北京大学学报（医学版）最新文献

Objective: To analyze the clinical characteristics of patients with severe fall injury and explore the prehospital factors affecting the injury severity score (ISS).

Methods: Clinical data of severe trauma patients with fall injury and ISS≥16 from January 2018 to December 2020 were retrieved from trauma database of Peking University People' s Hospital. The patients' age, gender, suicidal tendencies, psychiatric disorders, fall height, properties of the impact surface, the body part hitting the ground, abbreviated injury scale, Glasgow coma scale (GCS), length of stay in intensive care unit (ICU), operation were collected. And the in-hospital mortality were calculated. Univariate analysis and multiple linear regression models were used to analyze the relationship between the above factors and ISS. The patients' GCS, length of stay in ICU, surgery, and in-hospital mortality were collected to analyze the general clinical characteristics of patients.

Results: A total of 160 patients were finally eligible, including 138 males and 22 females, with an average age of (45.56±15.85) years. Among the 160 patients, there were 36 cases (22.50%) with suicidal tendencies, 12 cases (7.50%) with psychiatric disorders. Their average fall height was (7.20±8.33) meters, and 48 cases (30.00%) hit the soft contact medium. 40 cases (25.00%) with impact on the head at the ground, lower limbs in 26 cases (16.25%), ventral in 16 cases (10.00%), dorsal in 40 cases (25.00%), lateral in 38 cases (23.75%). The patients' ISS was 22.8±6.85, GCS was 13.49±3.39, lengths of ICU stays were (9.96±8.12) days, and 142 (88.75%) patients underwent surgery, 8 in-hospital deaths were all due to head trauma, with an in-hospital mortality rate of 5.00%. Univariate analysis suggested that the main factors influencing ISS were the presence of suicidal tendencies (P=0.01) and the site of impact on the ground (P=0.02). Multiple linear regression analysis indicated that suicidal tendencies and head impact on the ground were in-fluential factors for high ISS.

Conclusion: Collecting prehospital information of patients with fall injuries, such as whether they have suicidal tendencies and whether they hit the ground with their heads, can effectively predict the severity of patients' injuries, which is conducive to early diagnosis, early care, and early treatment, thus reducing preventable death.

Rheumatoid arthritis (RA) and myasthenia gravis (MG) are two distinct autoimmune diseases. Compared with the general population, the incidence of RA is notably higher among patients with MG. Similarly, the rate of MG in patients diagnosed with RA is also significantly increased. In this report, we presented an elderly female patient with a history usage of long-term glucocorticoid and conventional synthetic disease-modifying antirheumatic drugs (csDMARDs), whose RA symptoms remained inadequately controlled. She later exhibited drooping of the right eyelid and double vision, leading to a diagnosis of ocular myasthenia gravis (OMG). Then, we made a literature review and found that the RA patients with co-existing MG were relatively more common in middle-aged and elderly women, and most of them did not have thymoma. Thymoma wasn ' t found in our patient, which was consistent with the cli-nical characteristics of RA complicated with MG reported in previous reports. In addition, there was li-mited treatment experience in patients with both RA and MG. The treatment stratergies for RA or MG included glucocorticoids and immunosuppressants. Among the 18 patients we analyzed, 8 patients expe-rienced relief after csDMARDs, while other 8 patients received biologics or targeted DMARDs, including tumor necrosis factor inhibitors (TNFi) in 5 cases, JAK inhibitors in 2 cases, and B-cell depletion therapy (rituximab) in 2 cases. What called for special attention was that one RA patient was diagnosed with MG after using 23 months of methotrexate and 6 weeks of etanercept (TNFi), with rituximab 1 000 mg for the first time, followed by 500 mg every 6 months, and finally both RA and MG were well controlled. For the patient in this study, MG symptoms improved with increased dosage of prednisone. In order to tapper the dose of glucocorticoid, it was necessary for more potent immunosuppressant for both RA and MG. Given her history of cardiac conditions, JAK inhibitors were not considered, and due to the uncertain efficacy of TNFi, we chose to administer low-dose rituximab (100 mg). Subsequent follow-up revealed stable conditions for both RA and MG, allowing for discontinuance of glucocorticoid after 5 months. It reflected the potential efficacy and cost-effectiveness of low-dose, long-interval rituximab in treating RA patients combined with MG, while it also minimized infection risks. However, the duration for subsequent infusions remained uncertain and required further observation. In conclusion, RA combined with MG is rare. For patients exhibiting poor responses to csDMARDs, low-dose, long-interval rituximab might be a promising treatment option.

