A nursing care delivery model (also called a care delivery system or patient care assignment model) is the way a unit organizes nursing work: who is assigned to which clients, who makes clinical decisions, who communicates with other disciplines, and who is accountable for outcomes over time. The model shapes continuity, client satisfaction, staff satisfaction, and cost.
No single model is best. Units choose or blend models based on:
- Client factors — acuity, complexity, length of stay, need for continuity
- Staff factors — number of RNs, skill mix (RN, LPN/LVN, unlicensed assistive personnel), experience
- Organizational factors — budget, physical layout, technology, philosophy of care, and any state staffing laws
- Legal factors — the state Nurse Practice Act determines which tasks can be assigned or delegated to LPN/LVNs and assistive personnel
The main models (in approximate historical order)
| Model | How it works | Advantages | Disadvantages |
|---|
| Total patient care (case method) | One nurse provides all care for a small group of clients for the shift; the oldest model (private duty nursing) and used today in critical care | Holistic care, clear accountability for the shift, high client satisfaction | Costly; needs many RNs; continuity lost between shifts |
| Functional nursing | Work divided by task — one nurse gives all medications, another does treatments, assistants take vital signs; the charge nurse coordinates. Grew during nursing shortages around World War II | Efficient and economical; uses less-skilled workers for routine tasks | Fragmented care; no one sees the whole client; unclear accountability; low client and nurse satisfaction |
| Team nursing | An RN team leader directs a small team (RNs, LPN/LVNs, assistive personnel) caring for a group of clients; developed in the 1950s | Uses each member's skills; team collaboration; supervision of less-experienced staff | Depends on the team leader's skill and on team conferences; can become functional nursing within the team; communication gaps |
| Modular nursing | A variation of team nursing: a small team is assigned to a geographic area (module) of the unit and stays with it | Less walking, more RN involvement, better continuity than traditional team nursing | Requires sufficient RNs; accountability can still be shared |
| Primary nursing | A primary nurse is accountable 24 hours a day for the whole stay — assesses, plans, and coordinates care from admission to discharge; associate nurses follow the plan when the primary nurse is off duty; developed in the late 1960s–1970s | Continuity, autonomy, clear accountability, strong nurse–client relationship | Requires a high proportion of experienced RNs; costly; hard with short stays and 12-hour shift patterns |
| Case management | A case manager (often an RN or social worker) coordinates care across the continuum for high-cost or high-risk clients, often using clinical pathways (critical paths) with expected outcomes by day; tracks variances | Coordinated, outcome-focused, controls length of stay and cost | Case manager may not give direct care; standardization may limit individualization |
| Partnership (co-primary / skill-mix pairing) | An RN is paired with an LPN/LVN or assistive person who works the same schedule and helps care for the RN's clients | Uses skill mix; consistent partner | RN retains supervision burden; depends on the partnership |
Newer and blended approaches
- Patient-centered (patient-focused) care — brings services to the bedside with cross-trained teams, reducing handoffs and the number of workers a client sees.
- Clinical nurse leader (CNL) — a master's-prepared generalist role (defined by the American Association of Colleges of Nursing) that oversees care coordination and quality for a cohort of clients at the unit level.
- Care coordination and transitional care models — nurses coordinate discharge, follow-up, and community resources to prevent readmission.
- Virtual nursing — an experienced nurse supports bedside teams remotely (admission and discharge teaching, documentation, surveillance, mentoring); increasingly used since the COVID-19 pandemic. It supplements, not replaces, the bedside nurse.
- Differentiated practice — roles are assigned according to education, experience, and competence.
Case management terms
- Clinical pathway (critical pathway): a multidisciplinary plan listing the expected interventions and outcomes on a timeline for a specific diagnosis or procedure.
- Variance: any deviation from the pathway (client-related, provider-related, or system-related); variances are documented and analyzed.
- Case management goal: quality outcomes at appropriate cost, with appropriate length of stay.
- Choosing a model: match the model to acuity, skill mix, and budget. Critical care often uses total patient care; many medical-surgical units use team or modular approaches with RN-to-assistant partnerships; primary nursing is valued where continuity matters (oncology, long-stay rehabilitation).
- Making assignments within a model: consider client acuity and stability, the predictability of the client's condition, the skills and competence of each caregiver, geographic proximity, continuity with the same nurse, and the need for supervision of newer staff.
- Team leader duties: receive handoff, make assignments, hold brief team huddles or conferences, update care plans, supervise delegated tasks, handle complex care and communication with providers, and evaluate outcomes.
