Session 7: Tumor, amputation and Infection
16. November
09:30 - 11:00
Lokale: 102-105
Chair: Tine Nymark and Klaus K Petersen
54. Bone and soft tissue concentrations of penicillin - is oral penicillin V non-inferior to intravenous penicillin G?
Hans Christian Rasmussen1, Maiken Stilling1,2, Johanne Lilleøre1, Elisabeth Petersen1, Magnus Hvistendahl1, Andrea Jørgensen1, Pelle Hanberg1,3, Mats Bue1,2
1. Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research
Laboratory, Aarhus University Hospital;
2. Dept. of Orthopaedics, Aarhus University Hospital;
3. Dept. of Head and Neck Surgery, Aarhus University Hospital.
Background: The ß-lactam penicillin is often used in the treatment of soft tissue infections and osteomyelitis
caused by penicillin susceptible Staph. aureus. Oral antibiotic treatment has been shown to be
non-inferior to intravenous (IV) therapy when used during the first 6 weeks in complex
orthopaedic infections (OVIVAtrial). However, the use of oral ß-lactams in osteomyelitis
treatment remains a topic of debate due to low and variable bioavailability.
Aim: Assess the time for which the unbound penicillin concentration
exceeded targeted minimum inhibitory concentrations (fT>MIC)
in cancellous bone and subcutaneous tissue after IV (penicillin
G) and oral (penicillin V) treatment in a porcine microdialysis
model.
Materials and Methods: 12 pigs (75kg) were assigned to standard clinical regimens
of either three doses of IV penicillin G (1.2g) or oral penicillin
V (0.8g) every 6h over 18h. Microdialysis catheters were
placed for sampling in tibial cancellous bone and adjacent
subcutaneous tissue. Data was collected in the first dosing
interval (0-6h; prophylactic situation) and the third dosing
interval (12-18h; assumed steady state). Plasma samples
were collected for reference. MIC targets of 0.125µg/mL (S.
aureus breakpoint), 0.25µg/mL (Strep. Group A, B, C and G
breakpoint) and 0.5µg/mL (4xMIC) were applied.
Results: For all MIC targets, IV penicillin G resulted in a longer mean fT>MIC in cancellous bone during the first dosing
interval, and in both cancellous bone and subcutaneous tissue during the third dosing interval compared to oral
penicillin V. Across compartments, mean fT>MIC for IV penicillin G (MIC: 0.125, 0.25 and 0.5µg/mL) were =97%,
=84% and =75% during the first dosing interval, and 100%, =95% and =88%, during the third dosing interval. The
mean fT>MIC for oral penicillin V were =40%, =24% and =7% during the first dosing interval, and =42%, =36%
and =18% during the third dosing interval.
Interpretation / Conclusion: The findings suggest that standard clinical
dosing of IV penicillin G provides superior
fT>MIC in cancellous bone and subcutaneous
tissue compared to oral penicillin V, particularly
in the third dosing interval. This emphasizes the
importance of appropriate route of
administration when applying penicillin
treatment.
55. Comparative Effectiveness on the Use of Antibiotic Prophylaxis and Serious Adverse Events Following Primary Total Hip Arthroplasty (THA): A Systematic Review and Network Meta-Analysis of Randomized Trials
Armita Armina Abedi1,2,3, Jacob Moflag Svensson1, Alma Becic Pedersen4,5, Claus Varnum 6,7, Sabrina Mai Nielsen 3,8, Jens Holm Laigaard1,2, Robin Christensen3,8, Søren Overgaard1,2
1. Department of Orthopedic Surgery and Traumatology, Copenhagen University
Hospital, Bispebjerg, Denmark;
2. Department of Clinical Medicine, Faculty of Health and Medical Sciences,
University of Copenhagen, Denmark;
3. Section for Biostatistics and Evidence-Based Research, the Parker Institute,
Bispebjerg and Frederiksberg Hospital, Denmark;
4. Department of Clinical Epidemiology, Aarhus University Hospital, Denmark;
5. Department of Clinical Medicine, Aarhus University, Denmark;
6. Department of Orthopedics, Lillebaelt Hospital, Vejle, Denmark;
7. Department of Regional Health Research, University of Southern Denmark,
Denmark;
8. Research Unit of Rheumatology, Department of Clinical Research, University
of Southern Denmark, Odense University Hospital, Denmark.
