P081: Color Doppler analysis of renal arterial hemodynamics in fetuses with renal disease-confirmation of blood flow changes specific to the renal artery and its diagnostic significance

2003 ◽  
Vol 22 (S1) ◽  
pp. 93-93
Author(s):  
C. Sasakura ◽  
T. Iura ◽  
Y. Watanabe ◽  
H. Tomizawa ◽  
S. M. Makinoda
Keyword(s):  
Blood Flow ◽  
Renal Disease ◽  
Renal Artery ◽  
Color Doppler ◽  
Diagnostic Significance ◽  
Arterial Hemodynamics ◽  
Flow Changes ◽  
Doppler Analysis

A Color Doppler Analysis of Nifedipine-Induced Posterior Ocular Blood Flow Changes in Open-Angle Glaucoma

1997 ◽  
Vol 6 (4) ◽  
pp. 231???236 ◽  
Author(s):  
Richard P. Wilson ◽  
Warren J. Chang ◽  
Robert C. Sergott ◽  
Marlene R. Moster ◽  
Courtland M. Schmidt ◽  
...  
Keyword(s):  
Blood Flow ◽  
Open Angle Glaucoma ◽  
Color Doppler ◽  
Ocular Blood Flow ◽  
Open Angle ◽  
Flow Changes ◽  
Doppler Analysis

313 EVALUATION OF COLOR DOPPLER ULTRASONOGRAPHY OF THE PERIFOLLICULAR BLOOD FLOW TO PREDICT THE DEVELOPMENTAL COMPETENCE OF BOVINE CUMULUS - OOCYTE COMPLEXES COLLECTED DURING REPEATED OVUM PICK-UP SESSIONS

2008 ◽  
Vol 20 (1) ◽  
pp. 236
Author(s):  
A. Hanstedt ◽  
K. Höffmann ◽  
Ä. Honnens ◽  
H. Bollwein ◽  
C. Wrenzycki
Keyword(s):  
Blood Flow ◽  
Color Doppler ◽  
Developmental Competence ◽  
Dominant Follicle ◽  
In Vitro Production ◽  
Small Individual ◽  
Color Flow ◽  
Color Flow Imaging ◽  
Follicle Size ◽  
Flow Changes

The population of cumulus–oocyte complexes (COCs) used in OPU–IVP (ovum pick-up combined with in vitro production of embryos) is largely homogeneous due to repeated sessions resulting in the elimination of dominant and atretic follicles, especially when a 3–4 day interval is used. However, on average only 20% of the COCs develop to the blastocyst stage (Merton et al. 2003 Theriogenology 59, 651–674). Different blood flow changes within the follicle wall influence the fate of the follicles, and detectable blood flow and vasculature are associated with follicle viability. Furthermore, blood flow in follicles may be involved in not only selection of the dominant follicle but also early follicular development including follicular recruitment (Miyamoto et al. 2006 J. Reprod. Dev. 52, 153–160). However, no data are available regarding the quality of the COCs collected from follicles with or without blood flow. The purpose of this study was to determine whether qualitative perifollicular blood flow changes can be used to predict the developmental competence of COCs collected during repeated OPU sessions. Lactating Holstein cows were used as oocyte donors. After dominant follicle removal, OPU was performed twice weekly employing a 7.5-MHz transducer (GE 8C-RS) of an ultrasound scanner (GE Logiq Book). Follicle size and Doppler characteristics (color flow imaging) were recorded by transvaginal ultrasonography just before COC collection. Due to technical limitations for measurement of blood flow in small individual follicles, only the presence or absence of blood flow was assessed for each follicle. When a clearly visible blue or red spot (blood flow) was detected in the follicle wall, it was considered as a follicle with detectable blood flow. Follicles with or without detectable blood flow from each individual cow were aspirated separately. After morphological classification of COCs, standard protocols for IVP were used for embryo production. Cleavage and blastocyst rates were recorded at Day 3 and Day 8, respectively. In total, 464 (246 with and 218 without detectable blood flow) follicles e3 mm were aspirated. The percentage of follicles with detectable blood flow increased depending on follicle size (3 mm: 28.7, 4 mm: 48.4, 5 mm: 50.5, 6 mm: 62.5, 7 mm: 64.8, 8 mm: 71.4, and 9 mm: 76.9). Cleavage rates for COCs stemming from follicles with or without detectable blood flow did not show differences, 45.5% (35/77) and 56.7% (38/67), respectively. The rates of blastocyst formation were also similar in COCs originating from follicles with and without detectable blood flow, 16.9% (13/77) and 14.9% (10/67), respectively. These results show that perifollicular blood flow increases during early follicular growth. Within the detection limits of this study, differences in perifollicular blood flow during repeated OPU sessions twice weekly did not seem to be predictive of oocyte competence. We acknowledge the Ruthe Research Farm, Germany, for providing the animals, and Masterrind GmbH, Germany, for donating the semen.

scholarly journals Blood Flow Changes in Forearm Arteries After Ultrasound-guided Costoclavicular Brachial Plexus Blocks: a Prospective Observational Study

2020 ◽  
Author(s):  
Yang Xu ◽  
Derong Cui ◽  
Junfeng Zhang ◽  
Qian Ding ◽  
Jing Dong ◽  
...  
Keyword(s):  
Blood Flow ◽  
Brachial Plexus ◽  
Flow Rate ◽  
Color Doppler ◽  
Resistance Index ◽  
Peak Systolic Velocity ◽  
Volumetric Flow Rate ◽  
Ultrasound Guided ◽  
Significant Difference ◽  
Flow Changes

Abstract BackgroundAs a new approach, an infraclavicular brachial plexus block (BPB) at the costoclavicular space (CCS) has been shown to be effective in achieving a sensory and motor blockade in the forearm. However, no studies have assessed blood flow changes in the forearm arteries after a costoclavicular BPB. The purpose of the present study was to assess blood flow changes in the distal radial artery (RA) and ulnar artery (UA) after a costoclavicular BPB using color Doppler ultrasound.MethodsThirty patients who underwent amputated finger replantation and received an ultrasound-guided costoclavicular BPB were included in the study. The hemodynamic parameters of the RA and UA were recorded before the block and 10 min, 20 min, and 30 min after the block using color Doppler ultrasound to determine the peak systolic velocity (PSV), end-diastolic velocity (EDV), mean velocity (Vmean), pulsatility index (PI), resistance index (RI) and area. The volumetric flow rate (VFR) was calculated using the formula Q=area×Vmean. The aforementioned parameters were compared not only before and after the BPB but also between the RA and UA.ResultsThere was a significant increase in the PSV, EDV, Vmean, area, and VFR and a significant decrease in the PI and RI of the RA and UA 10 min, 20 min, and 30 min postblock compared with the respective baselines. The increase of 30 min postblock in EDV (258.68% in the RA, 279.63% in the UA) was the most notable, followed by that in the Vmean (183.36% in the RA, 235.24% in the UA), and the PSV (139.11% in the RA, 153.15% in the UA) changed minimally. The Vmean and VFR of the RA were significantly greater than those of the UA before the BPB, howerver, there was no significant difference in VFR between RA and UA after the BPB.ConclusionsA costoclavicular BPB can increase blood flow in the forearm arteries. The RA had a higher volumetric flow rate than the UA before the BPB; however, the potential blood supply capacity of the UA is similar to that of the RA after a BPB.Trial registrationThis study was registered in Chictr.org.cn registry system on 12 June 2019 (ChiCTR1900023796).

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