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PubMed1997

Fetal medicine.

Fetal medicine is the practice of medicine where the patient is the fetus. The traditional activities of clinical medicine: prevention, screening, diagnosis, and therapy are directed at decreasing, identifying and treating fetal disease. Examples of successful preventative, screening, diagnostic and therapeutic maneuvers involving the fetus are presented. A plea is made for the systematic evaluation of the new technology being developed in fetal medicine. The same standard of evidence-the randomized, controlled clinical trial-which is more and more applied to traditional medical practice-should also be the gold standard for fetal medicine.

Female↗
PubMed1963

Foetal anoxia.

Explore the source record for details and available documents.

Female↗
PubMedDate not supplied

Fetal tachycardia: intrauterine and postnatal course.

Eighteen consecutive cases of fetal tachycardia referred to the department of Pediatric Cardiology, Uppsala University, were studied retrospectively. All cases were detected at a routine visit at an antenatal clinic. None of the cases had a structural heart disease. Fetal supraventricular tachycardia was found in 8 cases and atrial flutter in 10 cases. In 7 cases, hydrops and heart failure were diagnosed. Antenatal treatment with digoxin, alone or in combination with other antiarrhythmic drugs, was needed in 15 cases. In 10 cases an obvious effect of the therapy was observed. No intrauterine deaths occurred. One infant died postnatally. At birth, 4 infants were in need of neonatal intensive care when delivered. Antiarrhythmic treatment was started in 13 cases postnatally. Late relapse of tachycardia was reported in 3 children. In 1 of these cases the prenatal tachycardia had resolved spontaneously and the infant was not treated antenatally nor during the neonatal period. Although fetal tachycardia is a serious condition, antenatal treatment in combination with careful monitoring and induction of delivery in cases with deteriorating fetal condition result in a satisfactory outcome for the majority of infants. However, there is a risk of late recurrence.

Adult↗
PubMed1991

[Prenatal diagnosis from fetal blood].

Fetal blood sampling under ultrasound guidance allows prenatal diagnosis of hemoglobin and coagulation disorders but also infectious fetal diseases (i.e. toxoplasmosis, rubella, cytomegalovirus). In utero, therapeutic possibilities have considerably reduced the number of therapeutic abortions.

Blood Coagulation Disorders↗
PubMed1992

Prenatal diagnosis of intrauterine infection with parvovirus B19 by the polymerase chain reaction technique.

Human parvovirus B19 is a recently recognized cause of fetal hydrops and death. Efforts to characterize the natural history of fetal infection with this virus have been hampered by the lack of sensitive and specific tests for diagnosis in utero. Using the highly sensitive polymerase chain reaction (PCR) assay, we determined the fetal infection status in 56 pregnancies by testing amniotic fluid, fetal serum, and maternal serum for B19 DNA and antibodies. Factors associated with a high risk of B19 infection were fetal disease, exposure to persons with erythema infectiosum, or signs or symptoms of acute B19 infection. Fifteen women (27%) were B19 IgM-positive, a status suggesting recent infection; the positivity of all of the corresponding fetal specimens for B19 DNA in the PCR was indicative of fetal infection. In four of these cases, serial ultrasonographic examinations documented spontaneous resolution of fetal hydrops. Twenty-four women (43%) were IgG-positive and IgM-negative; this pattern suggested prior infection. The PCR gave positive results, consistent with recent maternal infection, in four of these cases. Seventeen women (30%) were IgG-negative and IgM-negative, a pattern suggesting no prior infection; the PCR results in four cases were indicative of a possible early maternal infection or a possible atypical immune response. The PCR is a sensitive and rapid method for the diagnosis of intrauterine infection with human parvovirus B19 and promises to facilitate studies of the natural history and treatment of this infection.

Adolescent↗
PubMed1992

Fetal abdominal echogenic mass: an early sign of intrauterine cytomegalovirus infection.

BACKGROUND: Recent advances in ultrasound technology have made it possible to diagnose fetal diseases much earlier in pregnancy. Reports have indicated that intrauterine infections, specifically cytomegalovirus, can be diagnosed prenatally by ultrasound. CASE: We encountered two cases in which cytomegalovirus infection was associated with hyperechoic areas in the fetal abdomen. CONCLUSION: Hyperechoic areas in the fetal abdomen may be an early sign of fetal cytomegalovirus infection. Persistence of this sign may indicate a mild form of infection. Disappearance of these hyperechoic areas in subsequent ultrasonographic examinations and development of other ultrasound signs may indicate severe infection and poor prognosis.

Adult↗
PubMed1991

Maternal outcome after open fetal surgery. A review of the first 17 human cases.

