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Fetal Scalp Stimulation

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161. Abnormal Neonatal EEG (Treatment)

it difficult to interpret EEG results, which can discourage the use of EEG testing. Given the close relationships between certain morphological aspects of the developing brain and EEG results, gestational age can be reliably estimated (to ±1 wk) by EEG criteria. In fact, CNS development of the immature brain proceeds at about the same rate during fetal development as in the postnatal environment. The physiological substrate for these early EEG patterns is unknown, but is probably derived from cortical (...) generators that are strongly influenced by subcortical (primarily thalamic) afferent input. Rapid maturation of these structures (and not the corpus callosum) is most likely responsible for the interhemispheric synchrony that occurs close to full-term gestational age; in particular, rapid dendritic spine development and synaptogenesis are typical of the last month of fetal development. The complex development of cerebral sulci during this same period is probably responsible for the neonatal EEG results

2014 eMedicine.com

162. Dermatologic Manifestations of Hematologic Disease (Treatment)

criteria) for definite APS. The criteria, developed by consensus among international clinical and laboratory experts, were originally referred to in 1999 as the Sapporo criteria [ ] and then modified at a meeting in Sydney in 2006. [ ] The primary diagnostic criteria include arterial thrombosis, venous thrombosis, recurrent fetal loss, and thrombocytopenia. One of the listed primary criteria is required for diagnosis, combined with a sustained elevated titer of immunoglobulin G (IgG) anticardiolipin (...) . [ ] According to the Cooperative Study of Sickle Cell Disease, approximately 25% of patients with sickle cell disease in the United States have a history of active ulcers or developed ulcers during the 8 years of observation. The incidence is low in children younger than 10 years because of the protective effect of persistent fetal hemoglobin. Other risk factors for developing leg ulceration are anemia, male sex, combined HLA-B35 and HLA-Cw4, and antithrombin III deficiency. Based on clinical experience

2014 eMedicine.com

163. Dermatologic Manifestations of Cardiac Disease (Treatment)

Clubbing (Hypertrophic Osteoarthropathy) Definition represents a localized drumsticklike swelling of the distal segments of fingers and toes, particularly over the extensor surface. It is caused by connective tissue proliferation leading to increases in the sponginess of the soft tissue at the base of the nails due to stimulation by a humoral substance that causes dilation of the vessels of the fingertip or toe tip. [ ] Differential diagnosis Clubbing, as illustrated below, is seen in persons (...) is observed in some infants born to mothers with . This may be due to various factors, such as fetal myocarditis, idiopathic hemorrhage and necrosis involving conduction tissue, degeneration and fibrosis related in some instances to the transplacental passage of anti-Ro/ss-A antibody, and other immune complexes from mothers. Neonatal lupus erythematosus and its dermatologic manifestations were reviewed by Neiman et al. [ ] They studied 47 mothers (83% white) whose sera contained anti-SSA/Ro, anti-SSB/La

2014 eMedicine.com

164. Erythrocyte Alloimmunization and Pregnancy (Treatment)

and at 28 weeks gestation. Pending fetal blood type, the patient should also receive Rhesus Immunoglobulin following delivery. [ ] Fetal hydrops. Ultrasound image of edema of the scalp and face in a hydropic fetus. Additionally, advancements in fetal surveillance and treatment have allowed for successful outcomes for most affected fetuses. This article reviews the pathophysiology, diagnosis, and management of erythrocyte Rh D alloimmunization and includes a discussion of rarer erythrocyte antigens. Next (...) from white individuals, and agglutination was observed in 85% of the samples (Rh D positive). The remaining 15% of the samples were Rh D negative; this finding corresponds remarkably to the currently known prevalence of Rh D–negative blood type in whites. Following this discovery, Levine determined that hemolytic disease of the fetus and newborn was usually caused by Rh incompatibility (ie, the fetal stimulation of Rh D antibody development in an Rh D–negative woman). In 1953, Chown verified

