INTRODUCTION

Umbilical cord milking (UCM) refers to the transfer of blood to the infant from the time of birth to the time of umbilical cord clamping by gently grasping the umbilical cord and squeezing the cord from the placenta several times toward the infant[1]. This cord management is considered to enhance placentalto-fetal transfusion and could be a suitable alternative placental transfusion method for delayed cord clamping if a newborn infant requires resuscitation in the delivery room to avoid delayed resuscitation[2]. Some clinical trials and meta-analyses have suggested benefits of UCM

immediate cord clamping without apparent complications[3]. It has been adopted at some tertiary neonatal centers, especially for late preterm or term infants, to increase iron levels and prevent the development of iron deficiency anemia, which is associated with impaired motor development, behavioral problems, and cognitive delays[4]. However, concerns remain about whether UCM increases the incidence of intracranial hemorrhage in preterm infants[5]. Its use has been recommended to be avoided in babies less than 28 wk gestational age because it is associated with severe brain hemorrhage[6]. However, few reports have shown late preterm infants presenting with neonatal hemorrhage stroke (NHS) and severe coagulopathy after receiving UCM.

We report a case of a preterm infant born at 34 wk of gestation. After receiving UCM after birth, she developed NHS 11 h after birth, and a subsequent blood test showed severe coagulopathy. The preterm infant developed umbilical cord bleeding, gastric bleeding, and disseminated intravascular coagulation (DIC) on day 1 of life, and pulmonary hemorrhage and seizures on day 3 of life. A bolus of midazolam and phenobarbital sodium were used to control seizures, and fresh frozen plasma (FFP), red blood cell and platelet transfusions were provided to correct coagulopathy, thrombocytopenia and anemia.

CASE PRESENTATION

Chief complaints

A female premature infant born at 34 wk of gestation with a very low birth weight was sent to the neonatal intensive care unit (NICU) after receiving UCM.

History of present illness

A preterm newborn at 34 wk gestation was delivered

cesarean section to a 38-year-old mother due to a premature rupture of the membrane and absence of blood flow in the umbilical artery diastolic period. After birth, the obstetrics doctor milked the cord by squeezing it toward the infant for 2 s and repeated the same action 3 times before clamping and cutting the cord. After hospitalization, the baby was found to have hypoglycemia and mild metabolic acidosis. The baby was administered a glucose infusion for hypoglycemia and sodium bicarbonate for metabolic acidosis. Intramuscular vitamin K1 was administered for 3 d to prevent vitamin K deficiency coagulopathy. Eleven hours after birth, the baby developed apnea with decreased peripheral oxygen saturation levels. The baby was diagnosed with respiratory distress syndrome. Thus, the baby started nasal continuous positive airway pressure (nCPAP). Fourteen hours after birth, the baby was noticed to be bleeding at the umbilical cord site and the location where the blood was drawn. As blood was found in the gastric tube, FFP was given for coagulopathy, and an omeprazole and prothrombin complex concentrate was administered for gastric bleeding. On day 3 of life, an increased inspired oxygen concentration was needed, and blood was found in the endotracheal tube. The baby presented with repetitive, rhythmic movements of the limbs; thus, pulmonary hemorrhage and seizure were considered. The baby was started on mechanical ventilation with synchronized intermittent mandatory ventilation to achieve adequate oxygenation. An epinephrine and prothrombin complex concentrate was flushed into the trachea, and FFP (20 mL/kg × 3), red blood cell (20 mL/kg × 2) and platelet (30 mL/kg) transfusions were administered for coagulopathy and anemia.

A subsequent cranial computed tomography (CT) scan showed a left parenchymal brain hemorrhage with extension into the ventricular and subarachnoid spaces. Brain edema was massive (Figure 1). The blood test showed thrombocytopenia, prolonged PT, prolonged APTT, low fibrinogen, raised DD levels and anemia, confirming the diagnosis of DIC.

（1）交流輸入，無備電：采取就近接入市電的直接供電方式。這種方式最簡單，適合對網(wǎng)絡(luò)質(zhì)量要求不高，同時信號源為交流輸入的場景。

History of past illness

The patient had no past illness history.