Background: Perioperative antibiotic prophylaxis (AB) is a
routine in THA to reduce the risk of surgical site
infections. However, it remains unclear whether
there exists a superior AB practice approach in
prevention of postoperative serious adverse
events (SAEs).
Aim: To compare the relative effectiveness of different
AB prophylaxis approaches in prevention of
SAEs up to one year after the THA.
Materials and Methods: The study was designed as a systematic
review and network meta-analysis of
randomized trials (RCT). Data sources were
MEDLINE, EMBASE and Cochrane Library to
identify RCTs that examined the effect of AB
prophylaxis in patients = 18 years, receiving
primary THA. SAE was defined as a
composite of prosthetic joint infections, other
serious infections, major cardiovascular
events, venous thromboembolisms, and
mortality. Our network meta-analysis was
based on mixed-effects logistic regression.
The odds ratio (OR) with 95% confidence
interval was the primary measure of
association.
Results: We screened 6,221 records for eligibility and
included 10 trials (9,130 patients) for analysis.
Trial arms were divided into five groups:
placebo (3), single-dose (3), multiple doses
up to 24 hours (6), and multiple doses >1 day
(6), and AB cementation practice (2).
Compared to placebo, all AB prophylaxis
practices were superior in reducing the odds
of having an SAE up to 1 year after surgery:
OR (single-dose) = 0.16 (0.03 – 0.71), OR
(multiple doses up to 24 hours) = 0.13 (0.03 –
0.48), OR (multiple doses >1 day) = 0.22
(0.07 – 0.71) and OR (AB cementation) =
0.06 (0.01 – 0.36). There was no evidence
suggesting that a single-dose AB was inferior
to multiple doses up to 24 hours (OR = 1.22
(0.40 – 3.70)) nor multiple doses >1 day (OR
= 0.70 (0.19 – 2.54)). Furtheremore, there
was no evidence suggesting that AB practice
with multiple doses up to 24 hours was
inferior to multiple doses >1 day, (OR=0.58
(0.20 – 1.67)).
Interpretation / Conclusion: Evidence from RCTs show that AB is effective in
prevention of SAEs up to 1 year after THA.
However, we could not confirm that any specific
AB regime was superior. Thus, there is currently
no evidence to suggest a preferable AB strategy.
56. Necrotizing Soft Tissue Infection – a descriptive study of 109 cases
Rehne Lessmann Hansen1, Anette Marianne Fedder2, Hans Michael Betsch3, Karen Rokkedal Lausch4, Mette Holm5, Rikke Bek Helmig6, Mikala Wang7, Peter Christensen8, Per Hviid Gundtoft11, Klaus Kjær Petersen1
1: Department of Orthopaedic Surgery, Aarhus University Hospital
2: Department of Emergency Medicine, Aarhus University Hospital
3: Department of Intensive Care Medicine, Aarhus University Hospital
4: Department of Infectious Diseases, Aarhus University Hospital
5: Department of Pediatrics and Adolescent Medicine, Aarhus University Hospital
6: Department of Obstetrics and Gynaecology, Aarhus University Hospital
7: Department of Clinical Microbiology, Aarhus University Hospital
8: Department of Surgery, Aarhus University Hospital
Background: Necrotizing Soft Tissue Infection (NSTI) is a
rapidly progressing and potentially life-
threatening soft tissue infection. Early diagnosis
and prompt surgical intervention are crucial for
improving patient outcomes.
Aim: To evaluate the impact of implementing a
local/regional guideline for the treatment of NSTI.