2014 eMedicine.com

165. Preoperative Evaluation and Management (Follow-up)

controlled, and the insulin doses should be adjusted as needed. Management of hypoglycemic agents and different types of insulin can be pivotal. [ ] Hypertension A history of hypertension should alert the physician to check the patient's blood pressure. Patients with elevated pressures may bleed profusely. This is especially true when working on larger areas of the body or in highly vascular regions, such as the scalp. Hypertension is an important cause of perioperative bleeding and hematoma formation (...) , can cause bone growth retardation and staining of dental enamel in the fetus. Lidocaine also appears to be safe in low doses, although excessive amounts can cause fetal CNS and cardiac depression. Acetaminophen (Class B) is routinely used during pregnancy despite its ability to cross the placenta. [ ] Drugs should also be selected carefully during lactation. [ ] Snoring/sleep apnea Eighty percent of patients with breathing problems related to sleep disorders are male. Conscious sedation may

2014 eMedicine.com

166. Postterm Pregnancy (Follow-up)

be reviewed. Finally, intrapartum fetal surveillance in an attempt to document fetal intolerance to labor before it leads to acidosis is critical. Whether continuous fetal monitoring or intermittent auscultation is used, interpretation of the results by a well-trained clinician is of paramount importance. If the fetal heart rate tracing is equivocal, fetal scalp stimulation and/or fetal scalp blood sampling may provide the reassurance necessary to justify continuing the induction of labor (...) management of the pregnancy, or (3) antenatal testing. Each of these 3 options may be used at any particular time during this 2-week period. Note that if the pregnancy is at risk for an adverse outcome from an underlying condition, either maternal or fetal, inducing labor may proceed without documented lung maturity. Also, an elective induction of labor may proceed at or after 39 weeks of gestation in the absence of documented lung maturity provided that 36 weeks have elapsed since documentation

2014 eMedicine.com

167. Platelet Disorders (Follow-up)

the presence of petechiae and ecchymoses. The presence of lymphadenopathy or suggests other secondary causes of thrombocytopenia rather than ITP. The peripheral smear shows a decreased number of platelets. Often, the smear shows giant platelets, which is a reflection of increased thrombopoietin-induced stimulation of the bone marrow (see images below). Examination of the peripheral smears in immune thrombocytopenic purpura often shows giant platelets. These platelets reflect the increased megakaryocytic (...) mass in the marrow. Peripheral smear of a patient with Bernard-Soulier syndrome showing giant platelets. These platelets are not counted as platelets in most particle counters. At times, the smear may show eosinophilia and lymphocytosis, possibly reflecting hypersensitivity to the inciting viral antigens. The bone marrow shows an increase in the number of megakaryocytes and signs of thrombopoietin-induced megakaryocyte stimulation (increase in number and ploidy, decrease in cytoplasm), resulting

2014 eMedicine.com

168. Normal Labor and Delivery (Follow-up)

cardiotocography. This review concluded that continuous cardiotocography during labor is associated with a reduction in neonatal seizures but not cerebral palsy or infant mortality; however, continuous monitoring is associated with increased cesarean and operative vaginal deliveries. [ ] If nonreassuring fetal heart rate tracings by cardiotography (eg, late decelerations) are noted, a fetal scalp electrode may be applied to generate sensitive readings of beat-to-beat variability. However, a fetal scalp (...) be accomplished with blood sampling from fetal scalp capillaries. This procedure allows for a direct assessment of fetal oxygenation and blood pH. A pH of < 7.20 warrants further investigation for the fetus' well-being and for possible resuscitation or surgical intervention. Routine laboratory studies of the parturient, such as complete blood cell (CBC) count, blood typing and screening, and urinalysis, are usually performed. Intravenous (IV) access is established. Previous Next: Intrapartum Management

