下肢血液动力学在下体负压的过程中,以及预先调节炼的影响
Skye H T Ling1, Jeremy N Cohen1, Tania J Pereira1
1Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, ON, Canada.
概括
身体下部负压 (LBNP) 导致下肢的流体转移和明显的动脉和静脉反应. 之前的轻量运动在LBNP期间并没有显著改变这些心血管适应.
科学领域:
- 心血管生理学心血管生理学
- 人体生理学 人体生理学
- 运动生理学 运动生理学
背景情况:
- 身体下部负压 (LBNP) 是模拟静态压力的模型.
- 对LBNP的中心心血管反应得到了充分记录,但下肢血管反应的理解较少.
- 方法上的局限性阻碍了在LBNP期间对外围血管调整的直接评估.
研究的目的:
- 直接量化下肢动脉和静脉对等级LBNP的反应.
- 为了研究先前轻度运动对这些血管反应的影响.
- 在模拟的低血压期间,描述下肢血管系统中的补偿机制.
主要方法:
- 利用超声波测量血液流量和直径在深股骨静脉和表面股骨动脉.
- 采用张力计囊造影来测量小牛体积的变化.
- 健康的成年人接受了等级的LBNP (-20和-40毫米度) 后,躺卧休息或15分钟轻度骑自行车.
主要成果:
- 在LBNP期间,小牛体积显著增加,表明流体转移.
- 低至40mmHg的LBNP降低了深部大腿静脉和表面大腿动脉的血流.
- LBNP增加了深股骨静脉直径,表明静脉容量发生了变化.
- 之前的轻量运动没有显著改变下肢对LBNP的血管反应.
结论:
- 下肢动脉和静脉对由LBNP引起的中央低血压产生明显的补偿反应.
- 短期,轻度强度的运动似乎不会在LBNP期间改变周围血流调节.
- 这些发现提供了在LBNP期间下肢血管调整的详细描述,并为未来的研究提供了信息.
相关概念视频
01:10Pre-Procedural Guidelines for Assessing Blood Pressure
815
Accurate blood pressure assessment is crucial for diagnosing and managing various health conditions. To ensure the reliability of these measurements, healthcare professionals must adhere to standardized pre-procedural guidelines. These guidelines enhance patient safety and improve the overall quality of healthcare. The following steps are essential for obtaining accurate and consistent blood pressure readings, from using the appropriate tools to ensuring effective communication with the...
815
01:21Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation
358
Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
358
01:23Peripheral Artery Disease V: Postoperative Nursing Management
376
During the postoperative period, it is crucial to focus on maintaining circulation, identifying and managing potential complications, and planning for discharge.Nursing AssessmentVital signs monitoring: Regularly monitor vital signs, including blood pressure, heart rate, respiratory rate, and temperature, to detect early signs of complications such as bleeding and infection.Circulation assessment: Monitor pulses, perform Doppler assessments, and check capillary refill, color, temperature, and...
376
01:11Assessing Blood pressure in the Leg
8.9K
Proper measurement of leg blood pressure is a critical skill for healthcare providers, ensuring precise and reliable readings. When performed correctly, this procedure informs patient care and enhances the efficacy of interventions. The following text outlines step-by-step guidelines to measure blood pressure in the leg, providing clarity and ease of understanding for practitioners.
Preparation:
Preparation:
8.9K
01:15Veins of Lower Limbs
2.3K
The human body consists of an intricate network of veins responsible for the crucial task of blood drainage from the lower limbs. These veins can be categorized into two main types: deep veins and superficial veins.
Formed by the union of the medial and lateral plantar veins, the posterior tibial vein, rising through the calf muscle, assimilates the fibular vein. The anterior tibial vein, a superior extension of the foot's dorsalis pedis vein, merges with the posterior tibial vein at the...
Formed by the union of the medial and lateral plantar veins, the posterior tibial vein, rising through the calf muscle, assimilates the fibular vein. The anterior tibial vein, a superior extension of the foot's dorsalis pedis vein, merges with the posterior tibial vein at the...
2.3K
01:19Assessing Blood pressure using a doppler ultrasound
2.4K
To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
2.4K