Study guide
This chapter combines two closely linked subcategories of Physiological Integrity: Basic Care and Comfort, and Pharmacological and Parenteral Therapies, the latter commonly cited around 12-18% of scored NCLEX-RN items and among the most heavily weighted subcategories on the exam. It covers mobility support, nutrition and aspiration precautions, dosage and infusion calculations, high-alert medication safety, blood product administration, and pharmacologic pain management. Specific dosing protocols, facility double-check policies, and drug references change and vary by institution, so treat the calculation methods and safety principles here as durable reasoning tools to apply against whatever current order and reference is in front of you.
Mobility, Nutrition, and Aspiration Precautions
Mobility support includes fall-risk assessment, safe transfer and gait-belt technique, and correct use of assistive devices such as a single-tip cane, which is held on the client's stronger (unaffected) side and advanced together with the weaker leg, so the cane and the strong leg share weight-bearing while the weak leg swings through; holding the cane on the weak side, or advancing it out of step with the weak leg (either ahead of or trailing both legs), both remove the intended support and increase fall risk. Nutrition assessment considers intake, weight trends, and swallowing safety; a client with a new stroke or other cause of dysphagia should be screened for swallowing safety before oral intake resumes, since aspiration is a leading safety concern in this population. Safe feeding technique for a client with dysphagia includes positioning the client fully upright (commonly at or near 90 degrees) before offering any food, placing small bites on the unaffected side of the mouth to promote effective chewing and swallowing, and checking for pocketed food in the cheek before offering the next bite — all of which are correct techniques that should not be flagged as errors when supervising an assistive person. By contrast, offering thin liquids through a straw is generally unsafe in dysphagia, because thin liquids are the hardest consistency to control and a straw delivers liquid rapidly toward the pharynx before the swallow can be coordinated; liquids should instead be thickened as prescribed and offered by cup or spoon at a controlled pace, so an assistive person offering thin water through a straw is the action that requires the nurse to intervene.
Oral Dosage and IV Flow-Rate Calculations
Oral and parenteral dosage calculations follow the same core logic: find the amount of drug per unit of the supplied form (concentration), then determine how many units of that form deliver the ordered dose. For a suspension labeled 125 mg per 5 mL with an order for 300 mg, first find the concentration per mL (125 mg ÷ 5 mL = 25 mg/mL), then divide the ordered dose by that concentration (300 mg ÷ 25 mg/mL = 12 mL); a quick cross-check is to divide the ordered dose by the labeled dose and multiply by the labeled volume (300 ÷ 125 = 2.4, then 2.4 × 5 mL = 12 mL), which should produce the same answer. IV flow-rate calculations for gravity tubing require converting a total volume and total infusion time into drops per minute using the administration set's drop factor: first find the hourly rate (total volume ÷ total hours), then multiply by the drop factor and divide by 60 minutes. For 1,000 mL over 8 hours with a drop factor of 15 gtt/mL: 1,000 ÷ 8 = 125 mL/hr; 125 × 15 ÷ 60 = 31.25, which rounds to 31 gtt/min. A frequent error source is confusing an hourly mL rate with a drops-per-minute rate, or using the wrong drop factor from the tubing label; both produce a plausible-looking but incorrect number, so always re-derive the answer using the two-step method (rate per hour, then drops per minute) rather than pattern-matching to a memorized number.
High-Alert Medications and Independent Double-Checks
High-alert medications are drugs that carry a heightened risk of serious harm if administered incorrectly, even though errors with them are not necessarily more common than with other drugs; commonly cited categories include anticoagulants (heparin, warfarin, direct oral anticoagulants), insulin, opioids, concentrated electrolytes such as potassium chloride, and chemotherapy agents. The core safety practice for high-alert medications, especially continuous infusions like heparin, is an independent double-check: a second qualified nurse separately and independently verifies the order, the drug concentration, the calculated dose, and the actual pump settings before the infusion starts or a rate is changed, rather than confirming from memory, checking only that the correct bag arrived on the unit, or comparing settings against a previous shift's numbers after the infusion is already running. Verification must happen at the bedside before the drug reaches the client, because by the time an error would show up in a retrospective comparison, it would have already been delivered. Anticoagulant therapy in particular is monitored against lab trends rather than a single value: international normalized ratio (INR) is used to monitor and adjust warfarin dosing, and activated partial thromboplastin time (aPTT) is used to monitor and adjust heparin dosing, with dose changes guided by the trend over time and current facility protocol rather than any single isolated lab draw.
