Ultrasound blood flow characteristics changes in fetal umbilical artery thrombosis: A retrospective analysis

Table 1 The umbilical artery blood flow ultrasonic indices of the described case

Diagnosis gestational weeks	S/D	RI	PI	PSV (cm/s)
24+1	3.70 (50th-75th)	0.73 (50th-75th)	1.20 (50th-75th)	37.9
30+4	2.30 (10th-25th)	0.57 (10th-25th)	0.93 (25th-50th)	38.7
30+6	1.82 (2.5th)	0.45 (2.5th)	0.62 (2.5th)	59.1

S/D: Systolic-diastolic duration ratio; RI: Resistance index; PI: Pulsatility index; PSV: Peak systolic velocity.

Table 2 Maternal clinical data and neonatal outcomes of patients with umbilical artery thrombosis

No.	Age (yr)	Gravidity (times)	Parity (times)	Diagnosis gestational weeks	Delivery gestational weeks	Apgar score	Umbilical cord abnormalities	Birth weight (g)
1	32	2	0	30+6	-	-	-	-
2	28	3	2	30+6	31+2	6-8-8	Torsion for 48 cycles	1380
3	28	1	1	36+3	37+1	10-10-10	Torsion for 44 cycles	2330
4	27	1	1	33+6	33+6	9-9-9	Torsion for 30 cycles	2315
5	28	2	1	31+5	32	8-9-9	Torsion for 45 cycles	1300
6	35	2	2	34+4	34+4	9-9-9	Torsion for 45 cycles	2442
7	24	1	1	35+2	35+3	10-10-10	Torsion for 40 cycles	2220
8	25	1	1	32	36+3	10-10-10	Torsion for 38 cycles	2475
9	31	2	2	37+2	37+2	1-7-7	Torsion for 41 cycles	3480
10	31	1	1	29+3	32+3	8-9-9	Torsion for 38 cycles	1690
11	31	2	1	36+6	37+1	9-10-10	Torsion for 35 cycles	2915
12	30	2	1	36	36	10-10-10	Torsion for 30 cycles	3023
13	27	1	1	39+1	39+1	9-9-10	Pseudoknot	3000
14	35	4	2	37+4	37+4	10-10-10	-	2477
15	35	3	2	39+5	39+5	10-10-10	-	3468
16	25	1	1	34+3	34+3	9-9-9	Torsion for 45 cycles	1830
17	35	3	2	31	31	9-9-9	Torsion for 41 cycles	1715
18	32	1	1	28+4	37	10-10-10	Torsion for 55 cycles	2590
19	36	3	2	37+2	37+3	8-10-10	Narrow, torsion for 30 cycles with tight spirals	3055