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Study Overview
Objective. The objective of this study was to evaluate orders and documentation describing perioperative management of code status in adults.
Design. A retrospective case series of all adult inpatients admitted to hospitals at 1 academic health system in the US.
Setting and participants. This retrospective case series was conducted at 5 hospitals within the University of Pennsylvania Health System. Cases included all adult inpatients admitted to hospitals between March 2017 and September 2018 who had a Do-Not-Resuscitate (DNR) order placed in their medical record during admission and subsequently underwent a surgical procedure that required anesthesia care.
Main outcome measures. Medical records of included cases were manually reviewed by the authors to verify whether a DNR order was in place at the time surgical intervention was discussed with a patient. Clinical notes and DNR orders of eligible cases were reviewed to identify documentation and outcome of goals of care discussions that were conducted within 48 hours prior to the surgical procedure. Collected data included patient demographics (age, sex, race); case characteristics (American Society of Anesthesiologists [ASA] physical status score, anesthesia type [general vs others such as regional], emergency status [emergent vs elective surgery], procedures by service [surgical including hip fracture repair, gastrostomy or jejunostomy, or exploratory laparotomy vs medical including endoscopy, bronchoscopy, or transesophageal echocardiogram]); and hospital policy for perioperative management of DNR orders (written policy encouraging discussion vs written policy plus additional initiatives, including procedure-specific DNR form). The primary outcome was the presence of a preoperative order or note documenting code status discussion or change. Data were analyzed using χ2 and Fisher exact tests and the threshold for statistical significance was P < .05.
Main results. Of the 27 665 inpatient procedures identified across 5 hospitals, 444 (1.6%) cases met the inclusion criteria. Patients from these cases aged 75 (SD 13) years (95% CI, 72-77 years); 247 (56%, 95% CI, 55%-57%) were women; and 300 (68%, 95% CI, 65%-71%) were White. A total of 426 patients (96%, 95% CI, 90%-100%) had an ASA physical status score of 3 or higher and 237 (53%, 95% CI, 51%-56%) received general anesthesia. The most common procedures performed were endoscopy (148 [33%]), hip fracture repair (43 [10%]), and gastrostomy or jejunostomy (28 [6%]). Reevaluation of code status was documented in 126 cases (28%, 95% CI, 25%-31%); code status orders were changed in 20 of 126 cases (16%, 95% CI, 7%-24%); and a note was filed without a corresponding order for 106 of 126 cases (84%, 95% CI, 75%-95%). In the majority of cases (109 of 126 [87%], 95% CI, 78%-95%) in which documented discussion occurred, DNR orders were suspended. Of 126 cases in which a discussion was documented, participants of these discussions included surgeons 10% of the time (13 cases, 95% CI, 8%-13%), members of the anesthesia team 51% of the time (64 cases, 95% CI, 49%-53%), and medicine or palliative care clinicians 39% of the time (49 cases, 95% CI, 37%-41%).
The rate of documented preoperative code status discussion was higher in patients with higher ASA physical status score (35% in patients with an ASA physical status score ≥ 4 [55 of 155] vs 25% in those with an ASA physical status score ≤ 3 [71 of 289]; P = .02). The rates of documented preoperative code status discussion were similar by anesthesia type (29% for general anesthesia [69 of 237 cases] vs 28% [57 of 207 cases] for other modalities; P = .70). The hospitals involved in this study all had a written policy encouraging rediscussion of code status before surgery. However, only 1 hospital reported added measures (eg, provision of a procedure-specific DNR form) to increase documentation of preoperative code status discussions. In this specific hospital, documentation of preoperative code status discussions was higher compared to other hospitals (67% [37 of 55 cases] vs 23% [89 of 389 cases]; P < .01).
Conclusion. In a retrospective case series conducted at 5 hospitals within 1 academic health system in the US, fewer than 1 in 5 patients with preexisting DNR orders had a documented discussion of code status prior to undergoing surgery. Additional strategies including the development of institutional protocols that facilitate perioperative management of advance directives, identification of local champions, and patient education, should be explored as means to improve preoperative code status reevaulation per guideline recommendations.
