関連する実験動画
Updated: Feb 14, 2026

06:47
Microfluidics in Assessing Platelet Function
Published on: November 8, 2024
1.7K
トラマドールと血小板機能への影響 - 活体研究
Philipp Zoidl1, Helmar Bornemann-Cimenti1, Michael Eichinger1
1Department of Anesthesiology and Intensive Care Medicine, Medical University of Graz, Graz, Austria.
Hamostaseologie
|February 12, 2026
まとめ
トラマドール (鎮痛剤) は,健康な個体では血小板の集積に有意な影響を及ぼさない. この研究では,血小板機能への影響は認められず,出血リスクに関する安全性プロファイルが好ましいことを示唆しています.
科学分野:
- 薬理学 薬理学とは
- 血液学 ヘマトロジ
- クリニカル・メディシン 臨床医学
背景:
- トラマドールは,μ-オピオイド受容体アゴニスト活性を持つ広く使用される鎮痛剤です.
- トラマドールはまた,セロトニンとノルアピネフリンの再吸収を阻害し,血小板機能に影響を与える可能性があります.
- トラマドールが血小板集約に与える影響は,セロトニン再吸収阻害剤とは異なり,十分に文書化されていません.
研究 の 目的:
- トラマドールが血小板機能と結集に及ぼす効果を調査する.
- トラマドールが治療的および超治療的濃度で血小板の集積を阻害するかどうかを判断する.
主な方法:
- 健康なボランティアを対象とした実験室での研究.
- 光伝達アグレゴメトリーを用いた血小板集積のex vivo評価.
- トラマドール添加後にアデノシン・ディフォスファート (ADP),リストセチン,およびトロンビン受容体活性化ペプチド (TRAP) によって誘発された血小板の集積.
主要な成果:
- トラマドールの様々な濃度 (0-9000 ng/mL) において,血小板集積率の有意な差異は観察されなかった.
- トラマドールは,ADP,リストセチン,またはTRAPによって誘発された場合,血小板機能を損なわなかった.
- 7人の健康なボランティアが最終分析に含まれました.
結論:
- トラマドールは,試験濃度で健康な個体において血小板機能を有意に低下させない.
- これらの発見は,血小板の集積に関するトラマドールの一般的な安全性プロファイルを支持します.
- より大きなコホートでのさらなる研究は,結果を確認し,個体間の変動性を調査するために必要です.
関連する概念動画
Structure and Function of Platelets
3.8K
The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...
3.8K
Formation of the Platelet Plug
9.5K
The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
9.5K
Serum Studies: Renal Function Tests
460
Renal function tests are crucial for assessing kidney health, monitoring disease progression, and evaluating the kidneys' efficiency in waste elimination, fluid balance, and electrolyte regulation. These tests offer critical insights into kidney function, even though routine measurements may appear normal until there is a significant decline in the glomerular filtration rate or GFR. Typically, signs of kidney impairment only become evident when the GFR falls to about 50% of its normal level.
460
The Influence of Affect on Cognition
305
Positive affect significantly influences cognitive processes, including evaluation, memory, creativity, and social judgments. Compared to negative affect, positive emotional states promote more favorable interpretations of stimuli, cognitive flexibility, and heuristic processing. These effects highlight emotions' powerful role in shaping how individuals perceive, remember, and interact with the world.Influence on Evaluation and AttributionWhen individuals experience positive affect, they are...
305
The Influence of Cognition on Affect
232
Cognition plays a pivotal role in shaping emotional experiences, as demonstrated by Schachter and Singer’s two-factor theory of emotion. According to this model, emotion arises from a combination of physiological arousal and cognitive interpretation. The body’s physiological response to stimuli is ambiguous and only gains emotional significance through cognitive labeling. For instance, an increased heart rate and adrenaline surge while standing near an attractive person may be...
232
Bioavailability: Influencing Factors
405
Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...
405

