Egan Chapter 33 Workbook Answers

Working Through Egan Chapter 33: What Actually Helps

I spent way too many late nights going through the Egan Chapter 33 Workbook Answers material when I was studying for my respiratory therapy boards. It's not the hardest chapter, but it's one of those where the questions seem straightforward and then you realize you don't actually understand the underlying mechanism well enough to answer variations of the same question. Here's what I learned from doing it the long way. The official answer key comes with the textbook package if your instructor includes it. Some editions ship it as a separate PDF, some as a print booklet stapled into the back. If you're buying used, that's often missing. The alternative sources floating around online vary wildly in accuracy. I found that answers on free study sites had maybe a 60% match rate against the actual key. You end up double-guessing yourself more than you need to. The most reliable route is your course portal. Most instructors upload a scanned copy to Canvas or Blackboard. If yours hasn't, ask. Some hide them behind quiz locks, which is annoying but not unusual for clinical programs. A second option is the publisher's companion site. Elsevier usually requires an access code that comes with new books, but professors sometimes have institutional codes they'll share if you ask politely.

I remember one specific problem where the workbook asked about a patient with a closed thoracostomy tube system and a persistent air leak. The answer key said to check the water seal chamber for bubbling, but the explanation completely skipped over why you wouldn't clamp the tubing on the opposite side. I spent twenty minutes Googling before I remembered from clinical rotation that you never clamp a chest tube without a physician order and a clear reason. The workbook answer assumed clinical judgment I hadn't been taught yet. That's the kind of gap that shows up across multiple chapters in Egan.

The Content Itself

Chapter 33 generally covers pleural drainage systems and management of chest tubes. The workbook questions dig into physics of water seals, measurement of drainage volume, troubleshooting air leaks, and recognizing complications like subcutaneous emphysema or tension physiology. It's clinically heavy for a chapter that doesn't get nearly as much classroom time as the gas exchange chapters. The questions test two things: can you identify the normal finding versus the abnormal one, and can you trace a system failure back to its source. Most students ace the first type and choke on the second. I recommend drawing out the three-chamber system from memory before you even open the workbook. If you can label the collection chamber, the water seal, and the suction control chamber and explain what goes in each one without looking, you've already passed half the quiz. One counter-intuitive point that trips people up: a water seal chamber that shows tidaling but no bubbling is not necessarily a problem. Tidaling decreases as the lung re-expands, and by the time the lung is fully re-expanded, tidaling may stop entirely. The workbook sometimes frames this as a sign of resolution and other times as a sign of obstruction depending on the surrounding context. That context is everything.

How to Use the Answer Key Without Sabotaging Your Learning

The biggest mistake students make is looking at the answer right after getting a question wrong. They read the correct choice, nod, and move on. They don't retain anything because they never struggled with the gap in their understanding. I started doing this instead: when I got a question wrong, I'd close the book and go find the relevant section in the main Egan text. I'd re-read the paragraph, draw a quick diagram, and only then check the answer. This added fifteen minutes per question but roughly tripled my retention on the second pass through the chapter. Another technique that worked better than expected was explaining each answer out loud as if I were teaching it to someone else. If I couldn't say why answer B was right and answer D was wrong in a single breath, I hadn't actually learned it. I'd catch myself on questions about negative intrapleural pressure calculations and the difference between open and closed drainage systems. Getting those explanations smooth took about three retries per question on average. There's a real downside to relying on workbook answers too aggressively. The NBRC exam loves to take a scenario from the chapter and flip one variable. A question about a patient with a pneumothorax might suddenly introduce a patient on positive end-expiratory pressure, and the answer choice that was correct in the workbook context becomes wrong because the underlying physiology has shifted. The workbook answers can create a false sense of mastery if you're not actively questioning the assumptions behind each one.

Common Pitfalls in the Chapter

Students consistently mess up the suction regulator settings. The question will give you a desired wall suction value and ask what the regulator should be set to. The trick is that the regulator controls flow, not the actual pressure delivered to the patient. If the workbook answer says set it to 100 cm HO and you just memorize that number without understanding why, you'll get burned on a variation that changes the wall suction source or the tubing length. Another frequent stumbling block is the interpretation of drainage characteristics. Blood-tinged fluid in the first twenty-four hours is normal. Bright red blood exceeding 100 mL in an hour is not. The workbook questions tend to blur this line deliberately, and the answer depends on timing, not just color. I found that creating a simple timeline chart in the margin of my notebook helped. First six hours, six to twenty-four hours, twenty-four to forty-eight hours. Each band has different expected findings and different red flags. There's also the issue of interpreting the manometer reading in the water seal chamber. Some questions ask what the reading represents. The answer is the pleural pressure, not the airway pressure, not the transpulmonary pressure. Beginners conflate these constantly because the numbers are in the same ballpark. I once marked an answer wrong on a practice quiz by selecting transpulmonary pressure instead of intrapleural pressure. The distinction matters clinically but the workbook rarely explains why it matters beyond the definition.

A Practical Workaround for Incomplete Keys

When I couldn't find an official answer key for my edition, I used a cross-referencing method. I'd take each workbook question, type the key phrase into a search engine with the words "respiratory care" and "Egan" appended, and see if other students had discussed it on forums like Student Doctor or allnurses. The discussion threads weren't always accurate, but they were useful for identifying which answers were controversial. If three different sources agreed on an answer and one disagreed, the consensus was usually right. If they split evenly, I flagged it and went back to the textbook. This approach took longer than having the key in hand, probably double the time, but it forced me to engage with the material in a way that stuck. I still remember the answer to the question about when to remove a chest tube because I had to argue with an anonymous forum poster about it. That kind of friction is educational, even if it's exhausting.

Bottom Line

The workbook answers are a study tool, not a substitute for understanding the chapter. The chapter itself is dense with clinical decision-making scenarios that don't always translate cleanly into multiple-choice format. The real learning happens in the moments between reading a question, realizing you're unsure, and figuring out why. Don't shortcut that process. The exam won't care that you matched the right letter to the right question. It'll care that you can handle a chest tube situation when the numbers don't look exactly like the textbook version.