Instruction 15-8
Four Surgical Procedures Currently Are Used to Install

question 114

True/False

Instruction 15-8
Four surgical procedures currently are used to install pacemakers.If the patient does not need to return for follow-up surgery,the operation is called a "clear" operation.A heart centre wants to compare the proportion of clear operations for the four procedures,and collects the following numbers of patients from their own records:
| Procedure |
$$\begin{array} { | l | c | c | c | c | c | } \hline & \mathrm { A } & \mathrm { B } & \mathrm { C } & \mathrm { D } & \text { Total } \\\hline \text { Clear } & 27 & 41 & 21 & 7 & 96 \\\hline \text { Return } & 11 & 15 & 9 & 11 & 46 \\\hline \text { Total } & 38 & 56 & 30 & 18 & 142 \\\hline\end{array}$$ They will use this information to test for a difference among the proportion of clear operations using a chi-square test with a 0.05 level of significance.
-Referring to Instruction 15-8,there is sufficient evidence to conclude that the proportions between procedure A and procedure C are different at a 0.05 level of significance.

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Definitions:

Suctioning

The process of removing mucus and other fluids from a patient's airway using a suction device to maintain airway patency.

Ear Irrigation

A medical procedure used to remove earwax buildup or foreign objects from the ear canal with a stream of fluid.

Vital Signs

are the measurements of the body’s most basic functions, including temperature, blood pressure, pulse, and respiratory rate.

Seizure Precautions

Measures taken to protect someone from injury during a seizure, such as removing nearby hazards and providing a safe place to lie down.