Materials and Methods: At Aarhus University Hospital (AUH), a guideline
for treating NSTI was introduced in 2020. A
retrospective analysis of patients treated for
NSTI at AUH from 2015 to 2020 (retro-group
n=65) was conducted. From 2020 to 2023 data
was collected prospectively in a local database
(pro-group n=44). Clinical, laboratory, and
surgical data were collected and analyzed using
the electronic medical record.
Results: A total of 109 patients (61 men, 48 women)
with a mean age of 61 years (SD 15.2) were
included. Diabetes was the most frequent
comorbidity (32%), followed by liver disease
(6%) and cancer (8%). At the time of
admission, the median CRP was 298.5 mg/L
(IQR 187 to 389), leukocyte count 15.2 ×
10^9/L (IQR 11.9 to 21), creatinine 110 µmol/L
(IQR 75 to 155), and lactate levels were 2.45
mmol/L (IQR 1.3 to 4.2). 48% of the patients
received pre-operative CT-scans, with no
difference between the groups (p=0.72)
The median time from suspicion of NSTI to
surgical intervention was 90 minutes (IQR 35
to 209 minutes) in the retro-group and 79
minutes (IQR 54 to 137) in the pro-group
(p=0.9)
The most common bacteria isolated from
tissue-samples were S. aureus, S. pyogenes,
and Peptostreptococcus sp.
95% of patients were treated at the intensive
care unit. The median SAP3-score was 56
(IQR 48 to 71), which correlated negatively
with time to death (spearmans rho -0.62,
p=0.045). 29 patients in the retro-group and 1
patient in the pro-group received hyperbaric
oxygen treatment (P=0.005).
20 patients in the retro-group and 13 in the
pro-group died after a median of 15 days
(IQR 2 to 271) (p=0.68).
Interpretation / Conclusion: Our results show an overall short time from
suspicion of NSTI to intervention. The preliminary
results find that the implementation of a NSTI
guideline has not had a significant effect on time-
delay to surgical intervention or short-term
survival.
57. Fatigue, fear of being mobilized and residual limb pain limits independent mobility and physiotherapy early after major dysvascular lower limb amputation.
Anja Løve Berger1, Morten Tange Kristensen1,2
1. Department of Physical and Occupational Therapy, Copenhagen University
Hospital, Bispebjerg-Frederiksberg and Department of Clinical Medicine,
University of Copenhagen, Denmark
2. Departments of Physiotherapy and Orthopedic Surgery, Copenhagen University
Hospital, Amager-Hvidovre, Denmark
Background: Patients with a major dysvascular lower
extremity amputation (LEA) are characterized by
multimorbidity and high risk of mortality. Early
mobilization, physiotherapy (PT) and achieving
independent mobility are key components in
enhanced recovery programs also for these
patients, but often challenged by lack of
compliance. However, knowledge of factors
limiting early mobility and participating in PT
after LEA is sparse.
Aim: To investigate patient reported factors limiting
the ability to achieve independency in basic
mobility and participate in the planned PT during
the first 3 days of PT after LEA.
Materials and Methods: A total of 60 consecutive patients with a
mean (SD) age of 73.7 (12.1) years that
underwent a LEA within a 7-month period
and treated according to an enhanced
program at a university hospital were
included. The Basic Amputee Mobility Score
(BAMS, 0-8 points) was used to evaluate the
patient’s independency in 4 basic mobility
activities: 1) getting from lying to sitting in
bed, 2) transfer from bed to wheelchair, 3)
indoor wheelchair mobility, and 4) from
wheelchair to standing on the non-
amputated leg. Pre-defined limitations for not
achieving a full BAMS score or inability to
complete planned PT were: residual limb
pain, pain elsewhere, fear of being
mobilized, fatigue, nausea, acute cognitive
dysfunction, or other, and noted on the first 3
days of PT.
Results: PT was started median postoperative Day1.
Only 5 patients were independent in BAMS
activity 2: transfer from bed to wheelchair, on PT
Day1. Primary limiting factors for the 55 patients
not independent were fatigue (44%) and fear of
being mobilized (33%). 36 patients completed
the planned PT on Day1, with the primary
limiting factors for non-compliers being fatigue
(38%) and pain in the residual limb (24%).
