Ontology Selection for 5 Clinical Factors




·      Ischemic Heart Disease Evaluation - Ischemic heart disease is essentially a buildup of plaque narrowing the heart arteries and can cause an multitude of issues for the patients. There are multiple clinical factors to consider when evaluating patients pre-treatment and post-treatment. In an evaluation of childhood cancer survivors found that the likelihood of adult stage Ischemic Heart Disease occurred at a higher rate due to early exposures to platinum agents, alkylator and radiotherapy (Chow et al., 2018). Moreover, additional lifestyle habits and genetic factors alos play a critical role in detecting ischemic heart disease in patients preparing for radiotherapy. Some precursors to consider are age, smoking status, systolic blood pressure, serum cholesterol, and family history according to the Reynolds Risk Score (as cited in Taylor & Darby, 2014).

·      Cardiovascular Risk Assessment Before Radiation (Chest, Head/ Neck etc.) - Cardiovascular Risk Assessment is a fundamental mechanism used to prevent the outcome of cardiovascular disease (CVD). The primary underlying risk factors that helps to identify patients who may suffer CVD in the future includes age, sex, high low density lipoprotein (LDL)  low high-density lipoprotein (HDL), high blood pressure, diabetes mellitus, tobacco usage, and family history. These are common factors for at risk patients. Moreover, according to more comprehensive sets of data markers combined by multiple groups. Additional factors have become evident which include gender, ethnicity, and BMI (Petcher & Moran, 2017).

·      Cardiovascular Risk Assessment Before Stem Cell Transplant - Common risk factors are similar to that previously mentioned which include age, sex, LDL & HDL levels, family history and tobacco usage. However, in a study focused on patients who underwent hematopoietic stem cell transplantation BMI and nutritional status posed the highest risk for potential cardiovascular disease post treatment (Morais et al., 2018). This risk factor is common across the board to increase the risk of cardiovascular disease. Obesity is a concern in raising the potential for an plethora of health concerns, but is more prevalent in increased risk of cancers and heart disease. 

·      Congestive Heart Failure/Cardiomyopathy Evaluation - Current clinical factors to consider are determined by type of cancer therapy being provided. In patients who are undergoing treatment of one of the following which include: anthracyclines, trastuzumab, cyclophosphamide, taxanes, 5-fluorouracil and interferons are at the highest risk for cardiotoxicity. With this being the major cause of future cardiac problems these patients may undergo preliminary tests such as echocardiogram pre-therapy and post-therapy to determine a baseline and be subject to surveillance. The more common factor similar to other referral sources are a family history, and current health conditions that serve as the best predetermination in assessing the overall health risk of a patient (Hamo et al., 2016).

·      Cardiovascular Risk Assessment before Chemotherapy, Targeted Therapy, Immunotherapy - For the advancement of cardio-oncology in assessing patients pre-treatment a more thorough assessment is required. This would include echocardiogram, certain examination to test blood levels, family history review, and current lifestyle. The general precursor to cardiac issues again is a general list of precursors that are applied across the board including age, sex, family history, and lifestyle habits (Hermann, 2014).

·      Key Clinical Factors as a Precursor to Identify High Risk Patients who may Benefit from Cardio-Oncology Intervention Include:

o   Weight
o   Tobacco Usage
o   Family History of Cardiac Problems
o   Age… (40 and Older at higher risk)
o   Diet
o   Current Medical Conditions
o   Treatment Options Specifically Radiation therapy, anthracyclines, trastuzumab, cyclophosphamide, taxanes, 5-fluorouracil and interferons.

