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Systèmes sanguin et immunitaire
Système immunitaire
Phagocytes
Granulocytes neutrophiles
Granulocytes neutrophiles : Questions médicales fréquentes
Termes MeSH sélectionnés :
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"description": "Comment diagnostiquer une neutropénie ?\nQuels tests pour évaluer la fonction des neutrophiles ?\nQuels signes indiquent une infection bactérienne ?\nComment évaluer une inflammation ?\nQuel rôle des neutrophiles dans le diagnostic ?",
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"name": "Comment diagnostiquer une neutropénie ?",
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"text": "Un hémogramme permet de mesurer le nombre de neutrophiles dans le sang."
}
},
{
"@type": "Question",
"name": "Quels tests pour évaluer la fonction des neutrophiles ?",
"position": 2,
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"text": "Des tests de phagocytose et de dégranulation peuvent être réalisés."
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"@type": "Question",
"name": "Quels signes indiquent une infection bactérienne ?",
"position": 3,
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"text": "Fièvre, frissons, et augmentation des neutrophiles dans le sang sont des indicateurs."
}
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"@type": "Question",
"name": "Comment évaluer une inflammation ?",
"position": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des marqueurs comme la protéine C-réactive et la vitesse de sédimentation sont utilisés."
}
},
{
"@type": "Question",
"name": "Quel rôle des neutrophiles dans le diagnostic ?",
"position": 5,
"acceptedAnswer": {
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"text": "Ils sont souvent mesurés pour évaluer la réponse immunitaire et détecter des infections."
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{
"@type": "Question",
"name": "Quels symptômes d'une infection aiguë ?",
"position": 6,
"acceptedAnswer": {
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"text": "Fièvre, douleur, rougeur et gonflement au site d'infection sont fréquents."
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{
"@type": "Question",
"name": "Comment reconnaître une neutropénie ?",
"position": 7,
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"text": "Les infections fréquentes et des symptômes comme la fatigue peuvent indiquer une neutropénie."
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{
"@type": "Question",
"name": "Quels signes d'inflammation ?",
"position": 8,
"acceptedAnswer": {
"@type": "Answer",
"text": "Rougeur, chaleur, douleur et gonflement sont des signes typiques d'inflammation."
}
},
{
"@type": "Question",
"name": "Quels symptômes d'une septicémie ?",
"position": 9,
"acceptedAnswer": {
"@type": "Answer",
"text": "Fièvre élevée, confusion, et hypotension peuvent indiquer une septicémie."
}
},
{
"@type": "Question",
"name": "Quels symptômes d'une infection virale ?",
"position": 10,
"acceptedAnswer": {
"@type": "Answer",
"text": "Symptômes comme la toux, la fatigue et les douleurs musculaires peuvent survenir."
}
},
{
"@type": "Question",
"name": "Comment prévenir les infections ?",
"position": 11,
"acceptedAnswer": {
"@type": "Answer",
"text": "Une bonne hygiène, des vaccinations et éviter les contacts avec des malades sont essentiels."
}
},
{
"@type": "Question",
"name": "Quel rôle de l'alimentation ?",
"position": 12,
"acceptedAnswer": {
"@type": "Answer",
"text": "Une alimentation équilibrée renforce le système immunitaire et aide à prévenir les infections."
}
},
{
"@type": "Question",
"name": "Comment éviter la neutropénie ?",
"position": 13,
"acceptedAnswer": {
"@type": "Answer",
"text": "Éviter les médicaments immunosuppresseurs et surveiller les maladies héréditaires."
}
},
{
"@type": "Question",
"name": "Quels conseils pour les patients neutropéniques ?",
"position": 14,
"acceptedAnswer": {
"@type": "Answer",
"text": "Éviter les foules, se laver les mains fréquemment et cuire les aliments correctement."
}
},
{
"@type": "Question",
"name": "Comment gérer le stress pour la santé ?",
"position": 15,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des techniques de relaxation et d'exercice régulier peuvent aider à réduire le stress."
