M
Mark P. Johnson
Researcher at Children's Hospital of Philadelphia
Publications - 271
Citations - 13920
Mark P. Johnson is an academic researcher from Children's Hospital of Philadelphia. The author has contributed to research in topics: Fetal surgery & Prenatal diagnosis. The author has an hindex of 59, co-authored 270 publications receiving 12701 citations. Previous affiliations of Mark P. Johnson include University of Pennsylvania.
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Journal ArticleDOI
Systemic and renal hemodynamic consequences of manipulation of serum calcium and/or parathyroid hormone in the intact conscious mongrel dog.
TL;DR: Elevation of peripheral resistance due to acute Ca elevations was accompanied by decreased serum Mg and decreased renal prostaglandin excretion, and the renal circulation was resistant to acute manipulation of ionized serum calcium and PTH.
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NIH sponsored prospective randomized clinical trial of amnioreduction vs selective fetoscopic laser photocoagulation for twin-twin transfusion syndrome
Timothy M. Crombleholme,David Shera,Flint Porter,Hanmin Lee,Chyu Jacquelyn,Richard K. Silver,Alfred Abuhamad,Mark P. Johnson,George R. Saade,D'alton Mary,Larry Shields,Kauffman David,Joanne Stone,Jeffrey Livingston,William Polzin,Robert P. Lorenz,Bruce K. Young,David Miller,Anthony Odibo,Jack Rychik,Lynn L. Simpson,Vickie A. Feldstein,Beverly G. Coleman,Eduardo Ruchelli,Larissa T. Bilaniuk,Erin M. Simon,Betty R. Vohr,Istvan Seri +27 more
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Creating a state-of-the-art center for fetal diagnosis and treatment: Importance of a multidisciplinary approach
TL;DR: The creation of a state-of-the-art Center for Fetal Diagnosis and Treatment based upon the experience at The Children's Hospital of Philadelphia is discussed.
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Precise gaussian distribution functions of maternal serum α-fetoprotein and free β-subunit of human chorionic gonadotropin for trisomy 21 screening: Improved accuracy for patient counseling
Lawrence Chik,Kevin Spencer,Mark P. Johnson,Mazin Ayoub a,Eric L. Krivchenia,Mitchell P. Dombrowski,Robert J. Sokol,Mark I. Evans +7 more
TL;DR: Gaussian equation curves are used to generate baseline curves against which a priori maternal age Down syndrome risks are adjusted to develop likelihood ratios for individual patients, and data suggest that normality of log transforms of alpha-fetoprotein and normalities of log transform of beta-human chorionic gonadotropin are reasonable models.
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Shunt-based interventions: Why, how, and when to place a shunt.
TL;DR: Benefits of fetoscopic or ultrasound-guided fetal intervention include decreased uterine irritability, decreased incidence of preterm labor, and avoidance of risks associated with hysterotomy and commitment to cesarean delivery for future pregnancies.