Want to test your pathology knowledge before the CSFA exam? Below are free sample flashcards from the 50-card pathology section of our 1050-card CSFA (Certified Surgical First Assistant) deck, which covers SSI, MAP, Mean Arterial Pressure and more.
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During the initial inflammatory phase of wound healing, which cellular mediator is primarily responsible for debridement of bacteria and necrotic tissue between 24-48 hours post-injury?
Show answer →Neutrophils (Polymorphonuclear leukocytes) are the first responders, peaking at 24-48 hours. They utilize phagocytosis and release reactive oxygen species (ROS) and proteases to decontaminate the wound. CSFA Exam Strategy: NBSTSA often tests the timeline of cell arrival. While neutrophils arrive first, Macrophages (arriving at 48-72 hours) are essential for transitioning the wound to the proliferative phase. If the question asks for the essential cell for healing, the answer is usually macrophages. If it asks for the first or acute debridement cell, it is neutrophils.
A patient undergoing a total hip arthroplasty has a preoperative HbA1c of 8.2%. What is the primary pathophysiological mechanism by which this elevation increases the risk of surgical site infection (SSI)?
Show answer →Hyperglycemia (HbA1c >7.0-8.0%) impairs leukocyte function, specifically inhibiting neutrophil chemotaxis, adherence, and phagocytosis (the respiratory burst). It also causes non-enzymatic glycosylation of the basement membrane, leading to microvascular changes that decrease tissue perfusion. **Exam Strategy:** NBSTSA emphasizes that glycemic control is more critical than a history of diabetes alone. Distractors often include increased sugar for bacteria to eat, but the clinical focus is on impaired immune response and microvascular ischemia. Key threshold: HbA1c >8% is frequently cited as a significant cutoff for elective orthopedic delay.
During the initial inflammatory phase of wound healing (0-3 days), which cell type is the first to arrive at the surgical site to initiate debridement and phagocytosis?
Show answer →Neutrophils (Polymorphonuclear leukocytes) are the first responders, arriving within 24-48 hours via chemotaxis. They perform phagocytosis of bacteria and debris. NBSTSA Tip: While neutrophils arrive first, Macrophages are considered the orchestrators of healing, appearing around day 3-4 to transition the wound into the proliferative phase by releasing growth factors and cytokines. Distractor: Fibroblasts (these arrive later in the proliferative phase, around day 5-7).
A patient undergoing major abdominal surgery experiences sudden massive hemorrhage. What is the immediate physiological response triggered by baroreceptors in the aortic arch and carotid sinus to maintain Mean Arterial Pressure (MAP)?
Show answer →The initial response is the activation of the sympathetic nervous system (SNS). Baroreceptors detect a drop in MAP, leading to increased catecholamine release (epinephrine/norepinephrine). This results in: 1) Peripheral vasoconstriction (increased SVR) to shunt blood to vital organs. 2) Positive inotropy and chronotropy to increase CO. 3) Activation of the RAAS to promote fluid retention. CSFA Tip: NBSTSA often tests the compensatory stage where Heart Rate increases before Blood Pressure significantly drops.
In the TNM staging system, what specific clinical parameter does the N category evaluate, and how does Nx differ from N0?
Show answer →The N stands for regional lymph nodes. N0 indicates no regional lymph node metastasis. Nx means regional lymph nodes cannot be assessed (e.g., not removed or previously removed). CSFA Tip: NBSTSA often tests the difference between cannot be assessed (X) and none found (0). Accurate nodal staging is critical for determining the extent of surgical resection and the need for adjuvant therapy.
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Try 30 free CSFA cards firstThe full CSFA deck contains 1050 flashcards, and 50 of them focus on pathology. This page shows 5 free samples.
Our CSFA deck dedicates 50 of 1050 cards (5%) to pathology — always cross-check the official NBSTSA exam outline for the current blueprint weighting.
Yes — the samples on this page are free, and the CSFA preview page has 30 more free cards. Full access to all 1050 cards is a one-time $7.
Anatomy
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Basics
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Legal
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Management
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Pharmacology
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Physiology
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Procedures
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