Clinical Nutrition and Dietetics

01Purpose and scope

• This manual supports the course Clinical Nutrition and Dietetics. It describes how nutrition care is actually delivered to patients in hospitals, long-term care, outpatient clinics and home health settings, from the first referral through discharge and follow-up. It is written as a working reference for dietitians, nutrition support clinicians, nursing staff who share nutrition tasks, and learners preparing for supervised clinical placements.
• The scope covers nutrition screening and assessment, diagnosis of nutrition problems, planning medical nutrition therapy, modifying diets for medical conditions and swallowing difficulties, coordinating enteral and parenteral nutrition support, counseling, and documenting each step. It does not cover the full medical management of the underlying disease, which remains with the treating physician or advanced practice provider.
• This guidance does not replace qualified professional judgment, approved procedures or required authorization. Scope of practice, prescribing rights, licensure, privacy obligations and food service rules vary by jurisdiction and by employer. Check the current requirements of your licensing board, your national or regional dietetics association, and your facility policy before acting on anything in this manual.

02Core principles

• Nutrition care starts with the individual. A diet that is correct on paper can still fail if the patient cannot chew it, does not like it, cannot afford the supplements, or is eating alone at night with no help opening containers. Good practice means asking what the patient eats now, what they are willing to change, and what they are able to manage at home.
• Keep the least restrictive diet that meets medical and nutritional needs. Restrictions such as low sodium, carbohydrate-controlled or texture-modified diets are useful when they target a specific problem, but each one reduces intake and enjoyment. Every restriction should have a stated reason and a plan for when it will be reviewed.
• Treat weight, labs and intake as clues rather than verdicts. Serum albumin and prealbumin mostly reflect inflammation, fluid status and liver function, so they should not be used alone to diagnose malnutrition. Weight change can reflect fluid shifts, and a single intake estimate from a busy shift may not describe the week.
• Work as part of a team. Nursing staff see intake at meals, speech-language pathologists assess swallowing, pharmacists check drug-nutrient interactions, and food service determines what can actually be produced. Nutrition plans that ignore these inputs tend to be ignored themselves.
• Safety comes before preference. Feeding tube administration, texture modification for aspiration risk, and management of refeeding risk carry direct harm if done incorrectly. When in doubt, pause, verify the order and ask the prescriber or a senior colleague.

03Planning and preparation

• Before seeing a patient, review the referral or order and identify the reason for it. A referral for weight loss, a new tube feed, a diabetic meal plan and a request to advance a diet after surgery each call for a different starting point. Confirm the diagnosis list, current diet order, allergies, intolerances, and any religious, cultural or texture needs recorded in the chart.
• Collect the data that bears on nutrition. This usually includes height, current weight and recent weight history, body mass index where appropriate, renal and hepatic function, glucose control, electrolytes including phosphate, magnesium and potassium when relevant, wound status, bowel function, and the medication list. Look for medications that affect appetite, taste, absorption or fluid balance, and for drugs that interact with food, such as the consistency of vitamin K intake for patients taking warfarin.
• Choose the screening or assessment framework your setting uses. The Malnutrition Universal Screening Tool is widely used for adults in community and hospital screening. The Global Leadership Initiative on Malnutrition criteria provide a structured way to diagnose malnutrition once a risk has been identified, using phenotypic and etiologic criteria. Your facility may require a specific tool, so confirm which one is mandated before you start.
• Know your equipment and food resources. Check which oral nutrition supplements are on formulary, whether the unit has a texture-modified menu that follows a recognized framework such as the International Dysphagia Diet Standardisation Initiative levels, and how quickly the kitchen can accommodate changes. A plan the kitchen cannot deliver before the next meal is not a plan.

