Residency · Residency · Geriatrics

Perioperative Management of the Geriatric Patient

Introduction

Adults aged 65 and older account for 40 percent of all surgical procedures and 50 percent of emergency operations in the United States, making perioperative management of elderly patients one of the most consequential areas of geriatric medicine. Perioperative mortality increases exponentially with age, ranging from 1 to 2 percent at ages 65 to 74, to 3 to 5 percent at ages 75 to 84, and reaching 5 to 10 percent at age 85 and beyond. However, age alone is a poor predictor of surgical outcomes; frailty, functional status, and comorbidity burden are far stronger predictors of postoperative complications and mortality. Preoperative Comprehensive Geriatric Assessment (CGA) has been demonstrated to reduce postoperative complications by 20 to 30 percent and delirium by 40 to 50 percent, establishing it as the most impactful perioperative intervention available. The geriatrician's role in the perioperative setting is to optimize modifiable risk factors, guide shared decision-making regarding the appropriateness of surgery, and prevent geriatric syndromes throughout the perioperative period.

Preoperative Assessment

Risk Stratification Beyond Age

Frailty assessment is the strongest predictor of surgical outcomes and should be performed before every surgical decision. The Modified Frailty Index-11 (mFI-11), with a score of 0.27 or greater, confers a two- to three-fold increased risk of 30-day mortality and complications. The Clinical Frailty Scale (CFS), with a score of 5 or greater, indicates significantly increased surgical risk. The Fried frailty phenotype identifies patients meeting three or more criteria as frail. Five-meter gait speed below 0.8 m/s independently predicts postoperative complications across surgical specialties.

Functional status, as measured by independence in activities of daily living and instrumental activities of daily living, is a strong predictor of recovery potential. The Duke Activity Status Index (DASI) estimates metabolic equivalents (METs), with functional capacity below 4 METs indicating increased cardiac risk. The inability to climb two flights of stairs is a practical bedside indicator of poor functional capacity. Cognitive assessment with the Mini-Cog or Montreal Cognitive Assessment (MoCA) should be performed preoperatively because preoperative cognitive impairment predicts postoperative delirium with an odds ratio of 2 to 5, and establishing a baseline is essential for postoperative comparison. Nutritional status assessment is critical, as malnutrition (indicated by albumin below 3.0 g/dL, weight loss exceeding 10 percent, or MNA score of 7 or below) increases surgical complications two- to four-fold. Social support assessment must address the adequacy of the postoperative care plan and identify who will assist during recovery.

ACS NSQIP/AGS Best Practice Guidelines for Geriatric Surgery

The American College of Surgeons National Surgical Quality Improvement Program and the American Geriatrics Society have jointly published best practice guidelines specifying that the preoperative assessment of elderly surgical patients should include a cognitive screen, depression screen (using the PHQ-2 or Geriatric Depression Scale), frailty screen, functional status assessment, falls risk assessment, nutritional assessment, medication reconciliation with specific attention to anticholinergic burden and polypharmacy, documentation of goals of care and advance directives, and assessment of patient expectations for surgical outcome.

Cardiac Risk Assessment

The ACC/AHA guidelines for perioperative cardiovascular evaluation apply to elderly patients with geriatric-specific considerations. The Revised Cardiac Risk Index (RCRI, also known as the Lee Index) incorporates six predictors: high-risk surgery, coronary artery disease, congestive heart failure, cerebrovascular disease, insulin-dependent diabetes mellitus, and creatinine above 2.0 mg/dL. Two or more risk factors indicate elevated cardiac risk. If functional capacity is 4 METs or greater (the patient can climb stairs and walk briskly) without symptoms, surgery can generally proceed without additional cardiac testing. Preoperative cardiac testing with stress testing or echocardiography should be performed only if results would change management. Coronary revascularization is rarely indicated preoperatively, as the CARP trial demonstrated that it does not improve outcomes in patients with stable coronary artery disease. Regarding perioperative beta-blockers, the POISE trial established that de novo initiation of beta-blockers perioperatively should be avoided, as it reduced myocardial infarction but increased stroke and overall mortality. Chronic cardiovascular medications including beta-blockers and statins should be continued perioperatively, while ACE inhibitors and ARBs should be held on the morning of surgery due to the risk of intraoperative hypotension.