Interpretation / Conclusion: Fatigue and fear of being mobilized were the
most frequent limiting factors for independent
mobilization out of bed after LEA.
Correspondingly, fatigue and pain in the residual
limb restricted participation in the planned PT.
These findings can be utilized in a multimodal
perioperative setting to optimize treatment for
overcoming these barriers, potentially leading to
better compliance and outcomes.
58. Management of War Injuries at Aarhus University Hospital in 2022: Experience from 12 casualties admitted from Ukraine
Rehne Lessmann Hansen1, Per Hviid Gundtoft1, Juozas Petruskevicius1, Ole Juul1,2, Klaus Kjær Petersen1, Christen Ravn1,2
1. Traume og infektionssektoren, Ortopædkirurgisk Afdeling, Aarhus
Universitetshospital
2. Forsvarets Sanitetskommando
Background: Due to the war in Ukraine the number of
casualties and complex cases exceeds the
Ukrainian health service capacity. In
collaboration with Health authorities of EU’s
countries many injured patients were transferred
for further treatment in western countries,
including Denmark.
Aim: To report experience from treating war-related
musculoskeletal injuries at Aarhus University
Hospital (AUH).
Materials and Methods: All casualties referred to AUH due to traumatic
injuries suffered in Ukraine in 2022 were
prospectively included in this cohort study
focusing on injuries, treatment delay,
microbiology, treatment, mental status,
rehabilitation, and discharge.
Results: A total of 12 patients (male, 9-50 years) were
transferred to AUH with a mean delay of 66
(4-157) days after injury. Only one patient
arrived at daytime. Eight patients arrived
without relatives, and nine patients were only
able to speak Ukrainian or Russian.
On arrival to AUH, patients were isolated,
assessed and trauma scanned.
Most injuries involved the extremities (10
cases), but injuries also involved spine (1),
thorax (1), abdomen (2) and the brain (4).
Nine patients had multiple injuries.
Open wounds and colonization with CPO
were seen in nine patients. Two patients
arrived in sepsis and one with COVID.
Treatment measures were organised with
multidisciplinary approach. Total 35
operations were performed in the
orthopaedic (24 procedures), abdominal (8)
and neurosurgical (3) departments.
Mean hospital stay was 33 days and
indications for prolonged admission includes
multiple operations, chronic infections,
complications, malnutrition, and specialized
physical and psychological rehabilitation.
None of the patients were amputated, and
only three patients were discharged in
wheelchair. Three pts were discharged back
to Ukraine, whereas the rest were either
rehabilitated at local hospitals or in a
municipal setting.
Interpretation / Conclusion: Several patients had a complex fracture-related
infections that most likely could have been
avoided if the patients were referred directly to
Denmark after primary stabilization in Ukraine.
We suggest sharing the efforts and experience
in a few multidisciplinary centres where patients
could also benefit from each other’s company.
59. Epidemiology of first-time major lower extremity amputations – A Danish Nationwide study from 2010 to 2021.
Anna Trier Heiberg Brix1,2, Katrine Hass Rubin2,3, Tine Nymark1,2, Hagen Schmal1,4, Martin Lindberg-Larsen1,2
1. Department of Orthopedic Surgery and Traumatology, Odense University Hospital
2. Department of Clinical Research, University of Southern Denmark
3. OPEN - Open Patient Data Explorative Network, Odense University Hospital and
University of Southern Denmark
4. Department of Orthopedics and Traumatology, University Medical Center Freiburg
Background: Major lower extremity amputations (MLEA), defined
as amputation above the ankle, are common
procedures. Potential changes in surgical strategy
and patient characteristics over time have not been
described previously.
Aim: The aim of this study was to describe the incidence
rates and surgical strategies of first-time MLEAs
from 2010 to 2021. Furthermore, to describe patient
and surgical center demographics during the same
period.
Materials and Methods: This is an observational nationwide register study
including all first-time MLEAs performed in patients
=18 years from 2010 to 2021. Data were achieved
from the Danish National Patient Register and the
Danish National Prescription Database.
