Twins in Society: Parents, Bodies, Space, and Talk (Palgrave Macmillan; 2010) 221 pages; explores the experience of child twins, adult twins, and parents of twins, with a focus on Britain. Nieuwint, Aggie; Van Zalen-Sprock, Rieteke; Hummel, Pieter; Pals, Gerard; Van Vugt, John;  et al. (1999). "Identical twins with discordant karyotypes". Prenatal Diagnosis. 19 (1): 72–6. doi:10.1002/(SICI)1097-0223(199901)19:1<72::AID-PD465>3.0.CO;2-V. PMID 10073913. S2CID 19112883. Wenk RE, Houtz T, Brooks M, Chiafari FA (1992). "How frequent is heteropaternal superfecundation?". Acta Geneticae Medicae et Gemellologiae. 41 (1): 43–7. doi:10.1017/S000156600000249X. PMID 1488855. S2CID 23507167. Girela, Eloy; Lorente, Jose A.; Alvarez, J. Carlos; Rodrigo, Maria D.; Lorente, Miguel;  et al. (1997). "Indisputable double paternity in dizygous twins". Fertility and Sterility. 67 (6): 1159–61. CiteSeerX 10.1.1.378.4082. doi:10.1016/S0015-0282(97)81456-2. PMID 9176461. Shinwell ES, Reichman B, Lerner-Geva L, Boyko V, Blickstein I (September 2007). ""Masculinizing" effect on respiratory morbidity in girls from unlike-sex preterm twins: a possible transchorionic paracrine effect". Pediatrics. 120 (3): e447–53. doi:10.1542/peds.2006-3574. PMID 17766488. S2CID 20498737. Retrieved 2008-10-06. Lummaa V, Pettay JE, Russell AF (June 2007). "Male twins reduce fitness of female co-twins in humans". Proceedings of the National Academy of Sciences of the United States of America. 104 (26): 10915–20. Bibcode:2007PNAS..10410915L. doi:10.1073/pnas.0605875104. PMC 1904168. PMID 17576931. Schein, Elyse; Paula Bernstein (2007). Identical Strangers: A Memoir of Twins Separated and Reunited. New York: Random House. ISBN 978-1-4000-6496-0. OCLC 123390922. Helle, Samuli; Virpi Lummaa; Jukka Jokela (2004). "Selection for Increased Brood Size in Historical Human Populations" (PDF). Evolution. 58 (2): 430–436. doi:10.1111/j.0014-3820.2004.tb01658.x. PMID 15068359. S2CID 9460009. Archived from the original (PDF) on 2008-10-02.
B-type natriuretic peptide (BNP) is available in many hospitals, sometimes even as a point-of-care test. Low levels of BNP (<100 pg/ml) suggest a cardiac cause is unlikely. Prevention
In those with underlying heart or lung disease, effective control of congestive and respiratory symptoms helps prevents pulmonary edema.Dexamethasone is in widespread use for the prevention of high altitude pulmonary edema. Sildenafil is used as a preventive treatment for altitude-induced pulmonary edema and pulmonary hypertension, the mechanism of action is via phosphodiesterase inhibition which raises cGMP, resulting in pulmonary arterial vasodilation and inhibition of smooth muscle cell proliferation and indirectly fluid formation in the lungs. While this effect has only recently been discovered, sildenafil is already becoming an accepted treatment for this condition, in particular in situations where the standard treatment of rapid descent (acclimatization) has been delayed for some reason. Management
The initial management of pulmonary edema, irrespective of the type or cause, is supporting vital functions while edema lasts. Therefore, if the level of consciousness is decreased it may be required to proceed to tracheal intubation and mechanical ventilation to prevent airway compromise. Hypoxia (abnormally low oxygen levels) may require supplementary oxygen to balance blood oxygen levels, but if this is insufficient then again mechanical ventilation may be required to prevent complications caused by hypoxia. Treatment of the underlying cause is the next priority; pulmonary edema secondary to infection, for instance, would require the administration of appropriate antibiotics or antivirals. Cardiogenic pulmonary edema
Acute cardiogenic pulmonary edema often responds rapidly to medical treatment. Positioning upright may relieve symptoms.