Pulmonary Risk Assessment

The ARISCAT score predicts postoperative pulmonary complications based on risk factors including age 80 years or older, oxygen saturation below 96 percent, respiratory infection within one month, anemia, upper abdominal or thoracic surgery, emergency surgery, and surgical duration exceeding two hours. Smoking cessation ideally should begin at least four to eight weeks preoperatively, as this interval reduces pulmonary complications by approximately 50 percent. Preoperative incentive spirometry training familiarizes the patient with the technique before the stress of surgery.

<image>A preoperative assessment checklist infographic for the geriatric surgical patient. Show a patient figure in the center with assessment domains radiating outward in a clock-like arrangement. At 12 o'clock: Cardiac Risk (RCRI, functional capacity in METs, need for stress testing decision tree). At 2: Cognitive Screen (Mini-Cog or MoCA with baseline score documentation). At 4: Frailty Assessment (CFS score, gait speed, grip strength with cut-off values). At 6: Nutritional Status (albumin, BMI, weight loss, MNA with optimization timeline). At 8: Medication Review (anticholinergic burden, perioperative medication management table — hold/continue/bridge). At 10: Goals of Care (advance directives, code status, surgical expectations, what defines a "good outcome" for this patient). Include a central traffic-light risk stratification: GREEN (low risk: robust, independent, no cognitive impairment), YELLOW (moderate risk: pre-frail, some dependency, mild cognitive impairment — optimize then proceed), RED (high risk: frail, dependent, cognitive impairment — careful shared decision-making, consider non-operative alternatives). Include the ACS NSQIP/AGS checklist items along the bottom.</image>

Prehabilitation

Prehabilitation refers to the preoperative optimization of modifiable risk factors before elective surgery and represents a proactive approach to reducing perioperative risk. The components of prehabilitation include exercise, with aerobic and resistance training for two to four weeks preoperatively to improve functional capacity and facilitate postoperative recovery; nutritional optimization through protein loading at 1.2 to 1.5 g/kg/day, oral nutritional supplements, and correction of vitamin D deficiency; cognitive preparation including education about the expected perioperative course and delirium prevention strategies; anemia correction through iron supplementation, erythropoietin in select cases, and preoperative autologous blood donation; smoking cessation at least four weeks before surgery; and psychological preparation encompassing anxiety reduction and expectations management.

The POPS trial (Proactive Care of Older People Undergoing Surgery) demonstrated that CGA-based preoperative optimization reduced postoperative medical complications and length of stay. Prehabilitation has the strongest evidence in colorectal, cardiac, and orthopedic surgery, though the principles are applicable across surgical specialties.

Intraoperative Considerations

Anesthesia

No clear advantage of general versus regional anesthesia has been demonstrated for delirium or mortality outcomes in hip fracture patients, as demonstrated by the RAGA and REGAIN trials, which found no difference in delirium rates between anesthetic techniques. Regional anesthesia does offer advantages including reduced opioid use, earlier mobilization, and potentially fewer pulmonary complications. Depth of anesthesia monitoring using bispectral index (BIS) may reduce delirium, though the evidence remains inconclusive (the ENGAGES trial was inconclusive, while earlier studies were suggestive of benefit). Medications known to increase delirium risk, including benzodiazepines (particularly midazolam), meperidine, anticholinergics, and ketamine bolus, should be avoided intraoperatively. Active warming is essential, as hypothermia increases the risk of infection, bleeding, and cardiac events. Fluid management should follow goal-directed principles to reduce complications, avoiding both hypovolemia and fluid overload.

Surgical Considerations

Minimally invasive surgical approaches should be employed when feasible, as they reduce physiological stress and accelerate recovery. Surgical duration is an independent risk factor, with each additional hour of surgery increasing complication risk. For hip fractures, surgery should be performed within 24 to 48 hours of admission, as delay beyond 48 hours increases mortality (odds ratio 1.4) and complications. The ACS/AGS guidelines for optimal hip fracture care recommend surgery within 24 hours when the patient is medically optimized.

Postoperative Geriatric Syndromes

Delirium Prevention (Most Important Postoperative Priority)

Postoperative delirium occurs in 15 to 53 percent of elderly surgical patients, with the highest rates following hip fracture and cardiac surgery. Prevention strategies adapted from the Hospital Elder Life Program (HELP) include reorientation and cognitive stimulation, sleep promotion through minimizing nighttime interruptions and providing earplugs and eye masks, early mobilization with the goal of getting the patient out of bed on postoperative day 0 or 1 when surgically appropriate, sensory optimization by ensuring glasses and hearing aids are available immediately after surgery, maintaining adequate hydration and nutrition, multimodal pain management with minimization of opioid use, and medication review to avoid anticholinergics, benzodiazepines, and meperidine. Proactive geriatrics consultation reduces postoperative delirium by 36 percent, as demonstrated by Marcantonio and colleagues in 2001 in a randomized trial of hip fracture patients.