Results: A total of 12.669 first-time MLEA patients were
identified in the study period. The annual number
of first-time MLEAs each year was unchanged at
approx. 1000 annually during the study period. In
2021 the total incidence was 21.3/100.000 and
the adjusted incidence decreased by 2.3% (95%
CI 1.8-2.8) per year.
The frequency of transfemoral amputations
increased, whereas knee disarticulation and
transtibial amputation decreased.
The comorbidity burden and age at MLEA were
also unchanged during the study period. Within
the study period a total 20% of patients
underwent minor amputation, defined as below
or through the ankle, and a total 39% had
revascularization surgery prior to MLEA. There
was no change in annual rates throughout the
study period. The surgical centers performing
MLEA were reduced from 26 to 17 during the
study period.
Interpretation / Conclusion: We observed a decreasing incidence of first-time
MLEA in Denmark and a shift towards increased use
of transfemoral amputations. This trend was not
explained by higher age, increasing comorbidity
burden, or previous surgeries before first-time
MLEA, as these factors were constant. Whether the
change in surgical strategy is to the benefit of the
patients should be investigated further.
60. Comparing radiotherapy regime for limb sparing surgery with wide or marginal margin in the treatment for localized deep seated high grade soft tissue sarcomas in the extremities and trunk wall. A Retrospective study from 2000-2016.
Andrea Thorn1, Bodil Engelmann2, Ninna Pedersen3, Thomas Baad-Hansen4, Michael Mørk Petersen1
1 . Department of Orthopaedic Surgery, Rigshospitalet, University of Copenhagen;
2. Department of Oncology, Herlev Hospital;
3. Department of Oncology, Aarhus Universitetshospital;
4. Department of Orthopaedic Surgery, Aarhus Universitetshospital.
Background: Treatment of Soft tissue sarcomas (STS) is in
Denmark only practiced in two sarcoma centers:
Aarhus University Hospital (AUH) and
Rigshospitalet/Herlev Hospital (RH/HH). In 2018
the Danish Sarcoma Group approved a new
cancer guideline dealing with radiotherapy of
localized STS, and it was concluded that
radiotherapy combined with limb sparing surgery
with wide or marginal margin is the treatment of
choice for all localized deep-seated H-M STS.
The new guidelines are very similar to what has
been the clinical practice in AUH for many years
while the Sarcoma Center at RH/HH until 2018
has had a different more individualized approach
not always treating with radiation therapy if
tumors were removed with a wide margin
regardless of tumor size.
Aim: Evaluate the treatment of deep-seated high-grade
STS by comparing two different regimes of
postoperative radiotherapy treatment regarding local
recurrence (LR) and overall survival (OS).
Materials and Methods: We included the patients from the Danish
Sarcoma Registry, with newly diagnosed H-M
STS (Trojani 2+3) of the extremities or trunk wall
between Jan 1, 2000 and Dec 31, 2016, primary
surgery for a deep-seated (sub-fascial) tumor,
and age > 18 with.
The cohort was specifically validated regarding
LR and OS.
Statistics: Kaplan Meier survival analysis and
log-rank test for comparison of groups.
Results: A total of 732 patients (RH/HH: n=337, AUH:
n=395) with localized deep-seated H-M STS in
the extremities and trunk wall, were operated on
between 2000 and 2016. The last follow-up was
on 01/01/2023 giving a minimum follow-up of 6
years. 432 patients died during the follow-up
(RH/HH: n=201, AUH: n=231). The 5-year OS for
RH/HH was 55.8% (CI-95: 50.5-61.1) and 54,4%
(CI-95: 49.5-59.3) and no significant difference
could be found (p=1). The same result could be
found when looking at LR. 253 patients (RH/HH:
n=117), AUH: n=136) were diagnosed with LR
after their primary operation. The 5-year local
recurrence free survival for RH/HH was 68% (CI-
95 63-72-9) and 67.8% (CI-95 63.2-72.5) for
AUH and no difference could be found between
the centers (p=1).
