Related Experiment Video
Updated: Jan 25, 2026
05:39
Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus
Published on: May 16, 2025
592
[Tracheal stenosis revealing systemic lupus erythematosus]
Safae Elidrissi1, Hind Serhane1, Salma Aitbatahar1
1Service de Pneumologie, Labo PCIM, UCA, Marrakech, Maroc.
The Pan African Medical Journal
|May 1, 2019
Summary
Systemic lupus erythematosus (SLE) can affect the respiratory system, though tracheal stenosis is rare. This case highlights SLE presenting unusually with tracheal stenosis and dry eye-buccal syndrome.
Area of Science:
- Rheumatology
- Pulmonology
- Otorhinolaryngology
Background:
- Systemic lupus erythematosus (SLE) commonly affects skin, joints, and kidneys.
- Respiratory involvement in SLE, particularly pleural disease, is known but variable.
- Tracheal stenosis is an exceptionally rare manifestation of SLE.
Related Concept Videos
01:22Mitral Stenosis I: Introduction
551
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
551
01:18Second Order systems II
396
In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.
396
01:21First Order Systems
412
First-order systems, such as RC circuits, are foundational in understanding dynamic systems due to their straightforward input-output relationship. Analyzing their responses to different input functions under zero initial conditions reveals significant insights into system behavior.
When a first-order system is subjected to a unit-step input, its response is characterized by its transfer function. By applying the Laplace transform of the unit-step input to the transfer function, expanding the...
When a first-order system is subjected to a unit-step input, its response is characterized by its transfer function. By applying the Laplace transform of the unit-step input to the transfer function, expanding the...
412
01:20Second Order systems I
581
A servo system exemplifies a second-order system, featuring a proportional controller and load elements that ensure the output position aligns with the input position. The relationship between these components is described by a second-order differential equation. Applying the Laplace transform under zero initial conditions yields the transfer function, showing how inputs are converted to outputs in the system.
By reinterpreting the system, one can derive the closed-loop transfer function, which...
By reinterpreting the system, one can derive the closed-loop transfer function, which...
581
01:26Mitral Stenosis III: Medical Management
269
Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
269
01:27Mitral Stenosis IV: Nursing Management
267
A comprehensive nursing assessment is essential for patients with valvular heart disease, which involves any dysfunction of the heart valves that could impact blood flow and overall heart function.Subjective Data Collection:Chief Complaint and Present Illness: Start with the patient's primary concerns, focusing on the onset, duration, and progression of cardiac symptoms such as dyspnea, fatigue, chest pain, and palpitations.Past Medical History: Collect detailed information on any previous...
267