Commentary
It is not unusual that patients with a DNR order may require and undergo surgical interventions to treat reversible conditions, prevent progression of underlying disease, or mitigate distressing symptoms such as pain. For instance, intubation, mechanical ventilation, and administration of vasoactive drugs are resuscitative measures that may be needed to safely anesthetize and sedate a patient. As such, the American College of Surgeons1 has provided a statement on advance directives by patients with an existing DNR order to guide management. Specifically, the statement indicates that the best approach for these patients is a policy of “required reconsideration” of the existing DNR order. Required reconsideration means that “the patient or designated surrogate and the physicians who will be responsible for the patient’s care should, when possible, discuss the new intraoperative and perioperative risks associated with the surgical procedure, the patient’s treatment goals, and an approach for potentially life-threatening problems consistent with the patient’s values and preferences.” Moreover, the required reconsideration discussion needs to occur as early as it is practical once a decision is made to have surgery because the discussion “may result in the patient agreeing to suspend the DNR order during surgery and the perioperative period, retaining the original DNR order, or modifying the DNR order.” Given that surgical patients with DNR orders have significant comorbidities, many sustain postoperative complications, and nearly 1 in 4 die within 30 days of surgery, preoperative advance care planning (ACP) and code status discussions are particularly essential to delivering high quality surgical care.2
In the current study, Hadler et al3 conducted a retrospective analysis to evaluate orders and documentation describing perioperative management of code status in patients with existing DNR order at an academic health system in the US. The authors reported that fewer than 20% of patients with existing DNR orders had a documented discussion of code status prior to undergoing surgery. These findings add to the notion that compliance with such guidance on required reconsideration discussion is suboptimal in perioperative care in the US.4,5 A recently published study focused on patients aged more than 60 years undergoing high-risk oncologic or vascular surgeries similarly showed that the frequency of ACP discussions or advance directive documentations among older patients was low.6 This growing body of evidence is highly clinically relevant in that preoperative discussion on code status is highly relevant to the care of older adults, a population group that accounts for the majority of surgeries and is most vulnerable to poor surgical outcomes. Additionally, it highlights a disconnect between the shared recognition by surgeons and patients that ACP discussion is important in perioperative care and its low implementation rates.
Unsurprisingly, Hadler et al3 reported that added measures such as the provision of a procedure-specific DNR form led to an increase in the documentation of preoperative code status discussions in 1 of the hospitals studied. The authors suggested that strategies such as the development of institutional protocols aimed to facilitate perioperative advance directive discussions, identify local champions, and educate patients may be ways to improve preoperative code status reevaulation. The idea that institutional value and culture are key factors impacting surgeon behavior and may influence the practice of ACP discussion is not new. Thus, creative and adaptable strategies, resources, and trainings that are required by medical institutions and hospitals to support preoperative ACP discussions with patients undergoing surgeries need to be identified, validated, and implemented to optimize perioperative care in vulnerable patients.
Applications for Clinical Practice
The findings from the current study indicate that less than 20% of patients with preexisting DNR orders have a documented discussion of code status prior to undergoing surgery. Physicians and health care institutions need to identify barriers to, and implement strategies that, facilitate and optimize preoperative ACP discussions in order to provide patient-centered care in vulnerable surgical patients.
Financial disclosures: None.
1. American College of Surgeons Board of Regents. Statement on Advance Directives by Patients: “Do Not Resuscitate” in the Operating Room. American College of Surgeons. January 3, 2014. Accessed November 6, 2021. https://www.facs.org/about-acs/statements/19-advance-directives
2. Kazaure H, Roman S, Sosa JA. High mortality in surgical patients with do-not-resuscitate orders: analysis of 8256 patients. Arch Surg. 2011;146(8):922-928. doi:10.1001/archsurg.2011.69
3. Hadler RA, Fatuzzo M, Sahota G, Neuman MD. Perioperative Management of Do-Not-Resuscitate Orders at a Large Academic Health System. JAMA Surg. 2021;e214135. doi:10.1001/jamasurg.2021.4135
4. Coopmans VC, Gries CA. CRNA awareness and experience with perioperative DNR orders. AANA J. 2000;68(3):247-256.
5. Urman RD, Lilley EJ, Changala M, Lindvall C, Hepner DL, Bader AM. A Pilot Study to Evaluate Compliance with Guidelines for Preprocedural Reconsideration of Code Status Limitations. J Palliat Med. 2018;21(8):1152-1156. doi:10.1089/jpm.2017.0601
6. Kalbfell E, Kata A, Buffington AS, et al. Frequency of Preoperative Advance Care Planning for Older Adults Undergoing High-risk Surgery: A Secondary Analysis of a Randomized Clinical Trial. JAMA Surg. 2021;156(7):e211521. doi:10.1001/jamasurg.2021.1521
Study Overview
Objective. The objective of this study was to evaluate orders and documentation describing perioperative management of code status in adults.