- Primary nurse duties: complete the admission assessment and care plan, coordinate with the interdisciplinary team and family, write the plan the associate nurses follow, and plan discharge.
- Case manager duties: screen for high-risk clients, coordinate services and payers, monitor pathways and variances, arrange transitions and follow-up.
- Preceptorship is a teaching relationship for orienting a new nurse or student, not a care delivery model; the preceptor remains responsible for the care given under supervision.
- RN in any model: retains responsibility for assessment, nursing judgment, care planning, teaching that requires nursing judgment, and evaluation — these cannot be delegated to assistive personnel (assistive personnel may reinforce teaching the RN has already given, where state rules allow).
- Delegation within a team: follow the five rights of delegation (right task, circumstance, person, directions and communication, supervision and evaluation) and the state Nurse Practice Act.
- Communication: team conferences, huddles, and structured handoff (for example, SBAR or I-PASS) are essential in team, modular, and functional models, where fragmentation is the main risk.
- Nurse manager: selects and evaluates the model, trains staff, measures outcomes (falls, pressure injuries, satisfaction, length of stay, cost, staff turnover), and redesigns when needs change.
- State Nurse Practice Acts and board rules define what LPN/LVNs and assistive personnel may do; a care model cannot assign tasks outside these limits. The NCSBN and ANA National Guidelines for Nursing Delegation describe the delegation process.
- Accountability: in functional and team models, "everyone was involved" is not a defense — each nurse is accountable for the care they give and for supervision of care they delegate. The RN who delegates remains accountable for the decision to delegate.
- Continuity and abandonment: at shift change the nurse must hand off care to a qualified nurse before leaving.
- Staffing laws: California sets minimum licensed nurse-to-patient ratios in hospital units; Oregon enacted statutory RN ratios in 2023. Any model on those units must still meet the ratios (see Topic 14).
- Ethics: the model should support client dignity, informed participation, and fair distribution of nursing time.
Case 1 — Recognizing the model. On a unit, one RN gives all medications, another performs all dressings, and assistants take all vital signs. A client's rising pain and new confusion are noticed by three people, but no one connects the findings. Analysis: this is functional nursing; its main weakness is fragmented care with unclear accountability. Correct action: assign one RN to each client's overall assessment and escalation.
Case 2 — Team leader priority. A team leader has two RNs, one LPN, and one assistant. Which client should the team leader keep or assign to an RN: a stable client needing a routine bath, or a client admitted 1 hour ago with a new chest tube? Correct: the new, unstable client goes to an RN (assessment and unpredictable condition); the bath can be delegated to the assistant.
Case 3 — Primary nursing accountability. A primary nurse is off duty for three days. The associate nurse notices the discharge teaching plan is incomplete. Correct action: follow and update the plan as needed, communicate with the primary nurse, and document. Why: the primary nurse keeps 24-hour accountability for the plan, but the nurse on duty is responsible for the care given that shift.
Case 4 — Case management variance. A client after total knee replacement has not met the pathway goal of walking in the hallway on day 1 because of hypotension. Correct action: document the variance, address the cause (assess volume status, notify the provider), and adjust the plan. Why: variance tracking finds client and system problems early.
- Thinking the primary nurse works 24 hours a day — the primary nurse is accountable 24 hours a day but works a normal schedule; associate nurses give care in between.
- Calling functional nursing "patient-centered" — it is task-centered.
- Confusing team nursing (RN-led nursing team) with an interdisciplinary team (nurses, physicians, therapists, social workers).
- Assuming modular nursing is a different philosophy from team nursing — it is team nursing organized by geography.
- Thinking the case manager must give the direct care — the case manager coordinates across the continuum.
- Listing preceptorship as a care delivery model — it is an orientation and teaching strategy.
- Delegating assessment, teaching that requires nursing judgment, or evaluation of an unstable client to assistive personnel because "the model assigns tasks."
- Total patient care = one nurse, all care for the shift; oldest model; common in ICUs; costly.
- Functional = task-based; efficient and cheap; fragmented; unclear accountability.
- Team = RN team leader directs mixed-skill team; success depends on leader and communication.
- Modular = small team assigned to a geographic area.
- Primary = one RN accountable 24 hours a day from admission to discharge; associate nurses follow the plan.
- Case management = coordinating quality and cost across the continuum using clinical pathways; document variances.
- Assignments: new, unstable, or unpredictable clients go to the RN.
- RN never delegates assessment, care planning, teaching that requires nursing judgment, or evaluation.
- Choose the model by client acuity, staff mix, budget, layout, and state law.
- Staffing ratio laws apply regardless of the delivery model.