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Definition procedure that does not involve the introduction of instruments into the body Reference "non-invasive" adjective > The Oxford Dictionary of English (revised edition) > Ed. Catherine Soanes & Angus Stevenson > Oxford University Press, 2005 > Oxford Reference Online > DGT, http://www.oxfordreference.com/views/ENTRY.html?subview=Main&entry=t140.e52478 (2.7.2009)
Definition analysis of cell-free maternal and fetal DNA in the mother’s blood as a prenatal test for Down’s syndrome Reference COM-EN, based on:Antenatal Results & Choices (ARC) (UK charity helping parents and professionals through antenatal screening and its consequences) > Tests explained > Non-Invasive Prenatal Testing (NIPT) for Down’s syndrome (also known as cfDNA screening), http://www.arc-uk.org/tests-explained/non-invasive-prenatal-testing-nipt [4.4.2017]
Comment Although this test is not diagnostic, large-scale studies show that the test has a detection rate of over 99%. So it is currently a very sensitive screening test for Down’s syndrome, and can also look for Edwards’ and Patau’s syndrome. It is a non-invasive procedure with no accompanying risk of miscarriage.Reference: Antenatal Results & Choices (ARC) (UK charity helping parents and professionals through antenatal screening and its consequences) > Tests explained > Non-Invasive Prenatal Testing (NIPT) for Down’s syndrome (also known as cfDNA screening), http://www.arc-uk.org/tests-explained/non-invasive-prenatal-testing-nipt [4.4.2017]
Definition provision of ventilatory support through the patient's upper airway using a mask or similar device and without using a technique which bypasses the upper airway with a tracheal tube, laryngeal mask, or tracheostomy Reference COM-Terminology Coordination, based on:British Thoracic Society Standards of Care Committee, 'Non-invasive ventilation in acute respiratory failure' (6.8.2020), Thorax 2002; 57:192-211.