A few fetal diseases may benefit from surgical treatment before birth, but hysterotomy and subsequent delivery by cesarean section pose a risk to the otherwise unaffected mother. To assess maternal risk of mortality, morbidity, and reproductive potential after fetal surgery, we reviewed our experience with 17 highly selected women who underwent fetal surgery. Fifteen of these procedures were performed for one of two congenital anomalies: severe bilateral hydronephrosis and congenital diaphragmatic hernia. There were no deaths or serious maternal injuries. In the 14 women who continued pregnancy after hysterotomy, uterine irritability and preterm labor were frequent complications, requiring early confinement in most cases. There has been no detectable effect on future fertility, as indicated by eight subsequent normal pregnancies. We conclude that hysterotomy for fetal surgery can be accomplished without unduly endangering the mother's life or her future reproductive potential. However, morbidity related to premature labor remains a serious problem, and our ability to control uterine contractions after hysterotomy remains the limiting factor in human fetal surgery.

Adolescent↗
PubMed2002

The fetal origins hypothesis: placental insufficiency and inheritance versus maternal malnutrition in well-nourished populations.

The 'Fetal origins hypothesis' states that individuals born small because of malnutrition are predisposed to adult diseases. Fetal malnutrition has two main causes, poor maternal nutrition and placental insufficiency. A distinction between these causes is important because it is likely that maternal nutrition has been sufficient in the majority of populations in which the fetal origins hypothesis has been tested. Thus, placental insufficiency is a more reasonable cause of reduced fetal growth in adequately nourished populations. Placental insufficiency is mainly due to inadequate vascular adaptation at the uteroplacental interface ('poor placentation'). Among women with placental insufficiency syndromes such as pre-eclampsia and 'idiopathic' intrauterine growth retardation, there is an increased prevalence of risk factors for cardiovascular diseases. Maternal cardiovascular risk factors may therefore increase the risk of adult diseases in the offspring both through direct inheritance and by interfering with uteroplacental vascular adaptation. The latter may result in placental insufficiency and fetal growth retardation that by itself could cause adult disease (as the Fetal origins hypothesis states). Alternatively, the association between low birth weight for gestational and adult disease could be an epiphenomenon, leaving inheritance as the main explanation for the fetal origins hypothesis, in adequately nourished populations.

Birth Weight↗
PubMed1988

The role of sonography in assessing severity of fetal anemia in Rh- and Kell-isoimmunized pregnancies.

Fetal hematocrit values of blood obtained by percutaneous umbilical blood sampling were correlated with ultrasound findings in 35 samples from 15 pregnancies undergoing evaluation for Rh or Kell sensitization. Intravascular fetal transfusion was performed after a low hematocrit was obtained on 29 of 35 occasions. All fetuses with sonographic evidence of hydrops had a hematocrit of 15% or less, although three fetuses with hematocrits below 15% showed no signs of hydrops. In patients followed with serial sonography, hydramnios was noted as the earliest sonographic abnormality in six of nine pregnancies. All six fetuses were anemic (hematocrit 14-26%) and required transfusion. However, in three pregnancies where the fetus was anemic (hematocrit 22%), there was no hydramnios or other sonographic abnormality. Increased placental thickness was observed in association with fetal hydrops and a hematocrit below 15% in four cases, as well as in three other cases with fetal hematocrit between 16-29% but no fetal hydrops. Measurements of umbilical vein diameter provided no useful information because no increase was observed in these measurements, even in pregnancies with advanced fetal disease evidenced by hydrops.

Anemia↗
PubMed1989

Intrauterine manometry: technique and application to fetal pathology.

A technique is described for measuring pressure within the amniotic cavity and within fetal vessels and/or body compartments. Two saline-filled catheters were connected at one end to needles inserted during indicated invasive procedures and at the other to silicon strain gauge transducers. In 36 pregnancies with normal liquor volume, stable intra-amniotic pressure (IAP, range 1-14 mmHg) increased with gestation (r = 0.48, p less than 0.01). In pregnancies complicated by severe oligohydramnios, IAP was less than or equal to 1 mm Hg and rose to normal levels with saline amnioinfusion. Raised IAP (range 17-26 mm Hg), found in pregnancies with gross polyhydramnios, fell with drainage of amniotic fluid. Subtraction manometry was used to determine supra-amniotic pressure within the intervillus space, umbilical vein, umbilical artery, abdominal and thoracic cavities, and the urinary tract in normal and/or pathological fetuses. Low intravesical and intrapelvicalyceal pressures (median 6.5, range 2-10 mm Hg) were noted in fetuses with obstructive uropathies. Intrauterine subtraction manometry appears to be a useful tool in the understanding of fetal pathophysiology and may be of clinical benefit in the therapeutic drainage and infusion of amniotic fluid and in the assessment of certain fetal disease states.

