Obstetrical bleeding

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Obstetrical bleeding
Other namesMaternal bleeding, obstetrical hemorrhage, obstetric haemorrhage, [1] maternal hemorrhage
Specialty Obstetrics
Frequency8.7 million (2015) [2]
Deaths83,000 (2015) [3]

Obstetrical bleeding is bleeding in pregnancy that occurs before, during, or after childbirth. [4] Bleeding before childbirth is that which occurs after 24 weeks of pregnancy. [4] Bleeding may be vaginal or less commonly into the abdominal cavity. Bleeding which occurs before 24 weeks is known as early pregnancy bleeding.

Contents

Causes of bleeding before and during childbirth include cervicitis, placenta previa, placental abruption and uterine rupture. [4] [5] Causes of bleeding after childbirth include poor contraction of the uterus, retained products of conception, and bleeding disorders. [4]

About 8.7 million cases of severe maternal bleeding occurred in 2015 [2] resulting in 83,000 deaths. [3] Between 2003 and 2009, bleeding accounted for 27% of maternal deaths globally. [6]

Later pregnancy

Antepartum bleeding (APH), also prepartum hemorrhage, is bleeding during pregnancy from the 24th week [7] (sometimes defined as from the 20th week [8] [7] ) gestational age up to the birth of the baby. [5] The primary consideration is the presence of a placenta previa which is a low lying placenta at or very near to the internal cervical os. This condition occurs in roughly 4 out of 1000 [9] pregnancies and usually needs to be resolved by delivering the baby via cesarean section. Also a placental abruption (in which there is premature separation of the placenta) can lead to obstetrical hemorrhage, sometimes concealed. This pathology is of important consideration after maternal trauma such as a motor vehicle accident or fall.

Other considerations to include when assessing antepartum bleeding are: sterile vaginal exams that are performed in order to assess dilation of the patient when the 40th week is approaching. As well as cervical insufficiency defined as a midtrimester (14th-26th week) dilation of the cervix which may need medical intervention to assist in keeping the pregnancy sustainable. [10]

During labor

Besides placenta previa and placental abruption, uterine rupture can occur, which is a very serious condition leading to internal or external bleeding. Bleeding from the fetus is rare, but may occur with two conditions called vasa previa and velamentous umbilical cord insertion where the fetal blood vessels lie near the placental insertion site unprotected by Wharton's jelly of the cord. [11] Occasionally this condition can be diagnosed by ultrasound. There are also tests to differentiate maternal blood from fetal blood which can help in determining the source of the bleed.

After delivery

Abnormal bleeding after delivery, or postpartum hemorrhage, is the loss of greater than 500 ml of blood following vaginal delivery, or 1000 ml of blood following cesarean section. Other definitions of excessive postpartum bleeding are hemodynamic instability, drop of hemoglobin of more than 10%, [12] or requiring blood transfusion. In the literature, primary postpartum hemorrhage is defined as uncontrolled bleeding that occurs in the first 24 hours after delivery while secondary hemorrhage occurs between 24 hours and six weeks. [13]

Risk factors

In rare cases, inherited bleeding disorders, like hemophilia, von Willebrand disease (vWD), or factor IX or XI deficiency, may cause severe postpartum hemorrhage, with an increased risk of death particularly in the postpartum period. [13] The risk of postpartum hemorrhage in patients with vWD and carriers of hemophilia has been found to be 18.5% and 22% respectively. This pathology occurs due to the normal physiological drop in maternal clotting factors after delivery which greatly increases the risk of secondary postpartum hemorrhage. [14] Another bleeding risk factor is thrombocytopenia, or decreased platelet levels, which is the most common hematological change associated with pregnancy induced hypertension. If platelet counts drop less than 100,000 per microliter the patient will be at a severe risk for inability to clot during and after delivery. [15]

Medical tests

If a small amount of bleeding is seen in early pregnancy a physician may request:

For bleeding seen in later pregnancy tests may include:

Unrelated bleeding

Pregnant patients may have bleeding from the reproductive tract due to trauma, including sexual trauma, neoplasm, most commonly cervical cancer, and hematologic disorders. Molar pregnancy (also called hydatiform mole) is a type of pregnancy where the sperm and the egg have joined within the uterus, but the result is a cyst resembling a grape-like cluster rather than an embryo. Bleeding can be an early sign of this tumor developing. [17]

See also

Related Research Articles

<span class="mw-page-title-main">Childbirth</span> Expulsion of a fetus from the pregnant mothers uterus

Childbirth, also known as labour, parturition and delivery, is the completion of pregnancy where one or more babies exits the internal environment of the mother via vaginal delivery or caesarean section. In 2019, there were about 140.11 million human births globally. In the developed countries, most deliveries occur in hospitals, while in the developing countries most are home births.

