Read Oxford Handbook of Midwifery Online
Authors: Janet Medforth,Sue Battersby,Maggie Evans,Beverley Marsh,Angela Walker
The CEMACH report
1,2
has provided an overview of the findings and recommendations specifically related to midwives and their practice. This is intended to stimulate debate on what lessons can be learned from the management of the women who died. There are detailed recommendations on antenatal care and specific guidance for developing ways to meet the needs of women in the above-named groups.
London: CEMACH. Available at: M
www.cemach.org.uk (accessed 25.2.11).
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CHAPTER 19
Emergencies
Blood tests results during pregnancy, detecting deviations from the norm
Table 19.3
Haematalogical values during pregnancy: detecting deviations from normal
Test | Non- pregnant | Pregnancy | PIH/PET | DIC | Notes | Causes of abnormal result |
Full blood count | ||||||
Haemoglobin (g/dL | 11.5–16.5 | (d) 11.0 | – | – | Normal reduction in pregnancy (physiological). | Anaemia due to any cause Haemolysis in HELLP. Also |
decreased in some | ||||||
haemoglobinopathies | ||||||
Packed cell | 0.35–0.47 | (d) 0.34–0.36 | – | – | Decrease PCV represents | |
volume (PCV) | increased plasma to red cell | |||||
ratio seen in pregnancy | ||||||
White cell count (x10 | 6(4–11) | (i) 9–11 | – | – | Normal increase through pregnancy. Polymorphonuclear | Labour can (i) levels to 13–15. infection causes (i levels. |
cells | ||||||
Platelet count (×10 | 150 000– 350 000 | 140 000– 440 000 | (d) to (d d) | <50 000 | Decreased platelet count affects blood clotting efficiency. | Idiopathic (ITP), PIH, HELLP |
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BLOOD TESTS RESULTS DURING PREGNANCY
Test | Non- pregnant | Pregnancy | PIH/PET | DIC | Notes | Causes of abnormal result |
Coagulation | ||||||
Prothrombin time | 10–12 | 10–12 | May (i) | >100 | Measures II, V, VII, and X | Increased with liver problems |
(seconds) | or anticoagulant use (warfarin). | |||||
Partial | 35–45 | 35–50 | May (i) | >100 | Measures II, V, VIII, IX, X, | Increased in factor VII, IX and X |
thromboplastin | and XI | deficiency and heparin use. | ||||
time (seconds) | ||||||
Thrombin time | 16–20 | 15–20 | May (i) | >100 | ||
(seconds) | ||||||
Fibrinogen (mg/dL | 150–400 | 450 | May (d) | (d) to (d d) | Normally increased in pregnancy. Hepatic dysfunction | PIH/HELLP, major haemorrhage and DIC |
affects production. | ||||||
FiDPs (micrograms/mL | <5 | <16 | May (i) | >200 | Raised levels are evidence of clot breakdown | (i) levels are seen in thrombo- embolic disease (pulmonary |
embolism/DVT). Also (i) in | ||||||
small APH and DIC. |