Paced breathing causes tonic change rather than phasic modulation of superficial venous diameter.

IF 3.3 4区 医学 Q1 PHYSIOLOGY
Miharu Matsumoto, Nobuko Hashiguchi, Hiromitsu Kobayashi
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Abstract

Background: Respiratory modulation is generally observed in the inferior vena cava (IVC). If similar respiratory modulation exists in peripheral superficial veins, it would be possible to dilate the vein diameter by respiratory control. This may improve the success rate of venipuncture in clinical practices. Hence, the present study aimed to investigate the respiratory modulation in peripheral superficial veins.

Methods: This study included 21 healthy female volunteers (mean age 21.8 ± 0.9 years). Participants performed spontaneous breathing (SB) and paced breathing (PB). B-mode ultrasound imaging was used to continuously monitor the cutaneous veins of the left elbow fossa for 50 s.

Results: Vein diameter demonstrated a clear modulation consistent with paced breathing, and the amplitude of vein diameter modulation was greater at 10 s-PB than at 3 s-PB. Additionally, PB affected the baseline of modulation (mean vein diameter). The baseline exhibited the largest diameter in SB, followed by 3 s-PB and 10 s-PB. The baseline for SB and 10 s-PB demonstrated a statistically significant difference (p = 0.03). Respiratory modulation was confirmed in peripheral superficial veins; however, tonic change in baseline diameter was dominant over phasic modulation. Even when vein diameter was most dilated at 10 s-PB, the diameter at that time was smaller than the mean diameter at SB.

Conclusions: This study demonstrated that the peripheral superficial vein diameter exhibited respiratory modulation, similar to the IVC. Although respiratory modulation of the IVC has been well documented in previous studies, the present findings provide novel evidence of this phenomenon in the peripheral superficial veins. Additionally, this study identified tonic changes in the mean vein diameter, which were more dominant than phasic modulations. Furthermore, the mean vein diameter during SB was greater than the maximum diameter observed during 10 s-PB. These findings suggested that PB for 50 s during venipuncture did not enhance venous access.

有节奏的呼吸引起张力变化,而不是浅静脉直径的相位调节。
背景:呼吸调节通常发生在下腔静脉(IVC)。如果周围浅静脉存在类似的呼吸调节,则可能通过呼吸控制来扩大静脉直径。这可以提高临床静脉穿刺的成功率。因此,本研究旨在探讨周围浅静脉的呼吸调节。方法:本研究纳入21名健康女性志愿者(平均年龄21.8±0.9岁)。参与者进行自发呼吸(SB)和有节奏呼吸(PB)。b超成像连续监测左肘窝皮静脉50 s。结果:静脉内径明显调节,与有节奏呼吸一致,10 s-PB时静脉内径调节幅度大于3 s-PB。此外,PB影响调节基线(平均静脉直径)。基线直径最大的是SB,其次是3 s-PB和10 s-PB。基线SB与10 s-PB差异有统计学意义(p = 0.03)。周围浅静脉确认有呼吸调节;然而,基线直径的主频变化高于相位调制。即使静脉直径在10s - pb时扩张最大,此时的直径也小于s0时的平均直径。结论:本研究表明外周浅静脉直径表现出呼吸调节,类似于下腔静脉。虽然在以前的研究中已经很好地记录了下下腔静脉的呼吸调节,但本研究结果为外周浅静脉的呼吸调节现象提供了新的证据。此外,本研究还发现,平均静脉直径的张力变化比相位调节更占优势。此外,SB期间的平均静脉直径大于10s - pb期间观察到的最大直径。这些结果表明,静脉穿刺时50s的PB并没有促进静脉通路。
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来源期刊
自引率
6.50%
发文量
39
期刊介绍: Journal of Physiological Anthropology (JPA) is an open access, peer-reviewed journal that publishes research on the physiological functions of modern mankind, with an emphasis on the physical and bio-cultural effects on human adaptability to the current environment. The objective of JPA is to evaluate physiological adaptations to modern living environments, and to publish research from different scientific fields concerned with environmental impact on human life. Topic areas include, but are not limited to: environmental physiology bio-cultural environment living environment epigenetic adaptation development and growth age and sex differences nutrition and morphology physical fitness and health Journal of Physiological Anthropology is the official journal of the Japan Society of Physiological Anthropology.
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