Blood Product Administration and Transfusion Reactions
Safe blood product administration requires verifying the order, confirming the client's identity and blood type/crossmatch compatibility with another qualified staff member per facility policy, obtaining baseline vital signs before starting, and beginning the infusion slowly while remaining with the client for the first several minutes, since a transfusion reaction is most likely to appear early. A transfusion reaction can present as chills, fever, flank or back pain, hypotension, or other signs of hemolysis or immune response — for example, chills, flank pain, and a temperature rising from 37.0°C to 38.4°C fifteen minutes after a unit of packed red blood cells is started — and the first action whenever these signs appear, regardless of how mild they initially seem, is to stop the transfusion immediately, keep the IV line open with 0.9% sodium chloride through new tubing (not the tubing that carried the blood product), and then notify the provider and the blood bank while continuing to monitor the client closely. Slowing the infusion rather than stopping it, or treating the fever with an antipyretic while continuing the transfusion, both reflect the mistaken assumption that a transfusion reaction is dose-dependent or that treating a symptom addresses the underlying cause; any additional volume of incompatible or reactive blood product can worsen a hemolytic reaction, so the infusion must be stopped completely before any other step, including notification, takes place.
Pharmacologic Pain Management and Opioid Safety
Pharmacologic pain management follows a stepped approach based on pain severity, using non-opioid analgesics (acetaminophen, NSAIDs) for mild pain and opioids for moderate to severe pain, often in combination with non-opioid adjuncts to improve relief while limiting opioid dose. When opioids are used, the most important ongoing safety indicators are respiratory rate, sedation level, and pupil size, because opioid-induced respiratory depression is the most dangerous adverse effect and can occur even in a client who appears to be simply sleeping deeply. Warning signs of opioid-induced respiratory depression include a respiratory rate below roughly 8-10 breaths per minute, difficulty arousing the client, and pinpoint (miotic) pupils — for example, a client on patient-controlled analgesia after abdominal surgery who is difficult to arouse with a respiratory rate of 7; when these signs are present, the correct first actions are to stop the opioid source (including the PCA pump), attempt to arouse and stimulate the client, support ventilation, and prepare to administer naloxone, an opioid antagonist, per protocol. Reducing a future dose, continuing to monitor at a fixed interval without acting, or adding supplemental oxygen while relying on family to keep the client awake all fail to reverse the opioid already circulating in the client's system and delay the one intervention that actually restores respiratory drive. Because opioid-naive clients are at higher risk for this complication than clients with established tolerance, closer monitoring is warranted whenever opioids are newly started, regardless of the prescribed dose appearing standard.
Key terms
- Single-tip cane technique
- — Correct use of a cane on the stronger side of the body, advanced together with the weaker leg to share weight-bearing support.
- Dysphagia
- — Difficulty swallowing, screened for after conditions such as stroke, that raises aspiration risk during oral intake.
- Drop factor
- — The number of drops per milliliter delivered by a specific IV administration set, used to convert an hourly infusion rate into drops per minute.
- High-alert medication
- — A drug category, such as anticoagulants, insulin, opioids, or concentrated electrolytes, with heightened risk of serious harm if administered incorrectly.
- Independent double-check
- — A second qualified nurse separately verifying the order, concentration, dose, and pump settings for a high-alert medication before it is given or changed.
- INR (international normalized ratio)
- — A lab value used to monitor and adjust warfarin dosing based on the trend over time.
- aPTT (activated partial thromboplastin time)
- — A lab value used to monitor and adjust heparin dosing.
- Transfusion reaction
- — An adverse response to a blood product — such as fever, chills, back pain, or hypotension — most likely to appear early, requiring the infusion to be stopped immediately.
- Opioid-induced respiratory depression
- — A dangerous slowing of breathing caused by excess opioid effect, marked by a low respiratory rate, sedation, and pinpoint pupils, reversed with naloxone.
- Naloxone
- — An opioid antagonist used to reverse opioid-induced respiratory depression and sedation.
Exam tips
- For cane-gait questions, confirm the cane is on the strong side and moves with the weak leg; any answer pairing the cane with the weak side, or timing it with the strong leg, is incorrect.
- In dysphagia 'which action requires intervention' items, thin liquids through a straw is the classic unsafe action; upright positioning, feeding on the unaffected side, and checking for pocketed food are all correct techniques and should not be selected.
- For every dosage or IV rate calculation, re-derive the number from the concentration and time given rather than pattern-matching an answer choice; check your work a second way (cross-multiplication or unit cancellation) before selecting.
- On high-alert medication items, the correct safety action is almost always an independent double-check performed before the infusion starts or changes, not a check performed afterward or limited to confirming delivery.
- For a suspected transfusion reaction, the sequence is always stop the transfusion, keep the line open with saline on new tubing, then notify the provider and blood bank — never slow the rate or premedicate and continue.
- When a stem describes sedation, a respiratory rate below about 8-10, and pinpoint pupils in a client on opioids, the correct first action is to stop the opioid, attempt arousal, support ventilation, and prepare naloxone — not to simply reduce a future dose.