Final answer:
Post-op clients are typically placed in the Fowler's position, unless another position is indicated due to surgical or patient-specific factors, to aid in breathing and prevent respiratory complications.
Step-by-step explanation:
Unless contraindicated, post-op clients should generally be placed in the Fowler's position. This position is particularly beneficial as it can help increase lung expansion and reduce the risk of respiratory complications, such as atelectasis or pneumonia, which are common concerns following surgery. Placing a patient in supine, Trendelenburg, or left lateral may be recommended for specific clinical reasons, but Fowler's position is often the default position to help with breathing and comfort unless another position has been recommended due to the specific nature of the surgery or the patient's condition.