Personal and family history

又比如 美國餐廳 Joselito Casade Comidas，它將菜品分成小吃、半餐，全餐，三種層級，當(dāng)然不同的層級對應(yīng)不同的費用。

我們都知道，古典詩詞講究的是凝練，往往就是通過精練的語言，表達(dá)作者深厚的情感。在這里，電子白板的標(biāo)記功能又能凸顯它的作用了。我們可以重點將詩詞中出現(xiàn)的字眼勾畫出來，讓學(xué)生各抒己見，仔細(xì)探討這個字所表達(dá)的含義，從而挖掘作者的情感。

Physical examination

On the baby’s admission to the NICU, a physical examination revealed a temperature of 36.1 °C, a heart rate of 164 bpm, a blood pressure of 51/35 (41) mmHg, and a respiratory rate of 48 breaths/min. Her baseline oxygen saturation was maintained at approximately 85%. She was found to have bilateral conjunctival hemorrhage.

On admission to the NICU, the baby received a glucose infusion for hypoglycemia and sodium bicarbonate for metabolic acidosis after hospitalization. Intramuscular vitamin K1 was administered for 3 d to prevent vitamin K deficiency coagulopathy. Eleven hours after birth, the baby developed apnea with a decreased peripheral oxygen saturation level, while bleeding was noticed at the baby’s umbilical cord site and the location where the blood was drawn. Blood was also found in the gastric tube. The baby received nCPAP, and FFP (20 mL/kg) was given for coagulopathy. On day 3 of life, blood was found in the endotracheal tube, and the baby presented with repetitive, rhythmic movements of the limbs. A chest radiograph demonstrated bilateral alveolar infiltrates; thus, pulmonary hemorrhage and seizures were considered. A change was made to high-frequency ventilation with an epinephrine and prothrombin complex concentrate flushed in the trachea and FFP (20 mL/kg × 2), red blood cell (20 mL/kg × 2) and platelet (30 mL/kg) transfusions for coagulopathy and anemia. A bolus of midazolam for 3 d, intravenous calcium for 11 d and phenobarbital sodium for 5 d was administered to control the seizures.

Laboratory examinations

Table 1 shows the laboratory findings for the first three days of life. After hospitalization, a quick bedside blood glucose reading revealed a level of 2.4 mmol/L; a blood gas test revealed a pH level of 7.13, a PCO2 Level of 22.5 mmHg, an ABE of 20.6 mmol/L, and a lactate level of 13.4 mmol/L; and a blood test showed a high hemoglobin level of 207 g/L, a platelet level of 119 × 10

/L and a C-reactive protein level of 11 mg/L (normal 0-8 mg/L). The coagulation study results were as follows: A prothrombin time (PT) of 36.2 s (normal 10-14), an international normalized ratio (INR) of 3.18 s (normal 0.8-1.4), an activated partial thromboplastin time (APTT) of 70.8 s (normal 24-40), a thrombin time of 29.6 s (normal 14-21), a fibrinogen level of 0.52 g/L (normal 2-4), a D-dimer (DD) level of 4040 μg/L (0-500), and a calcium level of 1.36 mmol/L (2-2.6). A blood test showed a decreased platelet level from 47 × 10

/L on day 2 of life to 26 × 10

/L on day 3 of life (Table 1). A blood test also showed rapidly decreased hemoglobin levels to 113 g/L and platelet levels from 62 × 10

/L on day 4 of life to 15 × 10

/L on day 5 of life; the blood calcium level was 1.37 mmol/L (2-2.6). On Day 9 of life, there was an improvement in pulmonary hemorrhage and an increase in the platelet level to 41 × 10

/L.

Imaging examinations

A chest X-ray revealed a diffuse ground glass appearance. A cranial ultrasound showed high density in the left frontal and parietal lobes.

FINAL DIAGNOSIS

綜上所述，DPN患者使用胰激肽原酶聯(lián)合木丹顆粒與甲鉆胺治療，療效較好，臨床應(yīng)用方便，不良反應(yīng)較輕，值得臨床醫(yī)療實踐中推廣應(yīng)用。

TREATMENT

混凝土初步凝結(jié)的過程中，會產(chǎn)生干縮和自縮的現(xiàn)象，其內(nèi)部及表面的水分會快速揮發(fā)。因此，建設(shè)單位要進(jìn)行養(yǎng)護(hù)以保證混凝土的充分凝結(jié)?；炷恋酿B(yǎng)護(hù)主要分三個階段：①早期養(yǎng)護(hù)；②養(yǎng)護(hù)過程中的溫濕度控制；③成型之后的常規(guī)養(yǎng)護(hù)。在混凝土的養(yǎng)護(hù)階段，建設(shè)單位要避免環(huán)境對混凝土的影響。在適當(dāng)?shù)臅r間拆除混凝土的外側(cè)膜之后，進(jìn)行全濕養(yǎng)護(hù)。要使用塑料薄膜對混凝土施工區(qū)域進(jìn)行覆蓋，時間控制在14d以上。全濕養(yǎng)護(hù)結(jié)束之后，開始進(jìn)行長達(dá)兩旬的常規(guī)養(yǎng)護(hù)。如果外界溫度偏高或偏低，可適量增減全濕養(yǎng)護(hù)的時間。