Design. A retrospective case series of all adult inpatients admitted to hospitals at 1 academic health system in the US.
Setting and participants. This retrospective case series was conducted at 5 hospitals within the University of Pennsylvania Health System. Cases included all adult inpatients admitted to hospitals between March 2017 and September 2018 who had a Do-Not-Resuscitate (DNR) order placed in their medical record during admission and subsequently underwent a surgical procedure that required anesthesia care.
Main outcome measures. Medical records of included cases were manually reviewed by the authors to verify whether a DNR order was in place at the time surgical intervention was discussed with a patient. Clinical notes and DNR orders of eligible cases were reviewed to identify documentation and outcome of goals of care discussions that were conducted within 48 hours prior to the surgical procedure. Collected data included patient demographics (age, sex, race); case characteristics (American Society of Anesthesiologists [ASA] physical status score, anesthesia type [general vs others such as regional], emergency status [emergent vs elective surgery], procedures by service [surgical including hip fracture repair, gastrostomy or jejunostomy, or exploratory laparotomy vs medical including endoscopy, bronchoscopy, or transesophageal echocardiogram]); and hospital policy for perioperative management of DNR orders (written policy encouraging discussion vs written policy plus additional initiatives, including procedure-specific DNR form). The primary outcome was the presence of a preoperative order or note documenting code status discussion or change. Data were analyzed using χ2 and Fisher exact tests and the threshold for statistical significance was P < .05.
Main results. Of the 27 665 inpatient procedures identified across 5 hospitals, 444 (1.6%) cases met the inclusion criteria. Patients from these cases aged 75 (SD 13) years (95% CI, 72-77 years); 247 (56%, 95% CI, 55%-57%) were women; and 300 (68%, 95% CI, 65%-71%) were White. A total of 426 patients (96%, 95% CI, 90%-100%) had an ASA physical status score of 3 or higher and 237 (53%, 95% CI, 51%-56%) received general anesthesia. The most common procedures performed were endoscopy (148 [33%]), hip fracture repair (43 [10%]), and gastrostomy or jejunostomy (28 [6%]). Reevaluation of code status was documented in 126 cases (28%, 95% CI, 25%-31%); code status orders were changed in 20 of 126 cases (16%, 95% CI, 7%-24%); and a note was filed without a corresponding order for 106 of 126 cases (84%, 95% CI, 75%-95%). In the majority of cases (109 of 126 [87%], 95% CI, 78%-95%) in which documented discussion occurred, DNR orders were suspended. Of 126 cases in which a discussion was documented, participants of these discussions included surgeons 10% of the time (13 cases, 95% CI, 8%-13%), members of the anesthesia team 51% of the time (64 cases, 95% CI, 49%-53%), and medicine or palliative care clinicians 39% of the time (49 cases, 95% CI, 37%-41%).
The rate of documented preoperative code status discussion was higher in patients with higher ASA physical status score (35% in patients with an ASA physical status score ≥ 4 [55 of 155] vs 25% in those with an ASA physical status score ≤ 3 [71 of 289]; P = .02). The rates of documented preoperative code status discussion were similar by anesthesia type (29% for general anesthesia [69 of 237 cases] vs 28% [57 of 207 cases] for other modalities; P = .70). The hospitals involved in this study all had a written policy encouraging rediscussion of code status before surgery. However, only 1 hospital reported added measures (eg, provision of a procedure-specific DNR form) to increase documentation of preoperative code status discussions. In this specific hospital, documentation of preoperative code status discussions was higher compared to other hospitals (67% [37 of 55 cases] vs 23% [89 of 389 cases]; P < .01).
Conclusion. In a retrospective case series conducted at 5 hospitals within 1 academic health system in the US, fewer than 1 in 5 patients with preexisting DNR orders had a documented discussion of code status prior to undergoing surgery. Additional strategies including the development of institutional protocols that facilitate perioperative management of advance directives, identification of local champions, and patient education, should be explored as means to improve preoperative code status reevaulation per guideline recommendations.