2014 eMedicine.com

169. Abnormal Neonatal EEG (Overview)

it difficult to interpret EEG results, which can discourage the use of EEG testing. Given the close relationships between certain morphological aspects of the developing brain and EEG results, gestational age can be reliably estimated (to ±1 wk) by EEG criteria. In fact, CNS development of the immature brain proceeds at about the same rate during fetal development as in the postnatal environment. The physiological substrate for these early EEG patterns is unknown, but is probably derived from cortical (...) generators that are strongly influenced by subcortical (primarily thalamic) afferent input. Rapid maturation of these structures (and not the corpus callosum) is most likely responsible for the interhemispheric synchrony that occurs close to full-term gestational age; in particular, rapid dendritic spine development and synaptogenesis are typical of the last month of fetal development. The complex development of cerebral sulci during this same period is probably responsible for the neonatal EEG results

2014 eMedicine.com

170. Paraneoplastic Diseases (Follow-up)

have papillomatous thickening of the oral mucosa. Patients who have AN associated with malignancies also have skin changes involving the scalp, areolae, and eyelids. The appearance of paraneoplastic AN usually coincides with the presence of malignancy, but it can precede or follow the diagnosis of cancer and thus may signal a relapse in patients with a history of cancer. Diagnosis The diagnosis of AN is based on clinical findings alone and can be supported by the histopathologic changes (...) include symmetrical, scaly, violaceous plaques on the acral surfaces, with severe forms progressing to bullae. The lesions predominantly occur on the hands, feet, ear helices, nose tip, and scalp. Skin changes may spread to involve the knees, elbows, and malar surface of the face. [ ] Bazex syndrome occurs more commonly in men older than 40 years. [ ] Alopecia and nail changes are common and can be early findings. Subungual hyperkeratosis, onychodystrophy, and white flaking of the nail surface

2014 eMedicine.com

171. Surgical Treatment of Parkinson Disease (Follow-up)

, dopaminergic) The target area is well defined (ie, striatum) Postsynaptic receptors are relatively intact The neurons provide tonic stimulation of the receptors and appear to serve a modulatory function In double-blind studies, neither transplantation of autologous adrenal medullary cells nor transplantation of fetal porcine cells has been found to be effective; both have been abandoned. Although open-label studies of fetal dopaminergic cell transplantation yielded promising results, 3 randomized, double (...) physiologically. Medtronics Activa Tremor control system consists of 3 components: (1) stimulating lead, which is implanted to desired target; (2) extension cable, which is tunneled under scalp and soft tissues of neck to anterior chest wall; and (3) pulse generator, which is programmable source of electrical impulses. Stereotactic headframe is applied at start of surgery. MRI-localizing box is attached to frame only during targeting MRI. Localizer defines working volume of frame and provides reference

2014 eMedicine.com

172. Surgical Treatment of Tremor (Follow-up)

, dopaminergic) The target area is well defined (ie, striatum) Postsynaptic receptors are relatively intact The neurons provide tonic stimulation of the receptors and appear to serve a modulatory function In double-blind studies, neither transplantation of autologous adrenal medullary cells nor transplantation of fetal porcine cells has been found to be effective; both have been abandoned. Although open-label studies of fetal dopaminergic cell transplantation yielded promising results, 3 randomized, double (...) physiologically. Medtronics Activa Tremor control system consists of 3 components: (1) stimulating lead, which is implanted to desired target; (2) extension cable, which is tunneled under scalp and soft tissues of neck to anterior chest wall; and (3) pulse generator, which is programmable source of electrical impulses. Stereotactic headframe is applied at start of surgery. MRI-localizing box is attached to frame only during targeting MRI. Localizer defines working volume of frame and provides reference

