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Ruth E. Wachtel, Ph.D., M.B.A.
Associate Professor


Contact Information
Office Address: 6505-3 JCP
Phone Number: (319) 353-7681

Email Me

Education
Graduate Education
  • 1980, Ph.D., Duke University
  • 1999, M.B.A., University of St. Thomas
Research Interests
  • health care economics
Appointments
  • The University of Iowa College of Medicine 1988-present
Additional
Click here to access the Operations Research web site.
Publications
  1. Wachtel RE, Dexter F: Numerous studies have considered opportunity costs of operating time. Surgery 2009 Oct 26


  2. O'Neill L, Dexter F, Wachtel RE: Should anesthesia groups advocate funding of clinics and scheduling systems to increase operating room workload? Anesthesiology 2009 Oct 8


  3. Dexter F, Wachtel RE: Analysing day-of-surgery cancellation rates. Anaesth Intensive Care 2009 Sep 25


  4. Wachtel RE, Dexter F: Reducing tardiness from scheduled start times by making adjustments to the operating room schedule. Anesth Analg 2009 May 19


  5. Wachtel RE, Dexter F: Influence of the operating room schedule on tardiness from scheduled start times. Anesth Analg 2009 May 19


  6. Wachtel RE, Dexter F: Reducing surgical patient fasting times. AORN J 2009 May 9


  7. Wachtel RE, Dexter F, Dow AJ: Growth rates in pediatric diagnostic imaging and sedation. Anesth Analg 2009 Apr 18


  8. Dexter F, Birchansky L, Bernstein JM, Wachtel RE: Case scheduling preferences of one Surgeon's cataract surgery patients. Anesth Analg 2009 Jan 20


  9. Wachtel RE, Dexter F: Tactical increases in operating room block time for capacity planning should not be based on utilization. Anesth Analg 2008 Jan 1


  10. Dexter F, Xiao Y, Dow AJ, Strader MM, Ho D, Wachtel RE: Coordination of appointments for anesthesia care outside of operating rooms using an enterprise-wide scheduling system. Anesth Analg 2007 Nov 29


  11. Dexter F, Wachtel RE: Patient waiting time matters when filling a pod of operating rooms. Arch Surg 2007 Nov 21


  12. Dexter F, Wachtel RE, Epstein RH, McIntosh C, O'Neill L: Allocative efficiency vs technical efficiency in operating room management. Anaesthesia 2007 Nov 10


  13. Wachtel RE, Dexter F: A simple method for deciding when patients should be ready on the day of surgery without procedure-specific data. Anesth Analg 2007 Jun 21


  14. Wachtel RE, Dexter EU, Dexter F: Application of a similarity index to state discharge abstract data to identify opportunities for growth of surgical and anesthesia practices. Anesth Analg 2007 Apr 26


  15. Dexter F, Weih LS, Gustafson RK, Stegura LF, Oldenkamp MJ, Wachtel RE: Observational study of operating room times for knee and hip replacement surgery at nine U.S. community hospitals. Health Care Manag Sci 2006 Dec 26


  16. Dexter F, Wachtel RE, Epstein RH: Impact of average patient acuity on staffing of the phase I PACU. J Perianesth Nurs 2006 Oct 10


  17. Dexter F, Wachtel RE: Economic, educational, and policy perspectives on the preincision operating room period. Anesth Analg 2006 Sep 27


  18. Dexter F, Wachtel RE: Should evaluation of surgeons based on total hospital costs have considered operating room times? J Am Coll Surg 2006 Aug 26


  19. Wachtel RE, Dexter F, Lubarsky DA: Financial implications of a hospital's specialization in rare physiologically complex surgical procedures. Anesthesiology 2005 Jun 29


  20. Dexter F, Wachtel RE, Sohn MW, Ledolter J, Dexter EU, Macario A: Quantifying effect of a hospital's caseload for a surgical specialty on that of another hospital using multi-attribute market segments. Health Care Manag Sci 2005 Jun 15