Commentary
It is not unusual that patients with a DNR order may require and undergo surgical interventions to treat reversible conditions, prevent progression of underlying disease, or mitigate distressing symptoms such as pain. For instance, intubation, mechanical ventilation, and administration of vasoactive drugs are resuscitative measures that may be needed to safely anesthetize and sedate a patient. As such, the American College of Surgeons1 has provided a statement on advance directives by patients with an existing DNR order to guide management. Specifically, the statement indicates that the best approach for these patients is a policy of “required reconsideration” of the existing DNR order. Required reconsideration means that “the patient or designated surrogate and the physicians who will be responsible for the patient’s care should, when possible, discuss the new intraoperative and perioperative risks associated with the surgical procedure, the patient’s treatment goals, and an approach for potentially life-threatening problems consistent with the patient’s values and preferences.” Moreover, the required reconsideration discussion needs to occur as early as it is practical once a decision is made to have surgery because the discussion “may result in the patient agreeing to suspend the DNR order during surgery and the perioperative period, retaining the original DNR order, or modifying the DNR order.” Given that surgical patients with DNR orders have significant comorbidities, many sustain postoperative complications, and nearly 1 in 4 die within 30 days of surgery, preoperative advance care planning (ACP) and code status discussions are particularly essential to delivering high quality surgical care.2
In the current study, Hadler et al3 conducted a retrospective analysis to evaluate orders and documentation describing perioperative management of code status in patients with existing DNR order at an academic health system in the US. The authors reported that fewer than 20% of patients with existing DNR orders had a documented discussion of code status prior to undergoing surgery. These findings add to the notion that compliance with such guidance on required reconsideration discussion is suboptimal in perioperative care in the US.4,5 A recently published study focused on patients aged more than 60 years undergoing high-risk oncologic or vascular surgeries similarly showed that the frequency of ACP discussions or advance directive documentations among older patients was low.6 This growing body of evidence is highly clinically relevant in that preoperative discussion on code status is highly relevant to the care of older adults, a population group that accounts for the majority of surgeries and is most vulnerable to poor surgical outcomes. Additionally, it highlights a disconnect between the shared recognition by surgeons and patients that ACP discussion is important in perioperative care and its low implementation rates.
Unsurprisingly, Hadler et al3 reported that added measures such as the provision of a procedure-specific DNR form led to an increase in the documentation of preoperative code status discussions in 1 of the hospitals studied. The authors suggested that strategies such as the development of institutional protocols aimed to facilitate perioperative advance directive discussions, identify local champions, and educate patients may be ways to improve preoperative code status reevaulation. The idea that institutional value and culture are key factors impacting surgeon behavior and may influence the practice of ACP discussion is not new. Thus, creative and adaptable strategies, resources, and trainings that are required by medical institutions and hospitals to support preoperative ACP discussions with patients undergoing surgeries need to be identified, validated, and implemented to optimize perioperative care in vulnerable patients.
Applications for Clinical Practice
The findings from the current study indicate that less than 20% of patients with preexisting DNR orders have a documented discussion of code status prior to undergoing surgery. Physicians and health care institutions need to identify barriers to, and implement strategies that, facilitate and optimize preoperative ACP discussions in order to provide patient-centered care in vulnerable surgical patients.
Financial disclosures: None.
Study Overview
Objective. The objective of this study was to evaluate orders and documentation describing perioperative management of code status in adults.
Design. A retrospective case series of all adult inpatients admitted to hospitals at 1 academic health system in the US.
Setting and participants. This retrospective case series was conducted at 5 hospitals within the University of Pennsylvania Health System. Cases included all adult inpatients admitted to hospitals between March 2017 and September 2018 who had a Do-Not-Resuscitate (DNR) order placed in their medical record during admission and subsequently underwent a surgical procedure that required anesthesia care.
Main outcome measures. Medical records of included cases were manually reviewed by the authors to verify whether a DNR order was in place at the time surgical intervention was discussed with a patient. Clinical notes and DNR orders of eligible cases were reviewed to identify documentation and outcome of goals of care discussions that were conducted within 48 hours prior to the surgical procedure. Collected data included patient demographics (age, sex, race); case characteristics (American Society of Anesthesiologists [ASA] physical status score, anesthesia type [general vs others such as regional], emergency status [emergent vs elective surgery], procedures by service [surgical including hip fracture repair, gastrostomy or jejunostomy, or exploratory laparotomy vs medical including endoscopy, bronchoscopy, or transesophageal echocardiogram]); and hospital policy for perioperative management of DNR orders (written policy encouraging discussion vs written policy plus additional initiatives, including procedure-specific DNR form). The primary outcome was the presence of a preoperative order or note documenting code status discussion or change. Data were analyzed using χ2 and Fisher exact tests and the threshold for statistical significance was P < .05.
