, and atrophy of the quadriceps muscle after surgery.

CASE PRESENTATION: We report the cases of 2 Japanese patients (Case 1: a 16-year-old male and Case 2: a 43-year-old male) with patellar tendon ...

Known for Patellar Tendon |  Case Presentation |  Quadriceps Muscle |  Knee Injuries |  Semitendinosus Gracilis
KOL Index score: 2729

INTRODUCTION: Knee osteoarthritis (KOA), the most common form of osteoarthritis (OA) is a considerable health concern worldwide. Platelet-rich plasma (PRP) is a common therapeutic option for KOA. Different types of PRPs have varying efficacies. However, a comparative analysis of the qualities of these PRPs is lacking.

METHODS: Two types of PRPs, including autologous protein solution (APS), and leukocyte-poor PRP (LP-PRP) along with whole blood (WB) and platelet-poor plasma (PPP) were ...

Known for Knee Osteoarthritis |  Rich Plasma |  Lp Prp |  Leukocyte Poor
KOL Index score: 2312

PURPOSE: Although platelet-rich plasma (PRP) therapy has become an increasingly popular treatment for sports-related injuries, the molecular mechanisms of PRP on tissue healing process remain poorly understood. The aim of the present study was to develop an experimental method quantifying the efficacy of PRP with murine patellar tendon injury model, leading to future elucidation of the mechanisms of PRP on healing processes.

METHODS: Full-thickness defects were created in the central ...

Known for Tendon Healing |  Rich Plasma |  Sportsrelated Injuries |  Collagen Fibers |  Effects Prp
KOL Index score: 2158

Introduction: Platelet-rich plasma (PRP) therapy is used to treat pathological conditions such as degenerative inflammatory diseases including osteoarthritis (OA) by enhancing tissue repair and promoting anti-inflammatory effects. Although PRP therapy for patients with knee OA improved pain and functional scores, the association of clinical outcomes and quality of PRP including cell composition and concentration is unclear.

Methods: Therefore, this study analyzed blood cell counts, ...

Known for Knee Osteoarthritis |  Rich Plasma
KOL Index score: 1721

There has recently been growing interest worldwide in biological therapies such as platelet-rich plasma injection for the treatment of knee osteoarthritis. However, predicting the effectiveness of platelet-rich plasma therapy remains uncertain. Therefore, this retrospective cohort study was performed to assess a range of predictors for the effectiveness of platelet-rich plasma therapy in treating knee osteoarthritis. The study included 517 consecutive patients who underwent three ...

Known for Knee Osteoarthritis |  Rich Plasma |  Responder Rate |  Poor Platelet |  Multivariate Logistic


Yohei Kobayashi: Influence Statistics

Sample of concepts for which Yohei Kobayashi is among the top experts in the world.
Concept World rank
types prps #5
pdgfbb cytokines #5
moderate kl2 #5
μl koa #5
aps pdgfbb #5
osteoarthritis kl4 #5
aps lpprp #5
mild kl2 #5
types plateletrich plasma #5
koa aps #5
aps lp #5
il1ra il1β aps #5
severe kl4 #5
type koa #5
lpprp aps #5
koa types #5
kl4 koa #5
μl koa patients #5
aps koa patients #5
μl retrospective #5
standing plain radiographs #5
μl aps #5
aps koa #5
lrprp lpprp groups #6
lrprp postoperative day #6
lpprp collagen arrangement #6
week b6129p #6
osteoarthritis multivariate #6
cx3cr1tm1litt #6
lpprp day #6
cx3cr1tm1litt mice #6
tendon healing recruitment #6
prp recruited #6
recruitment reparative #6
mps repair tissue #6
arrangement postoperative #6
postoperative day lpprp #6
cx3cr1tm1litt mouse #6
tendon healing lrprp #6
b6129p cx3cr1tm1litt #6
prp classified #6
mps depends #7
healing bonar #7
aps leukocyte #7
players jones #7
variables bonar score #7
variables bonar #7
treating knee osteoarthritis #7
prp tissue repair #7
lpprp tendon healing #7

Key People For Jones Fracture

Top KOLs in the world
Joseph S Torg
cervical spine national football head spinal stenosis
Russell R Zelko
proximal diaphyseal fractures metatarsal distal functional significance
R Jones
general practice advanced ligo gravitational waves
stress fractures acr appropriateness criteria cervical spine
Frederick C Balduini
coracoid fracture osteoid osteoma compartment pressure
Marianne Das
national football head cervical quadriplegia posterior cruciate ligament

Yohei Kobayashi:Expert Impact

Concepts for whichYohei Kobayashihas direct influence:Jones fracture,  Patellar tendon,  Tendon healing,  Anterior cruciate,  Cruciate ligament,  Acl injuries,  Leukocyte concentration,  Rich plasma.

Yohei Kobayashi:KOL impact

Concepts related to the work of other authors for whichfor which Yohei Kobayashi has influence:Rich plasma,  Growth factors,  Patellar tendon,  Anterior cruciate,  Acl reconstruction,  Soccer players,  Knee osteoarthritis.



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Department of Sports and Regenerative Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;, yhkobaya@juntendo.ac.jp, (Y.K.);, jmp4ubitj@gmail.com, (H.N.);, twakaya@juntendo.ac.jp, (T.W.);, s-fukusato@juntendo.ac.jp, (S.F.);,

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