Amniotic Fluid↗
PubMed1992

What can be learned from cordocentesis?

Cordocentesis is a well-accepted procedure that is widely practiced by experienced perinatologists. Its facile and safe access to the fetal circulation has broadened the spectrum of congenital disorders diagnosed prenatally. Some fetal disease states can now be identified and treated earlier, directly, more quickly, and more effectively than before, resulting in improved patient care. Although cordocentesis has been embraced by the perinatal community, it is, by definition, a technique of obtaining a fetal blood sample. A prerequisite for the procedure to exert its full impact on perinatal care is a highly capable clinical laboratory. The facility must be aware of the commonly requested fetal serologic, hematologic, and serum chemistry studies, as well as their normal values. Efforts must be made to perform fetal blood studies rapidly and reliably on small specimens. Laboratory personnel should be familiar with the indications and pitfalls of these tests and those that are best referred to a specialty laboratory. A general understanding of the perinatologist's needs and concerns will lead to a cooperative working relationship between clinician and laboratory. In this manner, we will truly discover what can be learned from cordocentesis.

Blood Specimen Collection↗
PubMed1997

Early and midtrimester genetic amniocenteses. Safety and outcomes.

Prenatal diagnosis, the in utero determination of fetal disease, has become an important aspect of genetic counseling. The advances in technology coupled with developments in the field of molecular biology and genetics have made possible the detection of an increasing number of diseases in utero. Although not without some risk, midtrimester amniocentesis has been, and will continue to be, an important technique in this regard.

Amniocentesis↗
PubMedDate not supplied

[Evaluation of the fetal risk after echo-guided blood sampling from the umbilical cord in the 2d trimester of pregnancy].

Fetal risk related to cordocentesis has been analyzed on a series of 222 ultrasound-guided fetal blood samplings for prenatal diagnosis of fetal diseases during the second trimester of pregnancy. Affected and malformed fetuses were excluded. Seven intrauterine deaths (3.2%) and 2 spontaneous abortions (0.9%) were observed. These figures proved higher than those observed in non-homogeneous series which consider the second and third trimester altogether. The fetal risk was significantly correlated with gestational age (less than 18 weeks 7.6% vs greater than 18 weeks 0.7% p = .02) and duration of the procedure (greater than 10'11.4% vs = less than 10'0.9% p = .0029). The number of abdominal insertions resulted in different death rates (greater than 1 ins. = 6.5% vs 1 ins. = 1.4%). It is likely that different developmental, anatomical and neurovegetative mechanism play a significant role in the risk rate found in the second trimester cordocentesis. These findings and the specific risk factors observed within the different technical conditions reported, must be taken into consideration for prenatal counseling.

Abortion, Spontaneous↗
PubMed1991

In utero diagnosis of congenital varicella zoster virus infection by chorionic villus sampling and polymerase chain reaction.

Varicella zoster virus infection acquired in pregnancy is reported to cause fetal damage in 5% to 10% of cases. We used polymerase chain reaction to attempt molecular diagnosis of fetoplacental varicella zoster virus infection in two patients. Tissue obtained by chorionic villus sampling in the second trimester was analyzed by polymerase chain reaction with a varicella zoster virus-specific primer, ORF-63, and was found to be positive in both patients. Viral cultures were negative. One patient elected pregnancy termination at 23 weeks. Southern blot hybridization of neonatal brain tissue for varicella zoster virus was negative. The second patient carried the pregnancy to term and was delivered of a normal infant. Varicella zoster virus immunoglobulin M and viral cultures were negative. The presence of viral deoxyribonucleic acid sequences in placental tissue does not correlate with fetal disease.

Adolescent↗
PubMed1963

THE PATHOLOGY OF LIVER CIRRHOSIS IN PATIENTS WITH CYSTIC FIBROSIS OF THE PANCREAS.

The peculiarities of the type of liver cirrhosis that occurs in patients with cystic fibrosis of the pancreas depend on a number of factors. Two such factors, which have received little attention in the past, became apparent during a study of the livers of patients dying of this disease at the Henry Ford Hospital, Detroit. Firstly, the onset of the disease in fetal life may disturb the development of the bile duct system whose normal development is essential for normal structural relationships to be maintained in the liver. Focal lesions of intrahepatic biliary atresia will then complicate the histologic picture of "multi-lobular biliary cirrhosis". Secondly, scars formed in an infantile liver will considerably distort the subsequent growth of the liver, resulting in bizarre nodularity. Despite massive deformation large portions of the liver will still be composed of primary parenchyma that will enable normal liver functions as revealed by laboratory tests.

Bile↗