Main results. Of the 27 665 inpatient procedures identified across 5 hospitals, 444 (1.6%) cases met the inclusion criteria. Patients from these cases aged 75 (SD 13) years (95% CI, 72-77 years); 247 (56%, 95% CI, 55%-57%) were women; and 300 (68%, 95% CI, 65%-71%) were White. A total of 426 patients (96%, 95% CI, 90%-100%) had an ASA physical status score of 3 or higher and 237 (53%, 95% CI, 51%-56%) received general anesthesia. The most common procedures performed were endoscopy (148 [33%]), hip fracture repair (43 [10%]), and gastrostomy or jejunostomy (28 [6%]). Reevaluation of code status was documented in 126 cases (28%, 95% CI, 25%-31%); code status orders were changed in 20 of 126 cases (16%, 95% CI, 7%-24%); and a note was filed without a corresponding order for 106 of 126 cases (84%, 95% CI, 75%-95%). In the majority of cases (109 of 126 [87%], 95% CI, 78%-95%) in which documented discussion occurred, DNR orders were suspended. Of 126 cases in which a discussion was documented, participants of these discussions included surgeons 10% of the time (13 cases, 95% CI, 8%-13%), members of the anesthesia team 51% of the time (64 cases, 95% CI, 49%-53%), and medicine or palliative care clinicians 39% of the time (49 cases, 95% CI, 37%-41%).
The rate of documented preoperative code status discussion was higher in patients with higher ASA physical status score (35% in patients with an ASA physical status score ≥ 4 [55 of 155] vs 25% in those with an ASA physical status score ≤ 3 [71 of 289]; P = .02). The rates of documented preoperative code status discussion were similar by anesthesia type (29% for general anesthesia [69 of 237 cases] vs 28% [57 of 207 cases] for other modalities; P = .70). The hospitals involved in this study all had a written policy encouraging rediscussion of code status before surgery. However, only 1 hospital reported added measures (eg, provision of a procedure-specific DNR form) to increase documentation of preoperative code status discussions. In this specific hospital, documentation of preoperative code status discussions was higher compared to other hospitals (67% [37 of 55 cases] vs 23% [89 of 389 cases]; P < .01).
Conclusion. In a retrospective case series conducted at 5 hospitals within 1 academic health system in the US, fewer than 1 in 5 patients with preexisting DNR orders had a documented discussion of code status prior to undergoing surgery. Additional strategies including the development of institutional protocols that facilitate perioperative management of advance directives, identification of local champions, and patient education, should be explored as means to improve preoperative code status reevaulation per guideline recommendations.
Commentary
It is not unusual that patients with a DNR order may require and undergo surgical interventions to treat reversible conditions, prevent progression of underlying disease, or mitigate distressing symptoms such as pain. For instance, intubation, mechanical ventilation, and administration of vasoactive drugs are resuscitative measures that may be needed to safely anesthetize and sedate a patient. As such, the American College of Surgeons1 has provided a statement on advance directives by patients with an existing DNR order to guide management. Specifically, the statement indicates that the best approach for these patients is a policy of “required reconsideration” of the existing DNR order. Required reconsideration means that “the patient or designated surrogate and the physicians who will be responsible for the patient’s care should, when possible, discuss the new intraoperative and perioperative risks associated with the surgical procedure, the patient’s treatment goals, and an approach for potentially life-threatening problems consistent with the patient’s values and preferences.” Moreover, the required reconsideration discussion needs to occur as early as it is practical once a decision is made to have surgery because the discussion “may result in the patient agreeing to suspend the DNR order during surgery and the perioperative period, retaining the original DNR order, or modifying the DNR order.” Given that surgical patients with DNR orders have significant comorbidities, many sustain postoperative complications, and nearly 1 in 4 die within 30 days of surgery, preoperative advance care planning (ACP) and code status discussions are particularly essential to delivering high quality surgical care.2
In the current study, Hadler et al3 conducted a retrospective analysis to evaluate orders and documentation describing perioperative management of code status in patients with existing DNR order at an academic health system in the US. The authors reported that fewer than 20% of patients with existing DNR orders had a documented discussion of code status prior to undergoing surgery. These findings add to the notion that compliance with such guidance on required reconsideration discussion is suboptimal in perioperative care in the US.4,5 A recently published study focused on patients aged more than 60 years undergoing high-risk oncologic or vascular surgeries similarly showed that the frequency of ACP discussions or advance directive documentations among older patients was low.6 This growing body of evidence is highly clinically relevant in that preoperative discussion on code status is highly relevant to the care of older adults, a population group that accounts for the majority of surgeries and is most vulnerable to poor surgical outcomes. Additionally, it highlights a disconnect between the shared recognition by surgeons and patients that ACP discussion is important in perioperative care and its low implementation rates.