OUTCOME AND FOLLOW-UP

On day 5 of life, the seizures finally disappeared with resolution of the gastric bleeding. On day 9 of life, with improvement of the clinical condition, the baby was changed to nasal oxygen and started enteral feeding. The antinuclear antibody test was all negative. Later hospitalization was unremarkable. No paroxysmal discharge or asymmetrical attenuation was found on the electroencephalogram on day 40 of life. Magnetic resonance imaging (MRI) was performed on day 25 of life and showed improvement of the left parenchymal brain hemorrhage and subarachnoid hemorrhage (Figure 2). We did not perform angiography by CT or MRI to exclude underlying vascular abnormalities because angiography was not available in our hospital. The baby was hospitalized for 46 d and recovered well without seizure recurrence. The patient was followed up at 8 months old with correction of gestational age, and her neurodevelopment progressed according to her age.

DISCUSSION

Placental transfusions have become standard procedures in neonatal care. UCM provides a placental transfusion by pushing blood with a duration similar to immediate umbilical cord clamping, allowing prompt resuscitation of an infant[1,2]. It is an alternative placental transfusion method for delayed umbilical cord clamping in obstetric practice[7]. Three or four repetitions of milking the intact cord deliver approximately 14 mL/kg of blood[8]. A previous meta-analysis of UCM showed benefits and no adverse effects in the immediate postnatal period in infants with a gestational age of less than 33 wk. Higher hemoglobin levels and hematocrit and a reduced risk for intraventricular hemorrhage of all grades were identified in the UCM group[9]. However, a multicenter noninferiority randomized clinical trial of preterm infants (born at 23-31 wk gestation) showed that severe intracerebral hemorrhage was significantly higher in the UCM group than in the delayed umbilical cord clamping group (8%

3%). For infants within 23 to 27 wk gestation, compared with 6% of infants who received delayed cord clamping, the incidence rate of severe brain bleeding was 22% in the UCM group[10]. Thus, the benefit and safety of UCM remain uncertain in preterm infants, especially in infants less than 28 wk gestational age. It is recommended that cord milking be avoided in babies less than 28 wk gestational age[6]. For late preterm or term infants who do not require resuscitation, cord management is recommended to increase iron levels and prevent the development of iron deficiency anemia. Concerns remain about whether UCM increases the incidence of intraventricular hemorrhage in late preterm or term infants. However, few reports have shown that late preterm infants can develop NHS and severe coagulopathy after receiving UCM.

NHS is diagnosed in a neonate with a focal accumulation of blood within the brain parenchyma confirmed by autopsy or imaging. It usually occurs in term infants presenting with encephalopathy, seizures, and/or neurologic deficits in the first 28 d of life[11]. Evidence suggests that neonatal hemorrhagic stroke affects approximately 1 in 6300 Live births. Maternal etiologies have been implicated in NHS, including infection, anticoagulant use or coagulopathy, medication side effects, substance misuse, seizure disorders, trauma, cholestasis and febrile illness[12]. Definitive causes of NHS include structural lesions and bleeding diatheses. However, such definitive causes account for few cases, and the mechanisms of idiopathic NHS are not well understood. A population-based case–control study found associations with intrapartum variables such as difficult fetal transition and being small for gestational age[13]. There are biologically plausible explanations for the adverse effects of UCM in preterm infants related to the fragile germinal matrix[14]. Premature infants lack adequate cerebral autoregulation compared with mature infants[15]. Fetal growth restriction preterm infants more frequently display impaired autoregulation compared with appropriate for gestational age on days 2 and 3 of life, which may predispose them to brain injuries[16]. Furthermore, changes in systemic blood flow with repeat UCM may be transferred to cerebral blood flow, causing rupture[17]. A study in anesthetized 128-d-old preterm lambs (equivalent to a human at 26 wk gestation) demonstrated that UCM caused large fluctuations in mean carotid artery pressures and blood flows[18]. In our case, the infant was small for her gestational age, and our previous ultrasound examination did not find intrauterine intracranial hemorrhage. After receiving UCM, she developed left parenchymal brain hemorrhage with extension into the ventricular and subarachnoid spaces. We assumed that the fluctuation in blood flow with repeat UCM may cause rupture, especially for late preterm infants who are small for gestational age.