2014 eMedicine.com

173. Teratology and Drug Use During Pregnancy (Follow-up)

with clinically significant risks in pregnancy. In rare cases, promotility agents can be prescribed, though the risks and benefits must carefully be discussed with the patients before the drugs are started. A physician caring for a pregnant patient who requires medication should take care in choosing dosages and types of drugs that maximize effectiveness while minimizing fetal risk. It is essential to understand the effect of medications and to know the point in fetal development when drugs are most toxic (...) and which fetal organs are most susceptible. In addition, healthcare providers who treat pregnant women must be familiar with methods of gathering information about drugs, and they must be aware of online databases that are most useful for this purpose. Several resources are available to expand one’s knowledge of teratology. Teratogen Information System (TERIS) and Reprotox are Internet databases that cover this subject. The Organization of Teratology Information Specialists is a network of risk

2014 eMedicine.com

174. Childhood HIV Disease (Follow-up)

Flucytosine Amphotericin Sulfonamides Trimethoprim, trimethoprim-sulfamethoxazole Pyrimethamine Pentamidine Infectious agents such as parvovirus B19 can cause myelosuppression, as can invasive neoplastic processes of the marrow. Granulocyte-macrophage colony-stimulating factor (GM-CSF) and granulocyte colony-stimulating factor (G-CSF) are used to treat neutropenia and to promote granulocyte production and function. GM-CSF has more adverse effects than G-CSF, and it promotes viral replication. However, GM (...) in poor nutritional intake. Appetite stimulants can be useful. High-energy, high-protein nutritional supplements are commonly needed. Caretakers must be instructed to avoid giving the child any food or water that has a high risk of being contaminated with any infectious agent. HIV and accompanying opportunistic infections can worsen GI symptoms. Nasogastric, nasojejunal, and/or gastrostomy tubes may be needed to support the patient's nutritional and fluid status. Gastrostomy tubes are well tolerated

2014 eMedicine.com

175. Dermatologic Manifestations of Cardiac Disease (Follow-up)

Clubbing (Hypertrophic Osteoarthropathy) Definition represents a localized drumsticklike swelling of the distal segments of fingers and toes, particularly over the extensor surface. It is caused by connective tissue proliferation leading to increases in the sponginess of the soft tissue at the base of the nails due to stimulation by a humoral substance that causes dilation of the vessels of the fingertip or toe tip. [ ] Differential diagnosis Clubbing, as illustrated below, is seen in persons (...) is observed in some infants born to mothers with . This may be due to various factors, such as fetal myocarditis, idiopathic hemorrhage and necrosis involving conduction tissue, degeneration and fibrosis related in some instances to the transplacental passage of anti-Ro/ss-A antibody, and other immune complexes from mothers. Neonatal lupus erythematosus and its dermatologic manifestations were reviewed by Neiman et al. [ ] They studied 47 mothers (83% white) whose sera contained anti-SSA/Ro, anti-SSB/La

2014 eMedicine.com

176. Dermatologic Manifestations of Hematologic Disease (Follow-up)

criteria) for definite APS. The criteria, developed by consensus among international clinical and laboratory experts, were originally referred to in 1999 as the Sapporo criteria [ ] and then modified at a meeting in Sydney in 2006. [ ] The primary diagnostic criteria include arterial thrombosis, venous thrombosis, recurrent fetal loss, and thrombocytopenia. One of the listed primary criteria is required for diagnosis, combined with a sustained elevated titer of immunoglobulin G (IgG) anticardiolipin (...) . [ ] According to the Cooperative Study of Sickle Cell Disease, approximately 25% of patients with sickle cell disease in the United States have a history of active ulcers or developed ulcers during the 8 years of observation. The incidence is low in children younger than 10 years because of the protective effect of persistent fetal hemoglobin. Other risk factors for developing leg ulceration are anemia, male sex, combined HLA-B35 and HLA-Cw4, and antithrombin III deficiency. Based on clinical experience

