Reversed diastolic intrarenal flow in page kidney following renal biopsy.

Page's kidney is a condition that occurs due to external renal compression, usually caused by a subcapsular haematoma, generating a renal compartmental syndrome with parenchymal damage and renal perfusion alteration. Classically associated with renal trauma, Page's kidney can also arise after invasive renal procedures, such as renal biopsies or percutaneous nephrostomies. Clinically, it can trigger hypertension due to activation of the renin-angiotensin system induced by hypoperfusion secondary to renal parenchymal compression and can also present with varying degrees of renal function impairment. Furthermore, severe acute renal failure may be found particularly in patients with solitary kidneys or renal transplants. We present two cases of Page's kidney after renal biopsy and their PoCUS ultrasound findings. We would like to highlight the reversed diastolic flow on Doppler ultrasound in this entity, a pattern we have found in all two cases.

Reversed diastolic flow in a renal transplant due to ureteric obstruction from intraluminal blood clot.

Reversal of arterial diastolic flow is commonly considered a sign of transplant renal vein thrombosis until proven otherwise, with the differential including acute rejection, acute tubular necrosis, and perirenal hematoma. We discuss a case of a patient who presented with decreased urine output on the second postoperative day following living unrelated kidney transplantation. Doppler ultrasound was performed and demonstrated reversal of diastolic flow in the transplant renal artery. Prompt surgical exploration revealed intraluminal blood clot obstructing the ureter. To our knowledge, this is the first reported case of reversed diastolic flow secondary to ureteral obstruction by an intraluminal blood clot.

Persistent reversed end-diastolic flow of the middle cerebral artery: A rare and concerning finding.

Fetal reversed end-diastolic flow of the middle cerebral artery is a rare ultrasound finding associated with pathological fetal conditions. Herein, we report the case of a fetus presenting with reversed end-diastolic flow of the middle cerebral artery caused by extensive intracranial hemorrhage from maternal warfarin therapy. From a literature review, we present the clinical findings, etiologies, and outcomes of cases with fetal reversed end-diastolic flow of the middle cerebral artery.

The impact of fetal middle cerebral artery Doppler on the outcome of congenital hydrocephalus.

OBJECTIVES: The objective of this study is to investigate the impact of abnormal middle cerebral artery (MCA) Doppler on the perinatal mortality in fetuses with congenital hydrocephalus (CH). METHODS: A prospective study of all fetuses with CH who delivered at our hospital over a period of 7 years. Data were obtained from the ultrasound, Labor room and intensive neonatal care unit (NICU) database. The Perinatal mortality rates were evaluated in relation to the following measures, associated congenital anomalies, cortical mantle thickness (CMT), and MCA Doppler abnormalities (absent or reversed diastole). The main outcome measure was perinatal mortality rate in relation to MCA Doppler changes. RESULTS: A total of 85 cases of CH were diagnosed and managed. The birth prevalence of CH was 2.44 per 1000 live births. On one hand, the perinatal mortality rate was higher in those fetuses with non-isolated hydrocephalus, (37.25% (19/51) versus (35.29% (12/34, p = 0.854 and in those cases with CMT <10 mm, 38.78% (19/49) versus 33.33% (12/36) in those with CMT >10 mm, p = 0.607. On the other hand, the perinatal mortality rate was significantly higher in those fetuses with abnormal MCA Doppler, (100% (13/13) versus 25% (18/72), OR = 78.0, 95% CI (5.52-44085124.60), p < 0.001. CONCLUSIONS: Abnormal fetal MCA Doppler (absent or reversed diastole) appears to be a poor prognostic indicator with significantly high perinatal mortality in fetuses with CH.

