Related Experiment Video
Updated: Feb 4, 2026

05:39
Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus
Published on: May 16, 2025
665
Systemic Lupus Erythematosus Presenting with Alveolar Hemorrhage
Omar Tolaymat1, Florentina Berianu1
1Mayo Clinic Florida, Department of Rheumatology, 4500 San Pablo Road, Jacksonville, FL 32224, USA.
Case Reports in Rheumatology
|October 12, 2018
Summary
Diffuse alveolar hemorrhage (DAH) is a rare but serious manifestation of systemic lupus erythematosus (SLE). Prompt diagnosis and treatment of lupus-induced DAH are crucial for improving patient outcomes and reducing mortality.
Area of Science:
- Rheumatology
- Pulmonology
- Internal Medicine
Background:
- Diffuse alveolar hemorrhage (DAH) is an uncommon but critical presentation of systemic lupus erythematosus (SLE).
- Early recognition and intervention are vital for improving patient prognosis in SLE-related DAH.
Related Concept Videos
Alveoli and Alveolar Ducts
5.8K
The respiratory zone of the human body, which stands in contrast to the conducting zone, comprises the structures that actively participate in the exchange of gases. The initiation of this zone is marked by the terminal bronchioles converging into respiratory bronchioles, the tiniest bronchiole classification. The respiratory bronchioles give way to the alveolar ducts that opens into a congregation of alveoli. Actively involved in gas exchange, alveoli resemble tiny sacs similar to clusters of...
5.8K
Second Order systems II
408
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.
408
First Order Systems
429
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...
429
Second Order systems I
598
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...
598
Thermodynamic Systems
8.0K
A thermodynamic system is a set of objects whose thermodynamic properties are of interest. The system is considered to be embedded in its surroundings or the environment. The system and its environment can exchange heat and do work on each other through a boundary that separates them. However, the immediate surroundings of the system interact with it directly and therefore have a much stronger influence on its behavior and properties.
Consider an example of tea boiling in a kettle. The...
Consider an example of tea boiling in a kettle. The...
8.0K
Classification of Systems-I
592
Linearity is a system property characterized by a direct input-output relationship, combining homogeneity and additivity.
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
592