04Recommended workflow

1. 1
   : Receive and triage the referral. Sort it by urgency. A patient who has not eaten for several days, has a potassium of concern, or is about to start feeding support needs same-shift attention. A routine weight check for an outpatient can wait for the next scheduled visit. Record the time received and the time you started the assessment, since many facilities track this.
2. 2
   : Screen and confirm nutrition risk. Apply the agreed screening tool using current data. If the patient is at risk, move to full assessment. If screening is negative but the referral concern remains, document the screening result and the reason for continued contact so the next clinician understands the situation.
3. 3
   : Complete the nutrition assessment. Take a diet history covering usual intake, recent changes, food preferences, chewing and swallowing, appetite, alcohol and tobacco use, and financial or social barriers to eating. Measure weight, height and any relevant anthropometry, and examine for muscle loss and fat loss in the temporal, clavicular and quadriceps areas. Check grip strength or other functional measures where available. Estimate energy, protein and fluid needs using a method your facility accepts, and state the method used.
4. 4
   : Write the nutrition diagnosis. The Nutrition Care Process from the Academy of Nutrition and Dietetics uses a problem, etiology and signs or symptoms statement. For example: inadequate oral intake related to dysphagia after stroke as evidenced by coughing with thin liquids and a meal intake of about one third of the tray over three days. A precise statement points directly to an intervention and makes later evaluation possible.
5. 5
   : Plan and deliver the intervention. Choose interventions that match the diagnosis. Options include changing the diet order, providing a texture-modified diet, adding an oral supplement at a specific frequency, setting a feeding tube regimen with a defined rate and flush protocol, coordinating with speech-language pathology for a swallow study, or arranging a referral to diabetes education. Explain the plan to the patient in plain language and confirm the patient agrees to it. Write the order request clearly so the prescriber can act.
6. 6
   : Monitor and evaluate. Set a review interval appropriate to the problem, such as daily intake review for a patient on a new feeding regimen or weekly weight review for a community patient. Track the indicators named in the plan. Decide at each review whether to continue, change or stop the intervention, and record the reason.
7. 7
   : Plan the transition. Before discharge or transfer, confirm the diet order that will apply at the next setting, check that supplies and prescriptions are available, teach the patient or caregiver the key points using teach-back, and send a summary to the receiving clinician. Patients who leave hospital with a texture-modified diet and no written instructions frequently return to the wrong diet at home.

05Quality checks, risk controls and compliance

• Verify every feeding order before administration. Check the patient identity, the product, the rate, the volume, the start time and the route. Confirm the tube position according to facility policy before use, since misplacement is a serious and avoidable hazard. Two-person checks are common for high-alert infusions and are required by many facilities for parenteral nutrition.
• Watch for refeeding risk in patients who have eaten little for several days or who have significant weight loss. Electrolyte shifts, particularly low phosphate, can develop once carbohydrate intake starts. Use the recognized criteria in your facility protocol to identify risk, start intake at a level the protocol specifies, and check electrolytes at the interval the protocol sets. Do not invent a starting calorie level from memory.
• Check diet orders against allergies, drug interactions and medical restrictions. A diet order for a diabetic patient that includes a sugar-sweetened supplement at every meal, or a low-potassium diet for a patient who is not restricted, is a common source of error. Confirm that texture orders match the most recent swallow evaluation.
• Protect privacy and handle records as your jurisdiction requires. In the United States, the Health Insurance Portability and Accountability Act sets rules for patient information. Other countries and regions have their own privacy laws. Do not discuss patients in public areas, and share information only with people involved in care.
• Follow food safety and infection control rules. Handling of breast milk, infant formula, tube feed sets and perishable supplements is governed by facility policy and, in many places, by regulation. Storage temperatures, expiry dates and open-container rules must be followed.
• Know your professional and regulatory obligations. Scope of practice, the ability to order tests or prescribe supplements, and the requirement for a licensed prescriber to sign certain orders differ across jurisdictions and employers. Consult the current rules of your licensing body and your facility, and escalate questions to a supervisor or the medical team.