Improved resistance index in renal allograft with reversed diastolic flow / 中华器官移植杂志

Objective To study the accuracy of improved resistance index (RI) in judging the prognosis in renal allograft with reversed diastolic flow. Methods According to the transplant nephrectomy, patients with reversed diastolic flow in renal allograft were classified into two groups:surgical group (n = 5) and nonsurgical group (n = 19). The differences in improved RI between two groups were compared by using Student's t test. Improved RI was defined as a ratio of peak systolic velocity plus peak diastolic velocity divided by peak systolic velocity. Receiver operating characteristic (ROC) curve was constructed for improved RI to evaluate diagnostic accuracy in judging the prognosis in renal allograft with reversed diastolic flow. Results Improved RI in surgical group ( 1.57 ± 0. 26)was higher than in nonsurgical group (1.22 ± 0. 08) (P＜＜0. 05). Areas under ROC curve for improved RI was 0. 979. An improved RI threshold of 1.31 had 100 % sensitivity, 90 % specificity, 71%positive predictive value, and 100 % negative predictive value for renal allograft with reversed diastolic flow loss as the maximum Youden index was 90 %. Applying this cutoff value to predict the function of renal allograft with reversed diastolic flow recovery, the accuracy was 92 % (maximum) or 83 %(minimum). Conclusion Improved RI can not only serve as a useful noninvasive index to predict renal allograft with reversed diastolic flow loss, but also to predict the function of renal allograft with reversed diastolic flow recovery.

Dynamic observation the change of reversed diastolic flow in renal allografts with ultrasound / 中华泌尿外科杂志

Objective To retrospectively analyze the change of reversed diastolic flow in renal allografts with ultrasound and its association with clinical outcomes.Methods 17 patients with reverse diastolic flow of renal allograft were reviewed. According to the waveform morphology changes of RDF,17 cases of RDF were classified as two types: typeⅠ(total RDF changing type: continuous total RDF or non-total RDF transformed into total RDF,n=6)and type Ⅱ (non-total RDF changing type: continuous non-total RDF or total RDF transformed into non-total RDF or disappeared,n=11).Meanwhile,they were compared with clinical outcome.Results In typeⅠ, transplanted kidney resection were performed in five cases, but 10 cases in type Ⅱ were recovered. TypeⅠwas associated with lower likelihood of renal allografts survival(Fisher exact test, P=0.005).Conclusions Dynamic observation the change of RDF may help to judge the prognosis in renal allograft.TypeⅠmay predict of an unfavorable outcome in renal allograft with RDF.

Clinical significance of Doppler velocimetry and oligohydramnios in intrauterine growth restriction / 대한산부인과학회지

OBJECTIVE: The aim of this study is to prove the clinical significance by evaluating pregnancy outcomes from intrauterine growth restriction using waves of the Doppler velocimetry of uterine and umbilical artery and amniotic fluid index. METHODS: Throughout the period of January 2000 to May 2005 at our hospital, we reviewed 127 cases diagnosed with intrauterine growth restriction after 24 weeks of pregnancy and the existences of diastolic notch of uterine artery (DNUT), absent or reversed end-diastolic velocity of umbilical artery (AEDV) and oligohydramnios were considered abnormal. We set the group that had no abnormal signs as the control group (62 cases), and respectively compared the groups that had oligohydramnios (24 cases), unilateral DNUT (27 cases), bilateral DNUT (10 cases) and AEDV (13 cases) with the control group. And we compared the groups that had only one abnormal sign, that is oligohydramnios (20 cases), bilateral DNUT (7 cases), AEDV (7 cases) and the group showing 2 or more complicated abnormal signs those above (9 cases) with the control group. RESULTS: Perinatal outcomes such as preterm birth, low birth weight, lower 5-min Apgar score (A/S), neonatal acidosis, admission rate of neonatal intensive care unit (NICU) and perinatal mortality were poor statistically in groups with DNUT, AEDV and oligohydramnios compared to those which have none of these abnormal signs. And those with DNUT had worse results when affected on both sides. And those with AEDV showed worse perinatal outcomes compared to those with bilateral DNUT or oligohydramnios; any overlapping of these abnormal signs indicated worse perinatal outcomes, which had statistic significance. CONCLUSION: Close observation of the fetal well-being by analysis on the wave velocimetry of the blood flow such as the uterine arteries and umbilical arteries and the measurement of the amniotic fluid volume enables predicting the perinatal prognosis of the intrauterine-growth restricted fetuses which may contribute in reducing the perinatal morbidity and mortality.