Unsurprisingly, Hadler et al3 reported that added measures such as the provision of a procedure-specific DNR form led to an increase in the documentation of preoperative code status discussions in 1 of the hospitals studied. The authors suggested that strategies such as the development of institutional protocols aimed to facilitate perioperative advance directive discussions, identify local champions, and educate patients may be ways to improve preoperative code status reevaulation. The idea that institutional value and culture are key factors impacting surgeon behavior and may influence the practice of ACP discussion is not new. Thus, creative and adaptable strategies, resources, and trainings that are required by medical institutions and hospitals to support preoperative ACP discussions with patients undergoing surgeries need to be identified, validated, and implemented to optimize perioperative care in vulnerable patients.
Applications for Clinical Practice
The findings from the current study indicate that less than 20% of patients with preexisting DNR orders have a documented discussion of code status prior to undergoing surgery. Physicians and health care institutions need to identify barriers to, and implement strategies that, facilitate and optimize preoperative ACP discussions in order to provide patient-centered care in vulnerable surgical patients.
Financial disclosures: None.
1. American College of Surgeons Board of Regents. Statement on Advance Directives by Patients: “Do Not Resuscitate” in the Operating Room. American College of Surgeons. January 3, 2014. Accessed November 6, 2021. https://www.facs.org/about-acs/statements/19-advance-directives
2. Kazaure H, Roman S, Sosa JA. High mortality in surgical patients with do-not-resuscitate orders: analysis of 8256 patients. Arch Surg. 2011;146(8):922-928. doi:10.1001/archsurg.2011.69
3. Hadler RA, Fatuzzo M, Sahota G, Neuman MD. Perioperative Management of Do-Not-Resuscitate Orders at a Large Academic Health System. JAMA Surg. 2021;e214135. doi:10.1001/jamasurg.2021.4135
4. Coopmans VC, Gries CA. CRNA awareness and experience with perioperative DNR orders. AANA J. 2000;68(3):247-256.
5. Urman RD, Lilley EJ, Changala M, Lindvall C, Hepner DL, Bader AM. A Pilot Study to Evaluate Compliance with Guidelines for Preprocedural Reconsideration of Code Status Limitations. J Palliat Med. 2018;21(8):1152-1156. doi:10.1089/jpm.2017.0601
6. Kalbfell E, Kata A, Buffington AS, et al. Frequency of Preoperative Advance Care Planning for Older Adults Undergoing High-risk Surgery: A Secondary Analysis of a Randomized Clinical Trial. JAMA Surg. 2021;156(7):e211521. doi:10.1001/jamasurg.2021.1521
1. American College of Surgeons Board of Regents. Statement on Advance Directives by Patients: “Do Not Resuscitate” in the Operating Room. American College of Surgeons. January 3, 2014. Accessed November 6, 2021. https://www.facs.org/about-acs/statements/19-advance-directives
2. Kazaure H, Roman S, Sosa JA. High mortality in surgical patients with do-not-resuscitate orders: analysis of 8256 patients. Arch Surg. 2011;146(8):922-928. doi:10.1001/archsurg.2011.69
3. Hadler RA, Fatuzzo M, Sahota G, Neuman MD. Perioperative Management of Do-Not-Resuscitate Orders at a Large Academic Health System. JAMA Surg. 2021;e214135. doi:10.1001/jamasurg.2021.4135
4. Coopmans VC, Gries CA. CRNA awareness and experience with perioperative DNR orders. AANA J. 2000;68(3):247-256.
5. Urman RD, Lilley EJ, Changala M, Lindvall C, Hepner DL, Bader AM. A Pilot Study to Evaluate Compliance with Guidelines for Preprocedural Reconsideration of Code Status Limitations. J Palliat Med. 2018;21(8):1152-1156. doi:10.1089/jpm.2017.0601
6. Kalbfell E, Kata A, Buffington AS, et al. Frequency of Preoperative Advance Care Planning for Older Adults Undergoing High-risk Surgery: A Secondary Analysis of a Randomized Clinical Trial. JAMA Surg. 2021;156(7):e211521. doi:10.1001/jamasurg.2021.1521