}
},
{
"@type": "Question",
"name": "Comment traiter une neutropénie ?",
"position": 16,
"acceptedAnswer": {
"@type": "Answer",
"text": "Le traitement peut inclure des facteurs de croissance hématopoïétiques et des antibiotiques."
}
},
{
"@type": "Question",
"name": "Quels antibiotiques pour infections bactériennes ?",
"position": 17,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les antibiotiques comme la pénicilline ou les céphalosporines sont souvent prescrits."
}
},
{
"@type": "Question",
"name": "Quel rôle des corticostéroïdes ?",
"position": 18,
"acceptedAnswer": {
"@type": "Answer",
"text": "Ils peuvent réduire l'inflammation et aider à traiter certaines maladies auto-immunes."
}
},
{
"@type": "Question",
"name": "Comment gérer une septicémie ?",
"position": 19,
"acceptedAnswer": {
"@type": "Answer",
"text": "Un traitement urgent avec des antibiotiques et des fluides intraveineux est crucial."
}
},
{
"@type": "Question",
"name": "Quels traitements pour infections virales ?",
"position": 20,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les antiviraux et les soins de soutien sont utilisés pour traiter les infections virales."
}
},
{
"@type": "Question",
"name": "Quelles complications d'une neutropénie ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les infections graves et les septicémies sont des complications fréquentes de la neutropénie."
}
},
{
"@type": "Question",
"name": "Quels risques d'infections récurrentes ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les patients neutropéniques sont plus susceptibles de développer des infections récurrentes."
}
},
{
"@type": "Question",
"name": "Comment la septicémie évolue-t-elle ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Sans traitement, la septicémie peut entraîner un choc septique et la mort."
}
},
{
"@type": "Question",
"name": "Quelles conséquences d'une infection non traitée ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "Une infection non traitée peut se propager et causer des dommages organiques graves."
}
},
{
"@type": "Question",
"name": "Quels effets secondaires des traitements ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les traitements peuvent entraîner des effets secondaires comme des nausées et des infections."
}
},
{
"@type": "Question",
"name": "Quels facteurs augmentent le risque de neutropénie ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les traitements anticancéreux, certaines infections et maladies auto-immunes augmentent le risque."
}
},
{
"@type": "Question",
"name": "Quel impact de l'âge sur les neutrophiles ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les personnes âgées peuvent avoir une diminution naturelle du nombre de neutrophiles."
}
},
{
"@type": "Question",
"name": "Comment les maladies héréditaires influencent-elles ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Certaines maladies génétiques peuvent affecter la production de neutrophiles."
}
},
{
"@type": "Question",
"name": "Quel rôle des infections virales ?",
"position": 29,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les infections virales peuvent temporairement réduire le nombre de neutrophiles."
}
},
{
"@type": "Question",
"name": "Quels comportements à risque ?",
"position": 30,
"acceptedAnswer": {
"@type": "Answer",
"text": "Le tabagisme et une mauvaise hygiène de vie augmentent le risque d'infections."
}
}
]
}
]
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Assessing muscle flexibility and architecture is important for hamstring strain injury (HSI) prevention. We investigated the relationship between shear modulus and passive force in hamstring muscles a...
The biceps femoris long head (BFlh), semitendinosus (ST), and semimembranosus (SM) muscles were dissected from nine Thiel-embalmed cadavers and fixed to a custom-made mechanical testing machine. Calib...
The shear modulus and passive force for all hamstring muscles in each region showed a statistically significant linear correlation. Furthermore, the increase in shear modulus slope was greater for BFl...
The local mechanical properties of individual hamstring muscles can be indirectly estimated using SWE, and the slope of increase in shear modulus reflects characteristics of the muscle architecture....
The structural and functional differences of individual hamstrings have not been sufficiently evaluated. This study aimed to clarify the morphological architecture of the hamstrings including the supe...
