Clinical Reasoning Foundations
Module 2: The Subjective Interview: SINSS
Module progress
Module Introduction
A patient arrives with symptoms, a history, and activities that have become difficult. Your task is to organize that information so the examination has a purpose. In this module, you will use SINSS to distinguish the effect on function, the response to stress, the nature of the presentation, the stage of the condition, and its direction over time.
James's teaching links these observations to clinical reasoning. You are not collecting five labels simply to complete a form. You are building an explanation that can guide what you examine, what you need to clarify, and how you judge change. The same patient may be unable to perform an important task while showing relatively little tissue irritability. The distinctions matter.
Learning Objectives
- Explain the five SINSS dimensions in your own words.
- Classify the functional severity of a named activity using James's framework.
- Distinguish functional severity from tissue irritability.
- Separate the injury timeline from the current clinical presentation.
- Describe progression, regression, an unchanged course, or an unclear pattern using supporting observations.
- Identify missing information instead of filling it with assumptions.
How to use this module: Read each lesson, view the linked source segment if helpful, answer the practice question before revealing its explanation, and finish with the worksheet and quiz. The worksheet is an original Bluewater learning activity based on these lessons.
Lesson 2.1 of 6
Start with the Activity: Understanding Severity
Objective
Explain SINSS and classify functional severity for a specific activity.
SINSS stands for severity, irritability, nature, stage, and stability. James introduces it as a way to organize information about the patient's problem and its behavior. Begin with what the patient is finding difficult. Walking, climbing stairs, and standing on one foot to dress are separate activities; they need not have the same degree of limitation.
In this framework, severity describes the effect on function. James also uses "subject reactivity" for this concept. The key question is what happens when the person tries to perform the activity. A general report that the ankle hurts does not tell you whether the person can walk normally, must modify walking, or cannot walk because of the symptoms.
James describes three levels:
The person cannot perform the activity because of the symptoms.
The person can perform it but experiences pain or needs to modify how it is performed.
The person performs it as expected, without modification or pain that changes performance. This does not necessarily mean no discomfort exists.
The useful record includes both the activity and the reason for your classification. "High severity for stair ascent: unable to reach the upstairs office" communicates more than "high severity." It also gives you a meaningful activity to revisit when assessing progress or discussing a functional goal.
In the recording, a sales representative cannot climb the stairs to the second-floor office; James classifies this as high severity. He also describes a soccer player who has resumed running without pain and classifies that activity as low severity. These are examples of function being used to organize the report, rather than assigning the entire person a single global severity label.
Source Video
Open Source Video · links to the original recorded instruction at the supplied timestamp.
Practice Question
The sales representative cannot climb the stairs to the office. Which detail supports the classification?
Takeaway
Name the activity, describe what happens, then classify it. Do not assume all activities have the same severity.
Module Close
SINSS gives you five ways to organize the presentation. The strength of your record depends on the observations behind each entry. Complete the practice worksheet, then attempt the quiz without consulting the answers. Revisit a source-linked explanation whenever your answer relied on an assumption. The next planned module connects these observations to tissue-specific impairment and functional goals.