The artery that supplies blood to the diaphragm is called?

AIIMS Raipur NO - 2017 (Shift-1)

Applied Anatomy

Easy

Appeared in: AIIMS Raipur NO - 2017 (Shift-1)

Explanation

The inferior phrenic arteries are the principal vessels that supply blood to the diaphragm.
As shown in the image, they typically arise as the first paired branches from the abdominal aorta, just below the diaphragm.
They ascend to supply the inferior or abdominal surface of the diaphragm, which is responsible for the majority of its muscular contraction during inspiration.

Option A: The inferior mesenteric artery supplies the hindgut, which includes the distal one-third of the transverse colon, the descending colon, the sigmoid colon, and the upper part of the rectum.
Option B: The suprarenal arteries (superior, middle, and inferior) are responsible for supplying the adrenal (suprarenal) glands, which are endocrine glands located on top of the kidneys.
Option D: The coeliac trunk is a major, short artery that branches from the abdominal aorta and divides to supply the foregut structures, including the stomach, liver, spleen, and parts of the pancreas and duodenum.

Visual 1: Diagram: A labeled illustration of the abdominal aorta and its major branches, highlighting the inferior phrenic arteries and the diaphragm. This helps to visually reinforce the anatomical relationships.
Visual 2: Flowchart: A chart showing the main branches of the abdominal aorta (celiac, SMA, IMA, renal, gonadal, phrenic) and the primary organs each branch supplies.

Clinical Relevance

Nursing practice connection: Knowing Arterial supply of the diaphragm helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding the diaphragm's blood supply is critical for surgeons operating in the upper abdomen or thorax to avoid accidental injury to the phrenic arteries, which could lead to diaphragmatic paralysis or weakness.
Referred pain from the diaphragm (e.g., irritation from subphrenic abscess) is often felt in the shoulder tip because both are supplied by the phrenic nerve (C3, C4, C5). While the question is about arteries, this is a related high-yield clinical concept.
What if? If a patient has a large, rapidly growing tumor on the superior pole of the left kidney, it could potentially compress the left inferior phrenic artery. This could lead to localized diaphragmatic ischemia, presenting as left-sided pleuritic chest pain or shortness of breath.

How to Approach the Question

First, identify the key anatomical structure in the question, which is the 'diaphragm'.
Next, identify the core question being asked: 'What artery supplies it with blood?'. This is a direct anatomical recall question.
Analyze the provided image. The image clearly shows arteries branching off the aorta and going to the diaphragm. Trace these vessels and identify their names if labeled.
Evaluate each option based on your anatomical knowledge and the visual aid. The term 'phrenic' is directly related to the diaphragm (e.g., phrenic nerve). This is a strong clue.
Eliminate the other options by recalling the organs they supply: 'mesenteric' relates to the intestines, 'suprarenal' to the adrenal glands, and 'coeliac' to the foregut (stomach, liver, spleen).
Confirm your choice. The inferior phrenic arteries are the correct vessels supplying the diaphragm.

Concept Tested & Keywords

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