<span class="mw-page-title-main">Placenta praevia</span> Medical condition

Placenta praevia is when the placenta attaches inside the uterus but in a position near or over the cervical opening. Symptoms include vaginal bleeding in the second half of pregnancy. The bleeding is bright red and tends not to be associated with pain. Complications may include placenta accreta, dangerously low blood pressure, or bleeding after delivery. Complications for the baby may include fetal growth restriction.

<span class="mw-page-title-main">Placental abruption</span> Medical condition

Placental abruption is when the placenta separates early from the uterus, in other words separates before childbirth. It occurs most commonly around 25 weeks of pregnancy. Symptoms may include vaginal bleeding, lower abdominal pain, and dangerously low blood pressure. Complications for the mother can include disseminated intravascular coagulopathy and kidney failure. Complications for the baby can include fetal distress, low birthweight, preterm delivery, and stillbirth.

Antepartum bleeding, also known as antepartum haemorrhage (APH) or prepartum hemorrhage, is genital bleeding during pregnancy after the 28th week of pregnancy up to delivery.

Bloody show or show is the passage of a small amount of blood or blood-tinged mucus through the vagina near the end of pregnancy. It is caused by thinning and dilation of the cervix, leading to detachment of the cervical mucus plug that seals the cervix during pregnancy and tearing of small cervical blood vessels, and is one of the signs that labor may be imminent. The bloody show may be expelled from the vagina in pieces or altogether and often appears as a jelly-like piece of mucus stained with blood. Although the bloody show may be alarming at first, it is not a concern of patient health after 37 weeks gestation.

<span class="mw-page-title-main">Uterine rupture</span> Medical condition

Uterine rupture is when the muscular wall of the uterus tears during pregnancy or childbirth. Symptoms, while classically including increased pain, vaginal bleeding, or a change in contractions, are not always present. Disability or death of the mother or baby may result.

<span class="mw-page-title-main">Complications of pregnancy</span> Medical condition

Complications of pregnancy are health problems that are related to, or arise during pregnancy. Complications that occur primarily during childbirth are termed obstetric labor complications, and problems that occur primarily after childbirth are termed puerperal disorders. While some complications improve or are fully resolved after pregnancy, some may lead to lasting effects, morbidity, or in the most severe cases, maternal or fetal mortality.

<span class="mw-page-title-main">Placenta accreta spectrum</span> Medical condition

Placenta accreta occurs when all or part of the placenta attaches abnormally to the myometrium. Three grades of abnormal placental attachment are defined according to the depth of attachment and invasion into the muscular layers of the uterus:

  1. Accreta – chorionic villi attached to the myometrium, rather than being restricted within the decidua basalis.
  2. Increta – chorionic villi invaded into the myometrium.
  3. Percreta – chorionic villi invaded through the perimetrium.
<span class="mw-page-title-main">Uterine atony</span> Loss of tone in the uterine musculature

Uterine atony is the failure of the uterus to contract adequately following delivery. Contraction of the uterine muscles during labor compresses the blood vessels and slows flow, which helps prevent hemorrhage and facilitates coagulation. Therefore, a lack of uterine muscle contraction can lead to an acute hemorrhage, as the vasculature is not being sufficiently compressed. Uterine atony is the most common cause of postpartum hemorrhage, which is an emergency and potential cause of fatality. Across the globe, postpartum hemorrhage is among the top five causes of maternal death. Recognition of the warning signs of uterine atony in the setting of extensive postpartum bleeding should initiate interventions aimed at regaining stable uterine contraction.

<span class="mw-page-title-main">Postpartum bleeding</span> Loss of blood following childbirth

Postpartum bleeding or postpartum hemorrhage (PPH) is often defined as the loss of more than 500 ml or 1,000 ml of blood following childbirth. Some have added the requirement that there also be signs or symptoms of low blood volume for the condition to exist. Signs and symptoms may initially include: an increased heart rate, feeling faint upon standing, and an increased breathing rate. As more blood is lost, the patient may feel cold, blood pressure may drop, and they may become restless or unconscious. In severe cases circulatory collapse, disseminated intravascular coagulation and death can occur. The condition can occur up to twelve weeks following delivery in the secondary form. The most common cause is poor contraction of the uterus following childbirth. Not all of the placenta being delivered, a tear of the uterus, or poor blood clotting are other possible causes. It occurs more commonly in those who already have a low amount of red blood, are Asian, have a larger fetus or more than one fetus, are obese or are older than 40 years of age. It also occurs more commonly following caesarean sections, those in whom medications are used to start labor, those requiring the use of a vacuum or forceps, and those who have an episiotomy.

