Items tagged “rg_39_3_edit”
10 results found
Article
Twin pregnancy
Twin pregnancies are the most common multifetal pregnancies.
Epidemiology
Multifetal pregnancies account for ~1% of all pregnancies but are seen in much higher numbers in populations where in vitro fertilisation (IVF) is a common practice.
Classification
A twin pregnancy can be broadly cate...
Article
Deep brain stimulation
Deep brain stimulation is used in a variety of clinical settings, predominantly in patients with poorly controlled movement disorders. Although effective, its exact mode of function continues to be poorly understood 2.
Careful patient selection and target selection are essential if the proced...
Article
Uterine artery flow notching
Uterine artery flow notching refers to a phenomenon observed in uterine arterial Doppler ultrasound assessment.
Pathology
Associations
The presence of notching after 22 weeks is associated with several other conditions including adverse pregnancy outcomes. These include
pregnancy induced hyp...
Article
Abnormal ductus venosus waveforms
Abnormal ductus venosus waveforms can arise in a number of conditions ranging from aneuploidy to vascular malformations and fetal tumours. "A wave" reversal can be seen in 5% of euploid fetuses 9.
Pathology
Abnormal waveforms in fetal ductus venosus flow assessment can occur in a number of sit...
Article
Fetal ductus venosus flow assessment
Fetal ductus venosus flow assessment can be useful in a number of situations in fetal ultrasound:
first-trimester screening for aneuploidic anomalies
second and third-trimester scanning when there are concerns regarding
intrauterine growth restriction (IUGR)
fetal cardiac compromise
Of all ...
Article
Umbilical venous flow assessment
Umbilical venous flow in the physiological situation comprises of a monophasic non-pulsatile flow pattern in the umbilical vein with a mean velocity of 10-15 cm/s. Since a normal umbilical vein supplies a continuous forward flow of oxygenated blood to the fetal heart, the presence of pulsatility...
Article
Umbilical arterial Doppler assessment
Umbilical arterial (UA) Doppler assessment is used to survey fetal well-being in the third trimester of pregnancy. Abnormal umbilical artery Doppler is a marker of placental insufficiency and consequent intrauterine growth restriction (IUGR) or suspected pre-eclampsia.
Umbilical artery Doppler...
Article
Rhombencephalon
The rhombencephalon (plural: rhombencephalons or rhombencephala), or hindbrain is a primary vesicle of the neural tube.
Development
During the fifth week of embryological development, the rhombencephalon further subdivides into the secondary brain vesicles, the metencephalon and the myelenceph...
Article
Cavernous sinus haemangioma
Cavernous sinus haemangioma is an uncommon cause of a cavernous sinus mass. Preoperative diagnosis is important to avoid unexpected surgical blood loss.
Epidemiology
Cavernous haemangiomas of the cavernous sinus account for less than 1% of all parasellar masses 1. They have a predilection for...
Article
Laryngeal trauma
Laryngeal trauma is uncommon in the setting of external blunt or penetrating trauma. The larynx may also be injured internally, for example during endotracheal intubation.
Clinical presentation
Symptoms include hoarseness, laryngeal pain, dyspnoea, and/or dysphagia. Also, stridor, haemoptysis,...
Unable to process the form. Check for errors and try again.