Expert Details

Expert in Blood Wetted Devices and Biomaterials

Expert ID: 108029 New York, USA

Request Expert

BLOOD-WETTED BIOMATERIAL; CARDIOVASCULAR PROSTHESES; ARTIFICIAL INTERNAL ORGANS. Expert has been involved in the design, development, and evaluation of extracorporeal and implantable artificial internal organs for many years, first with the artificial kidney (including hemodialyzers and those based upon selective absorption) and subsequently with many other membrane devices including artificial lungs (blood-gas exchangers), stents, and vascular prostheses. His expertise with respect to these devices involves fluid mechanics, transport phenomena, biocompatibility, and experimental approaches to evaluation. Most recently he has worked with specialized devices for separation of plasma and cells and also with devices to facilitate cellular immunotherapy. He has also developed technologies for separating rare cells (e.g. 1:100,000) from large cell populations.

Expert is familiar with related technologies and scientific areas, particularly from a quantitative and modeling perspective. His technical expertise includes methods for extracorporeal blood access, selection of biomaterials, control of thrombogenesis, and monitoring of equipment performance. His scientific areas include hemorheology, transport phenomena in blood, both homogeneous and heterogeneous reactions in blood (especially those related to cellular adhesion and thrombogenesis), and immunophysical phenomena, especially the interactions of T and B lymphocytes.

PROSTHETIC MATERIAL; BLOOD-COMPATIBLE MATERIAL. Expert has many years of involvement with the evaluation of hemocompatibility of biomaterials, the effects of shear on hemolysis, and other manifestations of cell damage by prosthetic devices. In addition, he also advises the Red Cross and other organizations concerning the processing of blood and other blood products, including blood filtration and the elimination of infectious vectors in transfusible products, especially via photochemical reactions.

GENETIC ENGINEERING. Expert is familiar with quantitative modeling of recombinant and fused cells, downstream processing of hybridoma and recombinant products, especially immunochemical methodolgies. He is involved in the isolation of specific cell types (e.g. fetal cells in the maternal circulation) for diagnostic purposes. He is coordinating a new program in "genomic engineering" at Columbia University.


Expert has expertise in sorption phenomena, which includes the use of materials in vivo and in vitro to remove toxins or rebalance the composition of biological media. He can assist with evaluation of sorption capacity and specificity, biocompatibility, modification of sorbents with membranous coatings, and design of physical containers to control flow, pressure changes, thrombosis, and to minimize mass transfer resistances external to the sorbent. His experience includes both the use of biospecific and generic ligands.

Expert has extensive experience in the engineering, design, and development of blood-wetted devices including conduits (catheters, cannulae, vascular prostheses), implants (recently, in particular, stents), and active devices, especially those involved in the extraction from or release of materials into blood. His experience includes early, laboratory development and in vitro experiments, animal evaluations, and participation in design and evaluation of clinical trials.

Expert's principal experience (please also see his paragraph on "biological engineering") is with blood-wetted devices, both in vivo and ex vivo. His experience includes design, regulatory issues, some aspects of manufacture (including sterilization), and evaluation of experimental results from in vitro, animal, and clinical trials.

Expert has experience in ethylene oxide sterilization which is particularly related to evaluation of ethylene oxide removal after sterilization. He has familiarity with immunological issues associated with inadequate removal of ethylene oxide.

Expert has familiarity with gas transport in blood-gas exchangers, both carbon dioxide and oxygen. He has a strong technical background in mass transfer in blood and through both semipermeable and microporous membranes. He is familiar with oxygenator acoutrements: filters, reservoirs, cannuale, and aspirators. He is able to advise on biomaterial issues. He has conducted research on the deterioration of membrane performance during use due to water intrusion into membrane pores. He has also analyzed flow and shear rate distribution in commercial gas exchangers.

Expert regularly teaches mathematical approaches to predicting and analyzing both spatial and temporal distributions of materials in organisms, organs, and other tissues. He is familar with various controlled-release technologies and tests that establish their efficacy. He is especially strong in relating basic material properties of releasing implants to their performance.

