Kratochwil E Eisenhut L. Der Fruheste Nachweis Der Fatalen Herzaction Durch
1. Kratochwill E, Eisenhut L. Der fr heste nachweis der fatalen herzaction durch ultrascall. Geburtsh Frauenheik 1967 27 176-80. 2. Waldenstrom U, Axelsson O, Nilsson S. Sonographic dating of pregnancies conceived after contraceptive pill therapy. Ultrasound Obstet Gynecol 1993 3 23-25. 3. Barlow DH. Short- and long-term risks for women having IVF - what is the evidence Hum Fertil 1999 2 102-6. 4. Rizk B, Tan SL, Morcos S, et al. Heterotopic pregnancies after in vitro fertilization and embryo...
Endocrinological tests
In most cases of early pregnancy assessment, hCG and progesterone assays are not required unless the location of the pregnancy is in doubt. Knowledge of the 'normal' increases in hCG levels in early pregnancy are useful as a guide after a non-diagnostic ultrasound of pregnancy of unknown location, provided they are combined with other features such as clinical symptoms, other ultrasound findings and progesterone results.5,6 The hCG 'doubling time' is used as a guide to the viability and...
Clinical Symptoms And Risk Factors For Ectopic Pregnancy
When evaluating pregnant women in the first trimester, it is very important to take into account the history and symptomatology. The Figure 3.4 Blood in the pouch of Douglas seen as ground glass fluid on transvaginal scan. Reproduced from Condous et al. Ultrasound Obstet Gynecol 2003 2 420-30. Figure 3.4 Blood in the pouch of Douglas seen as ground glass fluid on transvaginal scan. Reproduced from Condous et al. Ultrasound Obstet Gynecol 2003 2 420-30. end of the fallopian tube. It is very...
Threatened Miscarriage
Women who present in the first trimester with vaginal bleeding with or without lower abdominal pain are given the label of a threatened miscarriage. This is a common first trimester problem occurring in up to one-third of pregnancies.19 This condition requires an ultrasound scan to establish the viability of the pregnancy. If the uterus contains an embryopositive cardiac activity, then the woman can be reassured that she has a viable intrauterine pregnancy. If the crown-rump length CRL is at...
Last menstrual period LMP and cycle length
Knowledge of the first day of the LMP and the cycle length in any individual can alter the Table 2.1. Correction of dates for cycle expected gestation and therefore the ultrasound findings considerably and may make the difference between seeing an early pregnancy and having a non-diagnostic scan that necessitates follow-up. Correction for cycle length is therefore important if the length deviates by 7 or more days from a 28-day cycle Table 2.1 . It should be remembered, however, that recall of...
When should you see a yolk sac
The discriminatory level for a yolk sac with transabdominal ultrasound was a mean gestation sac diameter MSD of 20 mm.9 Early TVS described a discriminatory level for the yolk sac of 8 mm.10 More recently Rowling et al.11 found that with 5 MHz transducers the yolk sac is definitively seen by a MSD of 13 mm but with newer 5-9 MHz transducers a yolk sac was definitively seen by the time the MSD was 5 mm. The presence of a larger sac with no evidence of yolk sac formation contained within it is a...
The ultrasound scan
Before embarking on an ultrasound it helps to ask yourself a few questions 1. What am I trying to find out by performing 2. Does the scan need to be performed now or can it wait 3. Will the scan change my management 4. What type of scan do I need to perform i.e. transvaginal or transabdominal In the emergency setting, your decision to perform an ultrasound may not always be correct and we have all been in the situation when we wish that we had not Always be sure that you are competent to...
Complete Miscarriage
This should not be based on an ultrasound diagnosis. Women who present with heavy vaginal bleeding with clots and undergo an ultrasound scan which suggests a complete miscarriage i.e. an empty uterus with an endometrial thickness less than 15 mm , should be followed up with serum hCG levels until the diagnosis is established.24 We have described Figure 3.5 Haemorrhagic corpus luteum classic internal 'spider web'-like appearance on transvaginal scan. Figure 3.5 Haemorrhagic corpus luteum classic...
NORMAL HUMAN DEVELOPMENT TABLE 22 Week 4
Ultrasound scanning at this very early gestation can be difficult because of the reasons stated above. Often the only ultrasound feature visible is a thickening of the endometrium and the presence of a corpus luteum cyst. The deciduo-placental interface and the exocoelomic cavity ECC are the first sonographic evidence of a pregnancy that can be visualized with TVS from around 4 4-4 6 menstrual weeks 32-34 days when they reach together a size of 2 to 4 mm visible at approximately 5 weeks or 10...
When Are Serial Hcg Determinations Appropriate
Serial hCG determinations are appropriate to exclude ectopic pregnancy in a woman with a serum hCG level below the discriminatory zone in whom there is a concern about the possibility of extrauterine pregnancy. This concept is discussed in detail elsewhere in this book. However once an ectopic pregnancy has been excluded, any assessment of embryonic wellbe-ing depends on serial ultrasound examinations and not serial hCG determinations. These are unnecessary. Although average serum hCG levels...
Transvaginal Versus Transabdominal Approach
This should no longer be a debate. If the urinary pregnancy test is positive, TVS should be performed, preferably in a dedicated Early Pregnancy Unit EPU by an ultrasonographer or gynaecologist trained in the management of early pregnancy complications. Not only does TVS confirm viability and gestation, but most importantly it confirms the location of the pregnancy.5,6 In a recent study of 6621 consecutive women, 91.2 had their pregnancy location confirmed at the initial TVS.7 In approximately...
What about cardiac activity
The endothelial heart tube folds on itself and begins to beat 21 days post conception. Thus any pregnancy whose outcome is ultimately normal has cardiac activity present in the early embryo prior to our ability to image it. The question is therefore not how early we can see cardiac activity the threshold level but at what point if cardiac activity is not seen with TVS is Figure 4.7 A transvaginal scan at 58 days' gestation. A routine scan 9 days previously had revealed an embryo of 7 mm with...
When should you see a gestational sac
Usually by 5 weeks LMP 3 weeks post conception a gestational sac will be visualized. However, virtually all clinicians know that menstrual dating is notoriously unreliable. Therefore the concept of a discriminatory level of hCG was developed. The discriminatory level of hCG was originally described in 1981.6 The initial report was with transabdominal ultrasound and equalled 6500IU L. This was updated in 1985 by Nyberg et al.7 to 3600 IU L. Transvaginal ultrasonography led to the level being...
Ectopic Pregnancy 8 Weeks
For years the management of early pregnancy complications was very much the poor relation when training in gynaecology. In general the most junior doctor available was delegated to see the patient and perform any surgery, if indicated. Yet they are among the most common conditions seen by gynaecologists and cause a huge amount of anxiety and distress for patients. The introduction of transvaginal ultrasono-graphy, laparoscopic surgery and the rapid measurement of serum hCG levels has radically...
Setting up and running an Early Pregnancy Unit space staffing and equipment
Introduction Logistical requirements Record keeping Laboratory services Emergency operating theatres Information and protocols Additional services Conclusion Practical points Early pregnancy complications represent a significant number of attendances both to primary care and hospital emergency A amp E departments. Considering at least one in four pregnant women will have a miscarriage in the first trimester, and up to one in 50 will have an ectopic pregnancy, the rapid identification,...