The most common causes of coagulation activation are severe sepsis or shock due to circulatory collapse or extensive tissue damage from trauma[19,20]. However, bleeding disorders such as inherited coagulopathy and vitamin K deficiency can also lead to coagulopathy[21]. Preterm infants are of particular concern for bleeding because of immature hepatic and hemostatic function, and they are thought to have lower serum levels of vitamin K-dependent clotting factors, including factors II, VII, IX, and X[22]. The current practice is to routinely administer intramuscular vitamin K1 shortly after birth to all infants to prevent hemorrhagic diseases in newborns. Therefore, infants are less likely to develop early vitamin K deficiency bleeding. This research hypothesized that the infant had consumptive coagulopathy owing to extensive tissue damage from trauma. The UCM procedure may change systemic blood flow and cause rupture of fragile brain vessels. Blood loss then produces profound hypovolemic instability, DIC, and unresponsive metabolic acidosis. Thus, it is important to enhance the implementation of the procedures associated with clinical UCM guideline availability, knowledge of UCM benefits and strict cooperation within the delivery team. When UCM is performed for late preterm infants, especially those who are small for their gestational age or have a difficult fetal transition, neonatal health care professionals need to assess the occurrence of intracranial hemorrhage within the first three days of life because it can affect infants with higher hemodynamic and respiratory instabilities[7]. It is important to recognize the complications. Supportive management, such as intensive care and blood transfusion, may be indicated in light of seizures and coagulopathy.

CONCLUSION

Our case suggested that for late preterm infants who are small for gestational age and who receive UCM for alternative placental transfusion, neonatal health care professionals should be cautious in assessing the development of NHS and severe coagulopathy. Immediate recognition of NHS development by ultrasound and cranial CT scans plays a vital role in the recommendations of neonatal neurointensive care and seizure monitoring. A complete blood count with platelet count and coagulation evaluations in addition to imaging are important in intensive care management. Immediate FFP and blood transfusion are recommended when the development of coagulopathy and associated DIC are suspected. This case study strongly recommends that neonatal health care professionals be more cautious in assessing late preterm infants who are small for gestational age and receive UCM.

FOOTNOTES

Lu Y collected the medical records of the patient and drafted the manuscript; Zhi-Qun Zhang reviewed the literature and was responsible for the intellectual content of the manuscript; all authors issued final approval for the version to be submitted.

Zhejiang Province Medical Science and Technology Foundation of China, No. 2021PY057.

受水區(qū)中部平原和濱海平原地區(qū)咸水、微咸水資源分布廣，資源豐富，可采資源量為22.23億m3/a。據(jù)國土資源部門調(diào)查，2003年3~5 g/L半咸水開采量為2.30億m3，大于5 g/L的咸水開采量為0.67億m3，還有很大的利用空間。位于東部濱海海水入侵區(qū)的天津、河北和山東，有漫長的海岸線，這些地區(qū)應(yīng)充分利用海水。

The patient's legal guardian provided informed written consent prior to study enrollment.

The authors have read the CARE Checklist (2016), and the manuscript was prepared and revised according to the CARE Checklist (2016).

All authors declare that they have no conflicts of interest to disclose.

The baby weighed 1270 g, was described as vigorous, and cried at birth, with Apgar scores of 9 and 10 at one minute and five minutes of life, respectively. The mother did not take precautions or receive checks regularly during pregnancy. She was diagnosed with preeclampsia with high blood pressure without a history of hypertension on admission. An intrauterine fetal ultrasound revealed fetal distress and fetal growth restriction.

This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BYNC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is noncommercial. See: https://creativecommons.org/Licenses/by-nc/4.0/

China

Yan Lu 0000-0002-6402-8788; Zhi-Qun Zhang 0000-0002-9068-9715.

壩頂高程141.60m，建基面高程114.1m，壩高27.5m。壩頂寬度為5.0m，與左右岸公路相同，采用混凝土路面。

Xing YX

實操能力方面:具備較強(qiáng)的分析產(chǎn)品價值的能力，能充分理解理財產(chǎn)品和工具。能夠針對客戶的具體情況制定理財規(guī)劃，理財師所要求的基本知識和業(yè)務(wù)技能掌握良好，能夠獨立開展銀行、保險、證券、信托及理財?shù)臉I(yè)務(wù)。

A

Xing YX

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