Expert is familiar with both chemically- and biochemically- (immunospecific and other) based sorptive phenomena that either accidentally or intentionally alter the composition of biological fluids. He has extensive experience with spatial and temporal distributions of protein absorption (including the 'Vroman effect') and evaluations of the importance of these phenomena in blood-wetted devices. He has substantial research experience in interaction of cells (especially T lymphocytes) with biological molecules adsorbed on synthetic substrates and artificial lipid layers. (Please also see Expert's pargraph on "absorption.")

Expert has worked with numerous artificial materials exposed to blood. He is familar with (and critical of) in vitro methods for evaluating thromboresistance. He notes that he is not an advocate of a particular type of thromboresistant material. He can evaluate the effects of flow, geometry, and anastomoses on thromboresistance of implants.

Expert notes that his experience is limited to cardiovascular implants, and particularly to issues associated with flow and geometry that define the graft environment, and issues of diffusion into and out of the graft. He is capable of participating the the evaluation of grafts that carry transfected genes, either to alter their performance or to have a systemic effect, although his expertise falls far short of dealing with all issues that these systems raise.

Expert has life-long experience in evaluating the convective and diffusive transport of molecules in biological systems. He is currently writing a textbook for biomedical engineers titled, "Transport and Rate Phenomena in Biological Systems". He is experienced in evaluating transport problems at the organismic, organ, and cellular level.

Expert may consult nationally and internationally, and is also local to the following cities: New York, New York - Yonkers, New York - Newark, New Jersey - Jersey City, New Jersey - Paterson, New Jersey - Elizabeth, New Jersey - Bridgeport, Connecticut - New Haven, Connecticut - Hartford, Connecticut - Philadelphia, Pennsylvania

Request Expert

Education

Year Degree Subject Institution
Year: 1960 Degree: PhD Subject: Chemical Engineering Institution: University of Pennsylvania
Year: 1955 Degree: MS Subject: Chemical Engineering Institution: University of Pennsylvania
Year: 1953 Degree: BS Subject: Chemical Engineering Institution: M.I.T.

Work History

Years Employer Title Department Responsibilities
Years: 1958 to 2000 Employer: Columbia University Title: Please see "Responsibilities" field Department: Chemical Engineering; Artificial Organs Research Laboratory Responsibilities: Professor, Chemical Engineering (from 1968); Director, Artificial Organs Research Laboratory (from 1968)

Career Accomplishments

Associations / Societies
Expert is a Fellow of the AIChE, Fellow of the New York Academy of Medicine, Fellow of the American Institute of Medical and Biological Engineering, and member and past President of ASAIO.
Professional Appointments
He is a reviewer of professional journals and of grant applications for federal and state agencies, including NIH, NSF, and the New York State Science and Technology Foundation.
Publications and Patents Summary
He is author or co-author of over 120 journal or conference publications. He is the co-editor of two New York Academy of Sciences Annals dealing with blood-surface interactions.

Additional Experience

Training / Seminars
Expert is Founder of the Columbia University Seminar on Biomaterials (1967). He has been a lecturer for more than 20 years at New York's Mount Sinai School of Medicine.
Other Relevant Experience
He is a consultant to St. Luke's-Roosevelt Hospital Center.

Language Skills

Language Proficiency
French Expert speaks, reads, and writes some French, Danish, and German, though he does not consider himself thoroughly fluent in any of the languages.
Danish Expert speaks, reads, and writes some French, Danish, and German, though he does not consider himself thoroughly fluent in any of the languages.
German Expert speaks, reads, and writes some French, Danish, and German, though he does not consider himself thoroughly fluent in any of the languages.

Fields of Expertise

Request Expert

Dev Tool:

Request: expert/blood-wetted-devices-and-biomaterials
Matched Rewrite Rule: expert/([^/]+)(?:/([0-9]+))?/?$
Matched Rewrite Query: experts=blood-wetted-devices-and-biomaterials&page=
Loaded Template: single-experts.php