Interpretation / Conclusion: There was no statistically significant difference in OS
or LR rates between patients treated at RH/HH and
AUH.
61. Bone Cement Implantation Syndrome in Patients Surgically Treated With Cemented Endoprostheses due to Metastatic Bone Disease of the Femur
Thea Hovgaard Ladegaard1, Michala Skovlund Sørensen1, Michael Mørk Petersen1, Jakob Stensballe2,3
1. Musculoskeletal Tumor section, Department of Orthopedic Surgery,
Rigshospitalet, University of Copenhagen
2. Department of Anaesthesiology and Trauma Centre, Rigshospitalet, Copenhagen
University Hospital, Denmark
3. Capital Region Blood Bank, Rigshospitalet, Copenhagen University Hospital,
Denmark
Background: Patients with bone metastases in the femur (BMf)
experience pathological fractures requiring
surgery with cemented endoprostheses (cEPR).
At the cementation process and prosthesis
insertion, patients are at risk of experiencing
hypoxia, hypotension, cardiac failure and
potentially cardiac arrest, known as bone cement
implantation syndrome (BCIS).
Aim: To investigate the incidence of BCIS in patients
surgically treated with cEPR due to BMf.
Materials and Methods: We retrospectively assessed all patients with BMf
operated with cEPR in two 18 months periods
2017 – 2018 (early cohort) and 2019 – 2020 (late
cohort). Data were obtained from medical
records. BCIS was classified 1-3 by degree of
hypotension, desaturation and occurrence of
pulmonary embolia, cardiac failure and/or death
in the period from cementation until 5 minutes
after. Patients with unknown time of cementation
were excluded (n=22). Fishers exact test
compared groups.
Results: We identified 165 patients, (79 in the early and
86 in the late cohort). In total 56/165 (34%)
experienced BCIS (33% in the early cohort vs
35% in the late cohort). The classification of
BCIS severity was: grade 1 (11% vs 21%), grade
2 (18% vs 14%) and grade 3 (3.8% vs 0%) in the
early and late cohort, respectively. A trend toward
an increase in mild BCIS (grade 1) and a
decrease in severe BCIS (grade 2+3) were seen
between the early and late cohort (p=0.068). The
use of vasopressors increased significantly from
59% to 86% between the two periods (p<0.001).
Interpretation / Conclusion: BCIS is occurring in more than 1/3 of patients
operated on for BMf with cEPR. Our study
showed a reduction in the severity of BCIS and
highlights the continued need to prevent BCIS in
patients with BMf.
62. Survival and recurrence of Angisosarcomas in the extremities and trunk wall A retrospective long-term population based follow-up study
Christina Holm1,2, Andrea Thorn1, Thomas Baad-Hansen2, Michael Mørk Petersen1
1The Musculoskeletal Tumor Section, The Department of Orthopedic Surgery,
Rigshospitalet, University of Copenhagen, Denmark, 2Department of Orthopedic
Surgery, Tumor Section, Aarhus University Hospital, Aarhus, Denmark
Background: Angiosarcoma is a rare tissue sarcoma,
representing approximately 1-2% of all soft
tissue sarcomas. Angiosarcomas origins from
endothelial cells hence classified as a vascular
neoplasm. Angiosarcomas arise at any
anatomic site with the vast majority being
located at cutaneous sites, primarily head/neck,
in particular the scalp. Angiosarcoma is a
understudied cancer with a suggested
increasing incidence and high mortality.
Aim: The purpose with present study was to make a
long-term population-based evaluation of overall
survival, risk of local recurrence and metastasis
in patients with newly diagnosed angiosarcomas
in the extremities and trunk wall.
Materials and Methods: We identified a retrospective population-based
consecutive cohort with newly diagnosed
angiosarcoma in the extremities or trunk wall.