<span class="mw-page-title-main">Vasa praevia</span> Condition in which fetal blood vessels cross or run near the internal opening of the uterus

Vasa praevia is a condition in which fetal blood vessels cross or run near the internal opening of the uterus. These vessels are at risk of rupture when the supporting membranes rupture, as they are unsupported by the umbilical cord or placental tissue.

<span class="mw-page-title-main">Vaginal delivery</span> Delivery through the vagina

A vaginal delivery is the birth of offspring in mammals through the vagina. It is the most common method of childbirth worldwide. It is considered the preferred method of delivery, as it is correlated with lower morbidity and mortality than caesarean sections (C-sections), though it is not clear whether this is causal.

<span class="mw-page-title-main">Uterine inversion</span> Medical condition

Uterine inversion is when the uterus turns inside out, usually following childbirth. Symptoms include postpartum bleeding, abdominal pain, a mass in the vagina, and low blood pressure. Rarely inversion may occur not in association with pregnancy.

An obstetric labor complication is a difficulty or abnormality that arises during the process of labor or delivery.

A uterotonic, also known as an oxytocic or ecbolic, is a type of medication used to induce contraction or greater tonicity of the uterus. Uterotonics are used both to induce labor and to reduce postpartum hemorrhage.

<span class="mw-page-title-main">Circumvallate placenta</span> Medical condition

Circumvallate placenta is a rare condition affecting about 1-2% of pregnancies, in which the amnion and chorion fetal membranes essentially "double back" on the fetal side around the edges of the placenta. After delivery, a circumvallate placenta has a thick ring of membranes on its fetal surface. Circumvallate placenta is a placental morphological abnormality associated with increased fetal morbidity and mortality due to the restricted availability of nutrients and oxygen to the developing fetus.

<span class="mw-page-title-main">Placental expulsion</span> Ejection of the placenta from the uterus after childbirth

Placental expulsion occurs when the placenta comes out of the birth canal after childbirth. The period from just after the baby is expelled until just after the placenta is expelled is called the third stage of labor.

Early pregnancy bleeding is vaginal bleeding before 14 weeks of gestational age. If the bleeding is significant, hemorrhagic shock may occur. Concern for shock is increased in those who have loss of consciousness, chest pain, shortness of breath, or shoulder pain.

<span class="mw-page-title-main">Emergency childbirth</span>

Emergency childbirth is the precipitous birth of an infant in an unexpected setting. In planned childbirth, mothers choose the location and obstetric team ahead of time. Options range from delivering at home, at a hospital, a medical facility or a birthing center. Sometimes, birth can occur on the way to these facilities, without a healthcare team. The rates of unplanned childbirth are low. If the birth is imminent, emergency measures may be needed. Emergency services can be contacted for help in some countries.