2014 eMedicine.com

177. Hyperthyroidism (Follow-up)

(albeit rarely) with cloacal and scalp (cutis aplasia) abnormalities when given during early gestation. [ , ] Generally, if a nonpregnant woman who is receiving methimazole desires pregnancy, she should be switched to propylthiouracil before conception. After 12 weeks of gestation, she can be switched back to methimazole, with frequent monitoring. Propylthiouracil remains the drug of choice in uncommon situations of life-threatening severe thyrotoxicosis (ie, thyroid storm) because of the additional (...) vasculitis. All of these adverse effects, except agranulocytosis, occur more frequently with propylthiouracil: agranulocytosis occurs in 0.2-0.5% of patients overall and is no more common with one drug than with the other. Patients with agranulocytosis usually present with fever and pharyngitis. After the drug is stopped, granulocyte counts usually start to rise within several days but may not normalize for 10-14 days. Granulocyte colony-stimulating factor (G-CSF) appears to accelerate recovery

2014 eMedicine.com

178. Erythrocyte Alloimmunization and Pregnancy (Follow-up)

and at 28 weeks gestation. Pending fetal blood type, the patient should also receive Rhesus Immunoglobulin following delivery. [ ] Fetal hydrops. Ultrasound image of edema of the scalp and face in a hydropic fetus. Additionally, advancements in fetal surveillance and treatment have allowed for successful outcomes for most affected fetuses. This article reviews the pathophysiology, diagnosis, and management of erythrocyte Rh D alloimmunization and includes a discussion of rarer erythrocyte antigens. Next (...) from white individuals, and agglutination was observed in 85% of the samples (Rh D positive). The remaining 15% of the samples were Rh D negative; this finding corresponds remarkably to the currently known prevalence of Rh D–negative blood type in whites. Following this discovery, Levine determined that hemolytic disease of the fetus and newborn was usually caused by Rh incompatibility (ie, the fetal stimulation of Rh D antibody development in an Rh D–negative woman). In 1953, Chown verified

2014 eMedicine.com

179. Histiocytosis (Diagnosis)

macrophages. Normal histiocytes originate from pluripotent stem cells, which can be found in bone marrow. [ ] Under the influence of various cytokines (eg, stem cell factor [SCF], granulocyte colony-stimulating factor [G-CSF], granulocyte-macrophage colony-stimulating factor [GM-CSF], tumor necrosis factor-alpha [TNF-alpha], interleukin [IL]-3, IL-4, and others), histiocytes can become committed, differentiating into specific groups of specialized cells. Committed histiocytes can mature into one of two (...) lymphocytes has been increasingly recognized. Dendritic cells appear to develop in several pathways. [ ] Immature dendritic cells respond to GM-CSF (not to macrophage colony-stimulating factor [M-CSF]) and become committed to generating dendritic cells, which are “professional” antigen-presenting cells (APCs). [ ] These cells can capture antigen and migrate to lymphoid organs, where they present the antigens to naive T cells. [ ] Dendritic cells are also efficient stimulators of B-cell lymphocytes

2014 eMedicine Pediatrics

180. Human Immunodeficiency Virus Infection (Follow-up)

Flucytosine Amphotericin Sulfonamides Trimethoprim, trimethoprim-sulfamethoxazole Pyrimethamine Pentamidine Infectious agents such as parvovirus B19 can cause myelosuppression, as can invasive neoplastic processes of the marrow. Granulocyte-macrophage colony-stimulating factor (GM-CSF) and granulocyte colony-stimulating factor (G-CSF) are used to treat neutropenia and to promote granulocyte production and function. GM-CSF has more adverse effects than G-CSF, and it promotes viral replication. However, GM (...) in poor nutritional intake. Appetite stimulants can be useful. High-energy, high-protein nutritional supplements are commonly needed. Caretakers must be instructed to avoid giving the child any food or water that has a high risk of being contaminated with any infectious agent. HIV and accompanying opportunistic infections can worsen GI symptoms. Nasogastric, nasojejunal, and/or gastrostomy tubes may be needed to support the patient's nutritional and fluid status. Gastrostomy tubes are well tolerated

2014 eMedicine Pediatrics

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