Patients were included from The Danish
Sarcoma Registry from January 1st, 2000 and
December 31, 2016. Kaplan-Meier survival
analysis was used for evaluation of overall
patient survival. Competing risk analysis was
used for assessing cumulative incidence of
recurrence and metastasis. Patients were
followed until death or end of study (January 1,
2023) resulting in a minimum follow-up of 6
years.
Results: We included n=72 patients with a mean age of
66 (22-95) years (F/M=38/34). Fifteen patients
(21%) were alive at the end of study. Overall
survival was 33% (95%CI: 22%-44%) and 26%
(95%CI: 16%-36%) after 5, 10 years
respectively. We found no differences in overall
survival between patients + local recurrence or
+ metastasis (p=0.8), (p=0.2) respectively. The
cumulative incidence of local recurrence was
32% (95%CI: 21%-43%) and 33% (95%CI:
22%-44%) at 5 and 10 years respectively. The
cumulative incidence of metastasis was 13%
(95%CI: 5%-21%) and 14% (95%CI: 6%-23%)
after 5 and 10 year respectively.
Interpretation / Conclusion: Our long-term results from a population-based
cohort demonstrated that angiosarcoma is an
aggressive subtype of soft tissue sarcomas with
high risk of local recurrence and metastasizing.
The long-term overall prognosis is poor despite
aggressive treatment.
63. Magnitude of Surgery is not a Risk Factor for 30-day Mortality in Patients Treated for Metastatic Bone Disease in the Extremities
Thea Hovgaard Ladegaard1, Michael Mørk Petersen1, Michala Skovlund Sørensen1
1. Musculoskeletal Tumor Section, Department of Orthopedic Surgery, Rigshospitalet,
University of Copenhagen
Background: Surgical treatment of metastatic bone disease in the
extremities (BMex) is a tradeoff between preserving
limb function without posing a risk for survival. A
previous study (Sørensen et al., Medicine 2016)
fount that extended surgery is not a risk for 30-day
mortality and hypothesized that wide resection and
reconstruction might reduce the risk of postoperative
mortality.
Aim: To validate that the extent of the surgical trauma
does not increase the risk of 30-day mortality in
patients having surgery with endoprostheses (EPR)
or internal fixation (IF) for BMex and identify if IF
increases the risk of 30-day mortality.
Materials and Methods: A retrospective cohort study on a population-based
cohort having EPR or IF for BMex in the Capital
Region of Denmark Jan 2014-Dec 2019.
Intraoperative variables and patient demographics
were evaluated for association with 30-day mortality
by logistic regression analysis and Kaplan Meier
evaluated survival. We had no loss to follow-up.
Results: We identified 437 patients having surgical
treatment for BMex. Overall 30-days survival was
85% (95CI: 81-88). Univariate analysis identified
ASA score 3+4 (OR 3.50 [95CI: 1.68-7.3]),
Karnofsky <70 (OR 5.84 [95CI: 3.33-10.93]), fast
growth cancer (OR 3.97 [95CI: 2.3-6.86]),
visceral metastases (OR 2.86 [95CI: 1.55-5.28]),
multiple bone metastases (OR 2.38 [95CI: 1.10-
5.19]) and treatment at a secondary surgical
center (OR 1.88 [95CI: 1.11-3.18]) as risk factors
for 30-day mortality. Only male gender (OR 2.51
[95CI: 1.19-5.30]), ASA 3+4 (OR 3.2 [95%CI:
1.12-9.16]), Karnofsky <70 (OR 4.01 [95CI: 1.95-
8.23]), fast growth cancer (OR 3.5 [95CI: 1.62-
7.52]) and multiple bone metastases (OR 3.38
[95CI: 1.13-10.10]) were independent prognostic
factors for 30-day mortality in multivariate
analysis. No parameters describing the extent of
the surgical trauma were found to be associated
with 30-day mortality.
Interpretation / Conclusion: We confirmed our hypotheses about extent of
surgery, measured as blood loss, duration of surgery
and degree of bone resection, not being associated
with 30-day mortality. Further, we did not find IF as a
risk factor. Instead general health status of the
patient and extent of primary cancer disease
influenced survival post surgery.