Pain Management

Multimodal analgesia is the standard of care for postoperative pain management in elderly patients. Acetaminophen should be prescribed on a scheduled basis at 1 gram every 6 to 8 hours as the first-line analgesic, with the maximum dose reduced to 2 grams per day in frail elderly patients or those with hepatic impairment. Regional anesthesia, particularly femoral or fascia iliaca nerve blocks for hip fracture, reduces opioid use by 50 percent and significantly decreases delirium incidence. Short-term, low-dose NSAIDs may be used with caution, avoiding them in patients with chronic kidney disease, heart failure, gastrointestinal bleeding risk, or concurrent anticoagulation. Gabapentin or pregabalin may serve as adjunctive agents for neuropathic pain components, with dose reduction and sedation monitoring in elderly patients. Opioids should be used as rescue medications at the lowest effective dose for the shortest duration, avoiding meperidine and long-acting formulations. Preferred opioid agents include oxycodone 2.5 mg, hydromorphone 0.5 mg, and morphine 2 mg, with the caveat that morphine should be avoided in chronic kidney disease due to active metabolite accumulation. Low-dose intravenous ketamine at 0.1 to 0.3 mg/kg/hr may serve as an adjunct in opioid-sparing protocols. Pain should be assessed using appropriate scales: the Numeric Rating Scale for verbal patients and the PAINAD or Abbey Pain Scale for non-verbal or demented patients.

Early Mobilization

Getting the patient out of bed within 24 hours of surgery, or sooner when surgically appropriate, is a non-negotiable priority. Prolonged bed rest causes 1 to 5 percent muscle mass loss per day, and deconditioning accelerates rapidly in elderly patients. Physical therapy consultation should occur on the day of surgery or postoperative day 1. Early mobilization reduces the incidence of delirium, deep vein thrombosis and pulmonary embolism, pneumonia, pressure injuries, functional decline, and length of stay.

Venous Thromboembolism Prophylaxis

Venous thromboembolism prophylaxis should follow ACCP/CHEST guidelines adjusted for individual bleeding risk. Mechanical prophylaxis with intermittent pneumatic compression devices should be used for all patients, with graduated compression stockings as an adjunct. Pharmacological prophylaxis options include low-molecular-weight heparin (enoxaparin 40 mg subcutaneously daily) or fondaparinux 2.5 mg subcutaneously daily, with direct oral anticoagulants appropriate for some orthopedic indications. Extended prophylaxis for 28 to 35 days total is recommended after major orthopedic surgery. The balance between thrombotic and bleeding risk must be assessed individually, as elderly patients are at increased risk for both.

Nutrition

Early resumption of oral intake within 24 hours when possible supports recovery and reduces complications. A protein-rich diet providing 1.2 to 1.5 g/kg/day supports surgical wound healing and tissue repair. Oral nutritional supplements reduce complications and mortality in hip fracture patients, as demonstrated in a Cochrane review showing reduced unfavorable outcomes. Patients should be monitored for dysphagia following extubation, particularly after prolonged intubation.

<image>A postoperative care timeline for the geriatric surgical patient showing key interventions organized by postoperative day. Create a horizontal timeline from POD 0 to Discharge. POD 0: immediate recovery — pain assessment (PAINAD scale shown), delirium screening (CAM), IV fluids, antiemetics, reorientation, ensure glasses/hearing aids, VTE prophylaxis initiation, sensory optimization. POD 1: mobilization (out of bed to chair, then ambulate with PT), advance diet (protein-rich meals + ONS), delirium prevention protocol, medication reconciliation, remove urinary catheter if present. POD 2-3: progressive mobilization, OT assessment (ADL function), continue delirium monitoring, bowel regimen, transition to oral analgesics (multimodal). Pre-discharge: functional assessment (can patient do stairs, transfers, ADLs needed for discharge disposition?), medication reconciliation (compare to preadmission list, identify new medications needed, deprescribe where possible), fall risk assessment, follow-up appointments scheduled, caregiver education. Show key geriatric complications to monitor at each stage as red warning flags: delirium (POD 0-3), urinary retention (POD 0-1), falls (POD 1+), malnutrition (throughout), constipation (POD 2+), VTE (throughout).</image>