  21. Dexter F, Ledolter J, Wachtel RE: Tactical decision making for selective expansion of operating room resources incorporating financial criteria and uncertainty in subspecialties' future workloads. Anesth Analg 2005 Apr 23


  22. Wachtel RE, Dexter F: Differentiating among hospitals performing physiologically complex operative procedures in the elderly. Anesthesiology 2004 May 29


  23. Dexter F, Wachtel RE, Yue JC: Use of discharge abstract databases to differentiate among pediatric hospitals based on operative procedures: surgery in infants and young children in the state of Iowa. Anesthesiology 2003 Jul 29


  24. Miura H, Wachtel RE, Loberiza FR Jr, Saito T, Miura M, Nicolosi AC, Gutterman DD: Diabetes mellitus impairs vasodilation to hypoxia in human coronary arterioles: reduced activity of ATP-sensitive potassium channels. Circ Res 2003 Feb 7; 92(2):151-8


  25. Miura H, Wachtel RE, Liu Y, Loberiza FR Jr, Saito T, Miura M, Gutterman DD: Flow-induced dilation of human coronary arterioles: important role of Ca(2+)-activated K(+) channels. Circulation 2001 Apr 17; 103(15):1992-8


  26. Su X, Wachtel RE, Gebhart GF: Mechanosensitive potassium channels in rat colon sensory neurons. J Neurophysiol 2000 Aug; 84(2):836-43


  27. Su X, Wachtel RE, Gebhart GF: Capsaicin sensitivity and voltage-gated sodium currents in colon sensory neurons from rat dorsal root ganglia. Am J Physiol 1999 Dec; 277(6 Pt 1):G1180-8


  28. Wachtel RE: Capsaicin. Reg Anesth Pain Med 1999 Aug 13


  29. Johnson RF, Beltz TG, Jurzak M, Wachtel RE, Johnson AK: Characterization of ionic currents of cells of the subfornical organ that project to the supraoptic nuclei. Brain Res 1999 Jan 30; 817(1-2):226-31


  30. Su X, Wachtel RE, Gebhart GF: Inhibition of calcium currents in rat colon sensory neurons by K- but not mu- or delta-opioids. J Neurophysiol 1998 Dec; 80(6):3112-9


  31. Kraske S, Cunningham JT, Hajduczok G, Chapleau MW, Abboud FM, Wachtel RE: Mechanosensitive ion channels in putative aortic baroreceptor neurons. Am J Physiol 1998 Oct; 275(4 Pt 2):H1497-501


  32. Sullivan MJ, Sharma RV, Wachtel RE, Chapleau MW, Waite LJ, Bhalla RC, Abboud FM: Non-voltage-gated Ca2+ influx through mechanosensitive ion channels in aortic baroreceptor neurons. Circ Res 1997 Jun; 80(6):861-7


  33. Cunningham JT, Wachtel RE, Abboud FM: Mechanical stimulation of neurites generates an inward current in putative aortic baroreceptor neurons in vitro. Brain Res 1997 May 16; 757(1):149-54


  34. Wachtel RE: Relative potencies of volatile anesthetics in altering the kinetics of ion channels in BC3H1 cells. J Pharmacol Exp Ther 1995 Sep; 274(3):1355-61


  35. Chapleau MW, Cunningham JT, Sullivan MJ, Wachtel RE, Abboud FM: Structural versus functional modulation of the arterial baroreflex. Hypertension 1995 Aug; 26(2):341-7


  36. Cunningham JT, Wachtel RE, Abboud FM: Mechanosensitive currents in putative aortic baroreceptor neurons in vitro. J Neurophysiol 1995 May; 73(5):2094-8


  37. Wachtel RE, Kraske SA, Yorek MA: Sodium channels in cultured neuroblastoma cells grown in high glucose or L-fucose. J Membr Biol 1995 May; 145(2):187-92