2.     Identifying Risk Factors
Referral Sources
Ontology/Vocabulary
Code
Definitions
Ischemic Heart Disease Evaluation
 SNOMED-CT
·       414916001
·       238131007
·       365981007
·       297242006
·       308068007
·       Obesity (disorder)
·       Overweight (finding)
·       Finding of tobacco smoking behavior (finding)
·       Family history of ischemic heart disease (situation)
·       History of treatment for ischemic heart disease (situation)
Cardiovascular Risk Assessment Before Radiation (Chest, Head/ Neck etc.)
 SNOMED-CT
·       414916001
·       238131007
·       365981007
·       439724007
·       438825005
·       Obesity (disorder)
·       Overweight (finding)
·       Finding of tobacco smoking behavior (finding)
·       Family history of cardiovascular disease in first degree male relative less than 55 years of age (situation)
·       Family history of cardiovascular disease in first degree female relative less than 65 years of age (situation)
Cardiovascular Risk Assessment Before Stem Cell Transplant
 SNOMED-CT
·       414916001
·       238131007
·       365981007
·       439724007
·       438825005
·       Obesity (disorder)
·       Overweight (finding)
·       Finding of tobacco smoking behavior (finding)
·       Family history of cardiovascular disease in first degree male relative less than 55 years of age (situation)
·       Family history of cardiovascular disease in first degree female relative less than 65 years of age (situation)
Congestive Heart Failure/Cardiomyopathy Evaluation
 SNOMED-CT
·       414916001
·       238131007
·       365981007
·       433305001
·       Obesity (disorder)
·       Overweight (finding)
·       Finding of tobacco smoking behavior (finding)
·       Family history of congestive heart failure (situation)
Cardiovascular Risk Assessment before Chemotherapy, Targeted Therapy, Immunotherapy
 SNOMED-CT
·       414916001
·       238131007
·       365981007
·       110483000
·       85931000119105
·       Obesity (disorder)
·       Overweight (finding)
·       Finding of tobacco smoking behavior (finding)
·       Tobacco user (finding)
·       History of tobacco use in remission less than 12 months (situation)
Reason/Justification for Ontology and Code Selection
The ontology chosen for this section is SNOMED-CT. The selection of this ontology was primarily due to it being a domain ontology. The codes provided are all parent codes with child code associations. This would allow for more seamless extractions of identifiers across multiple systems depending if the disparate systems have the ontologies mapped appropriately to capture associations between the different codes. The codes I selected and reason for multiple use is due to my findings. Based on the clinical criteria for most cardiac issues the precursors do not vary. For the most part precursors for identifying at risk patients are the weight, tobacco usage, family history, age, diet, and treatment plan.

3.     Flow Chart
a.     Flow chart is an interface between two disparate databases using SNOMED CT as the common domain ontology and mapping the two to receive required information to identify clinical factors.


b.     Flow chart represents a  input into the referring physician HER database and identifies a an extraction from the HER assuming the HER is internal and placing into the attending physicians her to reflect in the patient history. If the defined code is not identified, then the code is rejected. 



4.     Use Cases









References

Chow, E. J., Chen, Y., Hudson, M. M., Feijen, E., Kremer, L. C., Border, W. L., … Yasui, Y. (2018). Prediction of Ischemic Heart Disease and Stroke in Survivors of Childhood Cancer. Journal of clinical oncology : official journal of the American Society of Clinical Oncology36(1), 44–52. doi:10.1200/JCO.2017.74.8673

Hamo, C. E., Bloom, M. W., Cardinale, D., Ky, B., Nohria, A., Baer, L., … Butler, J. (2016). Cancer Therapy-Related Cardiac Dysfunction and Heart Failure: Part 2: Prevention, Treatment, Guidelines, and Future Directions. Circulation. Heart failure9(2), e002843. doi:10.1161/CIRCHEARTFAILURE.115.002843

Herrmann, J., Lerman, A., Sandhu, N. P., Villarraga, H. R., Mulvagh, S. L., & Kohli, M. (2014). Evaluation and management of patients with heart disease and cancer: cardio-oncology. Mayo Clinic proceedings89(9), 1287–1306. doi:10.1016/j.mayocp.2014.05.013

Pletcher, M.J., & Moran, A.E. (2017). Cardiovascular Risk Assessment. Medical Clinics of North America, 101(4), 673-688. Retreived from https://www-clinicalkey-com.proxy.cc.uic.edu/service/content/pdf/watermarked/1-s2.0-S0025712517300251.pdf?locale=en_US&searchIndex=

Taylor, C., & Darby,  S.C.(2014) Ischemic Heart Disease and Breast Cancer Radiotherapy. JAMA Intern Med, 174(1), 160-161. doi:10.1001/jamainternmed.2013.9131

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