References

  1. ↑ "ICD-11 for Mortality and Morbidity Statistics". World Health Organization. Retrieved 2023-12-05.
  2. 1 2 Vos, Theo; Allen, Christine; Arora, Megha; Barber, Ryan M.; Bhutta, Zulfiqar A.; Brown, Alexandria; Carter, Austin; Casey, Daniel C.; Charlson, Fiona J.; Chen, Alan Z.; Coggeshall, Megan; Cornaby, Leslie; Dandona, Lalit; Dicker, Daniel J.; Dilegge, Tina; Erskine, Holly E.; Ferrari, Alize J.; Fitzmaurice, Christina; Fleming, Tom; Forouzanfar, Mohammad H.; Fullman, Nancy; Gething, Peter W.; Goldberg, Ellen M.; Graetz, Nicholas; Haagsma, Juanita A.; Hay, Simon I.; Johnson, Catherine O.; Kassebaum, Nicholas J.; Kawashima, Toana; et al. (October 2016). "Global, regional, and national incidence, prevalence, and years lived with disability for 310 diseases and injuries, 1990-2015: a systematic analysis for the Global Burden of Disease Study 2015". Lancet. 388 (10053): 1545–1602. doi:10.1016/S0140-6736(16)31678-6. PMC   5055577 . PMID   27733282.
  3. 1 2 Wang, Haidong; Naghavi, Mohsen; Allen, Christine; Barber, Ryan M.; Bhutta, Zulfiqar A.; Carter, Austin; Casey, Daniel C.; Charlson, Fiona J.; Chen, Alan Zian; Coates, Matthew M.; Coggeshall, Megan; Dandona, Lalit; Dicker, Daniel J.; Erskine, Holly E.; Ferrari, Alize J.; Fitzmaurice, Christina; Foreman, Kyle; Forouzanfar, Mohammad H.; Fraser, Maya S.; Fullman, Nancy; Gething, Peter W.; Goldberg, Ellen M.; Graetz, Nicholas; Haagsma, Juanita A.; Hay, Simon I.; Huynh, Chantal; Johnson, Catherine O.; Kassebaum, Nicholas J.; Kinfu, Yohannes; et al. (October 2016). "Global, regional, and national life expectancy, all-cause mortality, and cause-specific mortality for 249 causes of death, 1980-2015: a systematic analysis for the Global Burden of Disease Study 2015". Lancet. 388 (10053): 1459–1544. doi:10.1016/S0140-6736(16)31012-1. PMC   5388903 . PMID   27733281.
  4. 1 2 3 4 Walfish, M.; Neuman, A.; Wlody, D. (December 2009). "Maternal haemorrhage". British Journal of Anaesthesia. 103: i47–i56. doi: 10.1093/bja/aep303 . PMID   20007990.
  5. 1 2 Stables, Dorothy; Rankin, Jean (2010). Physiology in Childbearing: With Anatomy and Related Biosciences. Elsevier Health Sciences. p. 429. ISBN   978-0702044113.
  6. ↑ Say, Lale; Chou, Doris; Gemmill, Alison; Tunçalp, Özge; Moller, Ann-Beth; Daniels, Jane; Gülmezoglu, A Metin; Temmerman, Marleen; Alkema, Leontine (2014). "Global causes of maternal death: a WHO systematic analysis". The Lancet Global Health. 2 (6): e323–e333. doi: 10.1016/S2214-109X(14)70227-X . hdl: 1854/LU-5796925 . ISSN   2214-109X. PMID   25103301.
  7. 1 2 patient.info » PatientPlus » Antepartum Haemorrhage Last Updated: 5 May 2009
  8. ↑ The Royal Women’s Hospital > antepartum haemorrhage Archived 2010-01-08 at the Wayback Machine Retrieved on Jan 13, 2009
  9. ↑ Soyama H, Miyamoto M, Ishibashi H, Takano M, Sasa H, Furuya K (2016). "Relation between Birth Weight and Intraoperative Hemorrhage during Cesarean Section in Pregnancy with Placenta Previa". PLOS ONE. 11 (11): e0167332. Bibcode:2016PLoSO..1167332S. doi: 10.1371/journal.pone.0167332 . PMC   5130260 . PMID   27902772.
  10. ↑ Berghella, MD, Vincenzo (July 2017). "Cervical insufficiency". UpToDate.
  11. ↑ Charles J Lockwood, MD, MHCM, Karen Russo-Stieglitz, MD (July 2017). "Velamentous umbilical cord insertion and vasa previa". UpToDate.
  12. ↑ Atukunda EC, Mugyenyi GR, Obua C, Atuhumuza EB, Musinguzi N, Tornes YF, Agaba AG, Siedner MJ (2016). "Measuring Post-Partum Haemorrhage in Low-Resource Settings: The Diagnostic Validity of Weighed Blood Loss versus Quantitative Changes in Hemoglobin". PLOS ONE. 11 (4): e0152408. Bibcode:2016PLoSO..1152408A. doi: 10.1371/journal.pone.0152408 . PMC   4822885 . PMID   27050823.
  13. 1 2 Global burden of maternal haemorrhage in the year 2000 Carmen Dolea1, Carla AbouZahr2, Claudia Stein1 Evidence and Information for Policy (EIP), World Health Organization, Geneva, July 2003
  14. ↑ Kadir RA, Aledort LM (October 2000). "Obstetrical and gynaecological bleeding: a common presenting symptom". Clinical and Laboratory Haematology. 22 (Suppl 1): 12–6, discussion 30–2. doi:10.1046/j.1365-2257.2000.00007.x. PMID   11251653.
  15. ↑ Aldred, Heather E. (1997). Pregnancy and birth sourcebook. health reference series. ISBN   9780780802162.
  16. 1 2 3 4 5 6 Heine PR, Swamy GK (August 2009). "Vaginal bleeding during early pregnancy". Merck Manual.
  17. ↑ Aldred, Heather E. (1997). Pregnancy and birth sourcebook. Omnigraphics. ISBN   9780780802162.
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