Rocky Mountain Medical Legal Consultation, Inc.

Wanda (Marley) Guidry, RN, BSN, CRNA, MS, PhD is owner of Rocky Mountain Medical Legal Consultation, Inc., located in Fort Collins, Colorado. She has 15 years of combined collegiate and professional education, all of which is relevant to her business as a forensic toxicologist and physiologist. She received training to be a Registered Nurse at Georgia Baptist Hospital School of Nursing in Atlanta, GA. After this three-year diploma program, she continued on to receive a Bachelorís degree in nursing at the University of South Alabama. A desire to increase her responsibilities led her to receive training in nurse anesthesia at the Mayo School of Health Related Sciences. This two-year labor-intensive program led to her successful completion of the National Certifying Exam to become a Certified Registered Nurse Anesthetist (CRNA). A Masters degree was later earned at Kansas University, through a two-year course involving on-site seminars and computer-enabled didactic studies. These studies, along with her thesis focused primarily on the pharmacology and toxicology of psychoactive drugs. She graduated summa cum laude with her PhD in physiology from Colorado State University, which required a seven-year program of didactics and intensive research.


Wanda began her professional career as a nurse in medical, surgical, and cardiac intensive care units. Emergency nursing in Mobile, Alabama provided a rich foundation of knowledge and experience in caring for patients under the acute and chronic effects of ethanol. Patients who had consumed illicit drugs embodied a large proportion of her experience. These drugs included heroin and other narcotics, phencyclidine (PCP), peyote (cactus), psilocybin (mushrooms), cocaine, crack cocaine, marijuana, lysergic acid diethylamine (LSD), methamphetamines, and anabolic steroids. After practicing as an RN in critical care areas for five years, Wanda trained at the Mayo Clinic in Rochester, MN to become a Certified Registered Nurse Anesthetist (CRNA). She continued to deliver anesthesia at Poudre Valley Hospital in Fort Collins for 12 years. This practice involved the hands-on administration of: volatile anesthetic gases, narcotics, benzodiazepines, barbiturates, and other central nervous system stimulants and depressants . Multiple other drugs were administered to thousands of patients, including: Ketamine, dopamine and serotonin agonists and antagonists, depolarizing and non-depolarizing muscle relaxants, pseudocholinesterase inhibitors, anticholinergics, drugs that modulate the autonomic nervous system (cardio-selective and vasoactive drugs; bronchodilators), drugs affecting gastric motility, glucocorticoids and non-steroidal anti-inflammatory drugs. In addition to the administration of appropriate drugs, her practice of nurse anesthesia involved the monitoring and maintenance of normal physiology.

This required a thorough and comprehensive understanding of all the organ systems and how they integrate together to maintain homeostasis. The administration of appropriate fluids, electrolytes, colloids, and blood products was also vital in the everyday delivery of anesthesia and good patient care. While practicing at PVH, Dr. Guidry completed a Masters degree in Nurse Anesthesia at Kansas University. Most of this two-year study involved an intensive study of pharmacology and toxicology. After working at PVH for 12 years, Dr. Guidry attended Colorado State University and completed a seven-year PhD in physiology. The didactic portion of her PhD focused on cardiovascular, renal, and pulmonary physiology and pathophysiology. Upon retirement from CSU, Dr. Guidry joined Rocky Mountain Instrumental Laboratory as a Senior Scientist. She worked there for nearly two years as a medical consultant and expert witness in criminal trials as a toxicologist and physiologist.

Dr. Guidry’s research thesis involved the transmission and bioavailability of the narcotic Fentanyl in breast milk of women who had received this narcotic intraoperatively. The results are published in Canadian Journal of Anaesthesia (1992). Her doctoral research focused on the cardiovascular and renal effects of angiotensinogen gene expression within the kidneys of Sprague Dawley rats. The results are important to humans because they express the same gene at the same intrarenal locus, and experience the same physiological effects in some cases of essential hypertension. The dissertation research is published in the Journal of American Society of Nephrology (1995) and Kidney and Blood Pressure Research (2000). Other publications involve physiology and pharmacology topics, which can be seen in her curriculum vita.


While working as a research associate, Dr. Guidry taught physiology to undergraduate students and pharmacology to Registered Nurses. For seven years after her doctoral degree was completed, Dr. Guidry continued at CSU as an assistant professor, teaching pharmacology, pulmonary, endocrine, renal, and cardiovascular physiology. Her students included undergraduates, graduates, and veterinary residents.


The extensive exposures to clinical experience, academic training, and teaching laid a broad and specific foundation for practicing toxicology. While at Rocky Mountain Instrumental Laboratory, Dr. Guidry used her knowledge and experience to consult with attorneys about the pharmacological and physiological effects of drugs and ethanol. She offered affidavits for diverse issues such as gastro-esophageal reflux disease (GERD), urinary creatinine concentrations for persons suspected of new or repeated drug use, THC and/or its metabolites in urine, the differentiation between illegal methamphetamine vs. legal methamphetamines and amphetamines, and custom draughts of affidavits. She has testified throughout Colorado at criminal trials as an expert witness, and has written scores of reports that have effected settlements without requiring court proceedings. This business is Dr. Guidry’s forte, representing the culmination of her life’s work. It is her passion and she is committed to maintaining the highest integrity in the pursuit of truth and justice.

A minimum of 20 hours of continuing education units (CEU) are attained every year. The source of these courses varies, with the emphasis being placed on physiology, pharmacology, chemistry, and pain management. Subscriptions to the following sources have provided the majority of Dr. Guidry’s continuing education, as an endeavor to remain current in the fields of forensic toxicology, pharmacology, and physiology.

  • Dannemiller Memorial Educational Foundation
    • Analgesia File Notebook
    • Nurse Anesthesia Files
  • Clinical Reviews for Nurse Anesthetists
  • Audio Digest Anesthesiology
  • American Society of Anesthesiologists
    • Refresher Courses in Anesthesiology
  • Multiple Hours of Independent Reading


  • 28.8 hours training course by Industrial Training and Design, LTD, Denver CO; Certification issued in accordance with the provisions of the United States Department of Transportation CFR 49 Part 40


  • American Association of Nurse Anesthetists
  • Colorado Board of Nursing
  • Colorado Advanced Practitioners
  • American Physiological Society
  • Society of Forensic Toxicologists


  • Continuing Legal Education
    • 2005 Lorman Education, Denver CO; Driving Under the Influence of Drugs
    • 2006 Rocky Mountain Instrumental Laboratory Seminar for Defense Attorneys, Denver CO; Toxicology Issues
    • 2008 Texas Criminal Defense Lawyer's Association, Mastering Scientific Evidence; Pharmacokinetics and Pharmacodynamics of Ethanol.

Contact Information:
Office: (970) 619-0729
Facsimile: (970) 689-3947

Qualifications Forensic Services Resume

About Rocky Mountain Medical Legal Consultation, Inc