A nurse is providing dietary teaching to a client who has a new diagnosis of irritable bowel syndrome. Which of the following recommendations should the nurse include?

A. Muffled heart sounds: Muffled or distant heart sounds occur due to accumulation of fluid in the pericardial sac, which dampens the transmission of heart sounds. This is an early and classic manifestation of cardiac tamponade, reflecting impaired ventricular filling and reduced stroke volume. Prompt recognition is critical to prevent hemodynamic compromise.

B. Decreased jugular vein distention: Cardiac tamponade typically causes increased jugular vein distention due to impaired right atrial filling and elevated central venous pressure. A decrease in jugular venous distention would be inconsistent with this condition.

C. Widening pulse pressure: Cardiac tamponade usually produces a narrowing pulse pressure due to reduced stroke volume and systolic pressure, rather than widening. A widened pulse pressure is more characteristic of conditions like aortic regurgitation.

D. Coarse lung sounds: Coarse lung sounds are associated with pulmonary edema or fluid in the alveoli, not with pericardial tamponade. Lung sounds are often normal in early tamponade unless concurrent pulmonary complications are present.

A. Apply a tourniquet below the venipuncture site: The tourniquet should be applied above the intended insertion site to impede venous return and distend the vein. Placing it below the site would not promote vein filling and can hinder successful cannulation.

B. Elevate the client's arm prior to insertion: Lowering the arm below heart level promotes venous filling by gravity, making veins easier to visualize and palpate. Elevating the arm can cause veins to collapse and make insertion more difficult.

C. Choose a vein that is palpable and straight: A straight, resilient vein that can be palpated is less likely to roll and allows smoother catheter advancement. This reduces infiltration risk and increases the likelihood of a successful IV start.

D. Select a site on the client's dominant arm: The non-dominant arm is preferred to promote comfort and reduce interference with daily activities. Using the dominant arm can limit mobility and increase the risk of dislodgement.