Specific Surgical Populations

Hip Fracture

Hip fracture is the most common reason for geriatric surgical admission and serves as a paradigm for geriatric perioperative care. Time to surgery is critical: less than 24 hours is optimal, less than 48 hours is acceptable, and delays beyond this threshold increase mortality. Geriatrics co-management of hip fracture patients reduces mortality (odds ratio 0.60), delirium (odds ratio 0.64), and length of stay by approximately two days. Fascia iliaca blocks performed in the emergency department reduce pain, opioid use, and delirium risk preoperatively and should be considered standard care. Postoperatively, weight-bearing as tolerated is appropriate for most fixation types, and early mobilization is critical for recovery. Osteoporosis assessment and treatment initiation before discharge represents an essential but frequently missed opportunity, as the treatment gap for secondary fracture prevention remains enormous.

Emergency Surgery

Emergency surgery in elderly patients carries three- to five-fold higher mortality than elective surgery, with limited time available for optimization. Rapid assessment is essential, and the Clinical Frailty Scale can be completed in approximately 30 seconds to inform goals-of-care discussions. Advance directive discussions should be conducted preoperatively when time permits, as even brief goals-of-care conversations improve outcomes and ensure that the surgical plan aligns with the patient's values.

Elective Surgery

Elective surgery provides the opportunity for full preoperative optimization and prehabilitation. Shared decision-making is essential, with explicit discussion of risks, benefits, alternatives, and what recovery realistically entails. The clinician should help the patient consider the fundamental question: "Will this surgery help the patient achieve what matters most to them?"

Shared Decision-Making and Goals of Care

Preoperative goals-of-care discussion is essential for all high-risk geriatric surgical patients. Elements to discuss include what the patient hopes to gain from surgery, what outcome would be unacceptable, willingness to undergo ICU care, intubation and ventilation, and CPR, and disposition planning including the likely need for rehabilitation and the potential for not returning home. The "best case/worst case" framework, developed by Kruser and colleagues, provides a practical method for describing realistic scenarios to aid decision-making. Advance directives should be documented and code status clarified preoperatively, with intraoperative code status discussed specifically with the surgeon and anesthesiologist.

Key Clinical Pearls

• Frailty (not age) is the strongest predictor of surgical outcomes — assess frailty before every surgical decision
• Preoperative CGA with geriatrics co-management reduces delirium by 36% and complications by 20-30% — it is the single most impactful perioperative intervention
• Fascia iliaca blocks for hip fracture reduce opioid use by 50% and significantly reduce delirium — they should be performed in the ED before admission
• Operate on hip fractures within 24 hours — every hour of delay increases complications
• Multimodal analgesia (acetaminophen + regional blocks + low-dose opioids) is the standard of care — avoid meperidine, benzodiazepines, and diphenhydramine in elderly surgical patients
• Early mobilization (POD 0-1) is non-negotiable — every day of bed rest costs 1-5% of muscle mass and dramatically increases complication risk
• Always start osteoporosis treatment before discharging a hip fracture patient — the "treatment gap" represents a massive missed prevention opportunity

References

1. Mohanty S, Rosenthal RA, Russell MM, et al. Optimal perioperative management of the geriatric patient: a best practices guideline from the ACS NSQIP/AGS. J Am Coll Surg. 2016;222(5):930-947.
2. Marcantonio ER, Flacker JM, Wright RJ, Resnick NM. Reducing delirium after hip fracture: a randomized trial. J Am Geriatr Soc. 2001;49(5):516-522.
3. Neuman MD, Feng R, Carson JL, et al. Spinal anesthesia or general anesthesia for hip surgery in older adults. N Engl J Med. 2021;385(22):2025-2035.
4. Berian JR, Mohanty S, Ko CY, Rosenthal RA, Robinson TN. Association of loss of independence with readmission and death after discharge in older patients after surgical procedures. JAMA Surg. 2016;151(9):e161689.
5. Grigoryan KV, Javedan H, Rudolph JL. Orthogeriatric care models and outcomes in hip fracture patients: a systematic review and meta-analysis. J Orthop Trauma. 2014;28(3):e49-e55.

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