As physical therapy students, much emphasis is placed on screening for Red Flags to help determine if a patient is appropriate for our services. Generally speaking, a Red Flag can be defined as a sign or symptom indicating the presence of a serious pathology. In a 2011 article, Davenport and Sebelski defined Red Flags as "abnormalities within the systems review...which may suggest the need for referral to another healthcare practitioner (Davenport 2011)." In this same article, these authors are quick to point out that Red Flags have a low predictive value for forms of pathology.
A list of Red Flags commonly seen in the clinic are as follows:
With the profession of physical therapy on the brink of direct access and autonomous care, our ability to correctly determine a patient's appropriateness for therapy is crucial. A recent post from the ForwardThinkingPT outlines a 2013 Cochrane Review regarding the effectiveness of using red flags to screen for malignancy in the low-back pain population. The review assessed 8 cohort studies that specifically addressed 11 Red Flags in the patient's subjective interviews and physical examinations.* Of these 8 studies, which looked at >6000 patients, the symptom of low back pain presented as a more serious pathology <1% of the time. The review found that Red Flags associated with low back pain have high false positive ratings and that the "indication of spinal malignancy should not be based on the results of one single red flag question (Henschke 2013)." Despite the overall low probability of Red Flags, a few studies did find a meaningful increase in probability if the patient had a previous history of cancer.
So where does this leave us as practitioners? It is important to consider that the Cochrane review only assessed the impact of 1 Red Flag in its relationship to increasing the chance of malignancy. In the clinic it is important to document Red Flags and use proper judgement if several of them are positive. Because of the high false positive occurrence, Davenport and Sebelski recommend utilizing a diagnostic process to help guide your clinical reasoning. This diagnostic process involves using a symptom based approach for diagnosis. With each patient you should ask yourself, "Among all possible health conditions, what is causing my patient's symptoms (Davenport 2011)?" Obviously this is a loaded question, but the question does stress the importance of having strong differential diagnosis skills. In conclusion, assessing for Red Flags can be a difficult process. Always remember to utilize good communication and practice forward-inductive reasoning to recognize patterns during your examinations.
*It should be noted that all 11 Red Flag questions were not indicated in every chart and a possible limitation to the study is inadequate therapist documentation.
Davenport & Sebelski. (2011). The Physical Therapist as a Diagnostician: How do we, Should we, and Could we use Information about Pathology in our Practice? Physical Therapy. 2011;91.11. Web. 3 April 2013.
Henschke N, Maher CG, Ostelo RWJG, de Vet HCW, Macaskill P, Irwig L. Red ﬂags to screen for malig-
nancy in patients with low-back pain. Cochrane Database of Systematic Reviews 2013, Issue 2. Art. No.: CD008686. DOI: 10.1002/14651858.CD008686.pub2. Web. 3 April 2013.
James Heafner PT, DPT, OCS:
Owner and lead physical therapist at Heafner Health, cash-based physical therapy in Boulder, CO. Areas of expertise include orthopedic and manual therapy, functional movement, pain science, and movement science.
In May 2013, I earned my Doctorate in Physical Therapy from Saint Louis University. After graduating from the Harris Health Systems Orthopedic Residency in October 2014, I moved to Boulder, CO. Since living in Boulder, I have started my own cash-based PT practice, earned my OCS certification, and teach for the OPTIM Fellowship and COMT program in Houston TX and Scottsdale, AZ.
Chris Fox PT, DPT, OCS: Physical therapist at Foothills Sports Medicine & Physical Therapy in Scottsdale, AZ and regularly lectures at the Phoenix Campus for NAU's DPT program and for Optim Manual Therapy's COMT program. Completed multiple advanced manual therapy courses implementing aspects of biomechanical analysis. He received his DPT from Saint Louis University in 2013. Completed Scottsdale Healthcare's Orthopaedic Residency (now Honor Health) in July 2014. He became a Board Certified Orthopaedic Specialist in 2015. Level I Expert in FMS and SFMA , Kinetacore FDN Level 1 certification, and IASTM Technique course completion. He would like to pursue further education in McKenzie Technique, Dry Needling, Strength & Conditioning, Orthopaedic and Manual Therapy.
Brian Schwabe PT, DPT, SCS, CSCS:
- Board Certified Sports Physical Therapist (SCS) at Elite OrthoSport in Santa Monica, CA which specializes in treating collegiate/professional athletes and clientele from the Beverly Hills, Hollywood, and Santa Monica areas.
- USC Sports Residency Trained Physical Therapist (<1% of all PT's residency trained)
- DPT from Saint Louis University
- Future plans/interest include:
1. USAW, SFMA & Catapult Systems technology for NBA teams
2. Pursuing a position as a sports physical therapist &/or Strength coach for a Division 1 athletic medicine department or professional sport team.
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