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Twin anemia-polycythemia sequence (TAPS) is a chronic type of unbalanced fetal transfusion in monochorionic twins that results in polycythemia in the TAPS recipient and anemia in the TAPS donor due to tiny placental anastomoses. [1] Post-laser TAPS and spontaneous TAPS are the two forms of TAPS.
Twin Anemia-Polycythemia Sequence; Twin-to-twin transfusion syndrome; U. Ulysses syndrome; Uncombable hair syndrome; Uner Tan syndrome; Upper airway resistance syndrome;
Polycythemia is defined as serum hematocrit (Hct) or hemoglobin (HgB) exceeding normal ranges expected for age and sex, typically Hct >49% in healthy adult men and >48% in women, or HgB >16.5 g/dL in men or >16.0 g/dL in women. [8]
"Twin Anemia Polycythemia Sequence," she explained, naming a condition in which "blood flows unequally between twins that share a placenta (monochorionic), resulting in one fetus receiving more ...
Twin anemia–polycythemia sequence (TAPS) may occur after laser surgery for TTTS (post-laser form). The spontaneous form of TAPS complicates approximately 3–5% of monochorionic twin pregnancies, whereas the post-laser form occurs in 2–13% of TTTS cases.
Twin anemia-polycythemia sequence; Procedures involving fluid removal through a needle: Lumbar puncture, also known as a spinal tap; Paracentesis, also known as an abdominal tap; Thoracentesis / thoracocentesis, also known as a pleural tap
Twin-twin transfusion syndrome (TTTS) in pregnancies in which twins share a single placenta (hydrops affects the recipient twin) Twin anemia-polycythemia sequence (TAPS) Twin reversed arterial perfusion sequence (TRAPS) Maternal hyperthyroidism; Fetal cardiac defects and skeletal defects; Noonan syndrome
The other twin is usually normal in appearance. The normal twin, called the pump twin, drives blood through both fetuses. It is called "reversed arterial perfusion" because in the acardiac twin the blood flows in a reversed direction. [4] [5] TRAP sequence occurs in 1% of monochorionic twin pregnancies and 1 in 35,000 pregnancies overall. [6]
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