Endurance capability in the muscles controlling the knee is poorly understood post anterior cruciate ligament (ACL) reconstruction, despite many sporting activities requiring notable muscle endurance....
To assess whether ACL reconstruction (ACLR) with a hamstring graft leads to reduced hamstring endurance 9-13 months post-surgery....
A cross-sectional inter-limb comparison study was undertaken with participants 9-13 months after an ACLR with a hamstring graft, and a group of age, sex, and activity-matched controls. There were 22 p...
Submaximal hamstring endurance was measured using a progressive fatigue test on an isokinetic dynamometer at a joint angular velocity of 120°/second. The dependant variable was the maximum number of r...
There was a significant (p < 0.05) deficit in hamstring endurance observed between the injured leg (mean: 111 repetitions, SD 49) and uninjured leg (mean: 136 repetitions, SD 67) of the ACL group, but...
The 18% deficit in submaximal hamstring endurance across the ACL-reconstructed individual's limbs is indicative of a notable loss in muscle performance at 9-13 months post-surgery. These results provi...
The purpose of this study was to investigate the relationship between muscular parameters of quadriceps/hamstrings and knee joint kinetics in gait. Muscle architecture (thickness, pennation angle, and...
The effects of static stretching are influenced by prescribed and applied loads of stretching. The prescribed load is calculated from the stretching duration and intensity, whereas the applied load is...
To evaluate the effect of a Nordic hamstring exercise or Diver hamstring exercise intervention on biceps femoris long head, semitendinosus and semimembranosus muscle's fascicle length and orientation ...
In this three-arm, single-center, randomized controlled trial, injury-free male basketball players were randomly assigned to a Nordic, Diver hamstring exercise intervention or control group. The prima...
Fifty-three participants were included for analysis (mean age 22 ± 7 years). Fascicle length in the semitendinosus over 12 weeks significantly increased in the Nordic-group (mean [M]: 20.8 mm, 95% con...
The Nordic hamstring exercise intervention did significantly increase the fascicle length of the semitendinosus and the Diver hamstring exercise intervention did significantly change the orientation o...
MRI examinations are accurate for diagnosing sports-related acute hamstring injuries. However, sensitive imaging methods for assessing recovery of these injuries are lacking. Diffusion tensor imaging ...
This study aimed to characterize muscle activity in male soccer players with a history of hamstring strain injuries (HSI) during accelerated sprinting. Thirteen patients each in the HSI group (history...
The present study investigated the mechanisms of neuromuscular fatigue in quadriceps and hamstring muscles and its consequences on the torque-duration relationship....
Twelve healthy men performed a 5-min all-out exercise (3-s contraction, 2-s relaxation) with either quadriceps or hamstring muscles on separate days. Central fatigue and peripheral fatigue were quanti...
After exercise, maximal voluntary contraction (MVC) decreased to a greater magnitude ( P < 0.001) in quadriceps (-67% ± 9%) compared with hamstring (-51% ± 10%). ∆P Tw was also greater in quadriceps c...
These findings revealed that hamstring presented different etiology and magnitude of neuromuscular fatigue compared with quadriceps. The absence of correlation observed between quadriceps and hamstrin...
Hamstring strain injuries may occur due to differential fatigue and compromised mechanical properties among the hamstring muscles. We examined (1) the effect of fatigue on hamstrings active muscle sti...
Nine healthy males completed 99 submaximal knee flexions in isometric (ISO), concentric (CON), and eccentric (ECC) conditions. We measured the knee flexor maximal voluntary torque (MVT) (pre/post), sh...
MVT decreased substantially after all conditions (- 18.4 to - 33.6%). The average relative torque sustained during the task was lower in CON than ISO and ECC, but absolute torque was similar. SWV inte...
Fatigue has a differential effect on the mechanical properties of the constituent hamstring muscles, as measured with shear wave elastography, depending upon contraction type. We found preliminary evi...