  38. Sharma RV, Chapleau MW, Hajduczok G, Wachtel RE, Waite LJ, Bhalla RC, Abboud FM: Mechanical stimulation increases intracellular calcium concentration in nodose sensory neurons. Neuroscience 1995 May; 66(2):433-41


  39. Chapleau MW, Hajduczok G, Sharma RV, Wachtel RE, Cunningham JT, Sullivan MJ, Abboud FM: Mechanisms of baroreceptor activation. Clin Exp Hypertens 1995 Jan-Feb; 17(1-2):1-13


  40. Yorek MA, Stefani MR, Wachtel RE: Elevated levels of glucose and L-fucose reduce 22Na+ uptake and whole cell Na+ current in cultured neuroblastoma cells. J Neurochem 1994 Jan; 62(1):63-9


  41. Wachtel RE: Physostigmine block of ion channels activated by acetylcholine in BC3H1 cells. Mol Pharmacol 1993 Nov; 44(5):1051-5


  42. Wachtel RE, Wegrzynowicz ES: Kinetics of nicotinic acetylcholine ion channels in the presence of intravenous anaesthetics and induction agents. Br J Pharmacol 1992 Jul; 106(3):623-7


  43. Wegrzynowicz ES, Jensen NF, Pearson KS, Wachtel RE, Scamman FL: Airway fire during jet ventilation for laser excision of vocal cord papillomata. Anesthesiology 1992 Mar; 76(3):468-9


  44. Lebeda MD, Wegrzynowicz ES, Wachtel RE: Propofol potentiates both pre- and postsynaptic effects of vecuronium in the rat hemidiaphragm. Br J Anaesth 1992 Mar; 68(3):282-5


  45. Wegrzynowicz ES, Pearson KS, Wachtel RE: Sympathetic blockade enhances blood flow prior to hyperbaric oxygen therapy. Journal of Hyperbaric Medicine


  46. Wachtel RE, Wegrzynowicz ES: Mechanism of volatile anesthetic action on ion channels. Ann N Y Acad Sci 1991; 625():116-28


  47. Wachtel RE: Comparison of anticholinesterases and their effects on acetylcholine-activated ion channels. Anesthesiology 1990 Mar; 72(3):496-503


  48. Wachtel RE: Use of BMDP statistical package to generate maximum liklihood estimates for single channel data. J Neurosci Methods 1988 Sep 1


  49. Wachtel RE: Ketamine decreases the open time of single-channel currents activated by acetylcholine. Anesthesiology 1988 Apr; 68(4):563-70


  50. Wachtel RE: Effects of diltiazem and verapamil on responses to acetylcholine. Br J Pharmacol 1987 Nov 1


  51. Wachtel RE: Personal bibliographic databases. Science


  52. Wachtel RE: Aliphatic alcohols increase the decay rate of glutamate-activated currents at the crayfish neuromuscular junction. Br J Pharmacol 1984 Oct; 83(2):393-7


  53. Wachtel RE: Effects of some depressant drugs on synaptic responses to glutamate at the crayfish neuromuscular junction. Br J Pharmacol 1984 Oct; 83(2):387-91


  54. Gage PW, Wachtel RE: Some effects of procaine at the toad end-plate are not consistent with a simple channel-blocking model. J Physiol 1984 Jan; 346():331-9


  55. Wachtel RE, Wilson WA Jr: Barbiturate effects on acetylcholine-activated channels in Aplysia neurons. Mol Pharmacol 1983 Nov; 24(3):449-57


  56. Gage PW, Hamill OP, Wachtel RE: Sites of action of procaine at the motor end-plate. J Physiol 1983 Feb; 335():123-37


  57. Wachtel RE, Wilson WA Jr: Use of the single electrode voltage clamp to perform noise and relaxation studies of acetylcholine-activated channels in Aplysia neurons. J Neurosci Methods 1981 Jun; 4(1):87-103


  58. Wachtel RE, Tsuji K: Comparison of limulus amebocyte lysates and correlation with the United States Pharmacopeial pyrogen test. Appl Environ Microbiol 1977 Jun; 33(6):1265-9
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