06Collaboration and documentation

• Write notes that another clinician can act on without calling you. A useful note states the assessment findings, the nutrition diagnosis, the intervention and its rationale, the monitoring plan, and who was informed. Avoid vague phrases such as eating poorly. Write the actual intake, the actual weight change and the actual swallow findings, with the source of each number.
• Use the documentation format your facility requires. Many settings use a structured format such as the nutrition care note aligned to the Nutrition Care Process, while others use a problem-oriented or SOAP structure. Time limits for completing notes are set by policy, and late entries should be labeled as late with the date of entry shown in the record system.
• Communicate with the team in a way that closes the loop. Tell the prescriber about changes that need an order. Tell nursing about feeding schedules and about any change that affects medication timing. Tell food service about texture or allergy changes the same day. Send a message when a plan is not working, rather than waiting for the next scheduled review.
• Involve the patient and family. Ask what matters to them about eating, such as cultural foods, shared meals or preparation time. Document their preferences and any refusals with the information given to them, so refusals are informed and recorded rather than assumed.

07Measures and continuous improvement

• Choose indicators that reflect the outcomes the plan targets. For an inpatient with inadequate intake, the indicators might include the percentage of estimated energy and protein needs met, the number of days to reach a stated intake goal, and weight trend where weight is reliable. For a community patient with heart failure, weight and fluid intake may be more useful. Pick a small set of indicators and define how each is measured before you start collecting them.
• Audit your own documentation and practice on a regular schedule. A simple audit might review a random sample of nutrition notes for completeness, check whether diet orders matched the assessment, and count how many screening referrals were completed within the facility's time limit. Use the results to change one thing at a time and recheck.
• Look for patterns rather than single events. If several patients on a unit lose weight after a change in menu supply, the problem may be in the process rather than with individual patients. Bring the pattern to the nutrition committee or quality team with specific examples and proposed changes.
• Avoid setting targets without a basis. Benchmarks for indicators such as screening completion rate or time to first assessment should come from your facility, your accrediting body or your professional association. If no benchmark exists, track your own baseline and compare changes over time.

08Common mistakes and how to prevent them

• Copying an old diet order forward without reassessing. Diet needs change after surgery, with new medications, or when swallowing improves. Prevent this by reviewing the current assessment on each contact and asking whether the order still matches the problem.
• Using albumin or prealbumin as the main marker of malnutrition. These values respond to inflammation, hydration and liver function. Prevent this by using a structured screening and diagnostic framework, documented weight history, intake data and a physical examination.
• Ignoring medication timing and interactions. Some medications should be taken with food, others on an empty stomach, and some interact with specific nutrients. Prevent this by checking the medication list at every assessment and confirming with the pharmacist when the interaction is unclear.
• Writing restrictions with no end point. Restricted diets can persist long after the reason has passed, leading to poor intake and weight loss. Prevent this by stating the reason and the review date for each restriction in the order request.
• Misreading fluid-related weight change. Edema can hide weight loss, and diuresis can make weight fall without tissue loss. Prevent this by recording fluid balance and examining for edema at the same time as weight.
• Starting feeding support without a plan for monitoring. A tube feed or parenteral infusion without electrolyte checks, glucose monitoring or intake review can cause harm before anyone notices. Prevent this by writing the monitoring schedule into the order and the note at the time the support starts.
• Failing to plan for the next setting. Patients who leave hospital without clear diet instructions, supplies or follow-up often return with the same problem. Prevent this by starting transition planning at admission and confirming details before discharge.

09Practical checklist

• Confirm the reason for referral and the urgency before starting the assessment.
• Review diagnoses, allergies, medications, renal and hepatic function, and swallowing status in the chart.
• Apply the required screening tool and record the result and the reason for any further assessment.
• Take a diet history that includes usual intake, recent changes, preferences and barriers to eating.
• Measure weight and height, examine for muscle and fat loss, and document the method used for energy and protein estimates.
• Write a nutrition diagnosis that names the problem, the cause and the signs or symptoms.
• Select interventions that match the diagnosis, state the goal, and confirm the patient agrees.
• Check feeding orders against the two-person or verification policy before administration.
• Screen for refeeding risk and set electrolyte monitoring when the protocol requires it.
• Set a review date for every diet restriction and for every feeding support order.
• Send the transition summary and confirm diet, supplies and follow-up before the patient leaves.

★Learning sources

• Micro Degree: Clinical Nutrition and Dietetics
• Micro Degree: Healthcare Administration Practice
• Micro Degree: Physiotherapy Assistant Operations
• Micro Degree: Cardiac Care Support