We reported the diagnostic and therapeutic process of a young male patient with systemic lupus erythematosus (SLE) who presented with severe hyponatremia as the main manifestation upon admission, and analyzed and discussed the case. The patient was a 19-year-old young male with a subacute course of disease, fever ≥38.3 ℃ that could not be explained by other causes, acute and subacute cutaneous lupus erythematosus, oral ulcers, arthritis, leukopenia (< 4×10⁹/L), low C3+low C4, and positive anti-double-stranded DNA (anti-dsDNA). According to the 2019 American College of Rheumatology/European League Against Rheumatism (ACR/EULAR) classification criteria, the score was 27 points. The patient was admitted to the hospital with SLE. After admission, further diagnosis of lupus was confirmed, excluding infection, tumor, endocrine disease, etc. Hyponatremia was the main complication of this lupus patient. Hyponatremia was a rare complication of lupus, only a few cases have been reported. In this study, the paient ' s blood osmotic pressure was significantly reduced, which was considered to be hypotonic hyponatretic, urine osmotic pressure increased, maximum urine dilution caused by excessive water intake such as primary polydipsia, hypoosmotic fluid intake, and beer drinking were excluded, and 24 h urine volume and sodium were improved. The urinary sodium concentration was close to 20 mmol/L although with severe hyponatremia, considering the possibility of isovolemic hypotonic hyponatremia, the syndrome of improper secretion of antidiuretic hormone or adrenal cortical insufficiency. The patient had no manifestations, such as hypotension, typical site pigmentation, and high potassium, and there was little possibility of adrenal cortical insufficiency, and syndrome of inappropriate antidiuretic hormone secretion (SIADH) was considered for hyponatremia in the patient. The etiological mechanism of hyponatremia in lupus patients is not clear, but it is related to acute kidney injury, drugs and systemic inflammation. In this case, we reported for the first time that SLE was associated with abnormal hypothalamic signals, suggesting a possible mechanism of lupus hyponatremia. The patient underwent water restriction, intravenous and oral sodium supplementation, and the blood sodium quickly returned to normal after pulse therapy. The abnormal signal of the head magnetic resonance imaging (MRI) fornix column was improved after 1 month of treatment, further confirming our diagnosis. SLE complicated with hyponatremia is rare, but severe hyponatremia can be life-threatening, and attention should be paid to it. The possibility of neuropsychiatric lupus should be vigilant in patients with lupus combined with hyponatremia.

Objective: To evaluate the intra-fraction and inter-fraction positional deviations in head and neck tumor patients undergoing intensity-modulated radiation therapy (IMRT) guided by cone-beam CT (CBCT), as well as the correction capability and stability of the HexaPOD evo RT 6D couch in addressing these deviations.

Methods: From May 2019 to April 2022, 59 consecutive patients with head and neck tumors were enrolled at the Department of Radiation Oncology, Peking University Third Hospital.Using the Elekta AXESSE image-guided stereotactic treatment system, a pre-treatment CBCT scan was performed, followed by bone window mode registration with the planning reference images.Deviations were corrected automatically or manually on the 6D couch, followed by a second CBCT scan for confirmation of the deviation correction.Positional errors in translation (X, Y, Z directions) and rotation (Rx, Ry, Rz directions) were recorded before and after correction, and intra-fraction and inter-fraction positional errors were analyzed.

Results: Positional error data before and after correction of the 6D couch were successfully obtained and corrected online in 506 CBCT scans.The maximum positional errors before and after correction were 0.90 cm to 0.04 cm (X direction), 1.74 cm to 0.09 cm (Y direction), 1.80 cm to 0.09 cm (Z direction), and 2.90° to 0.14°(Rx direction), 3.00° to 0.15°(Ry direction), 3.00° to 0.15°(Rz direction), respectively.The mean absolute values of translational (X, Y, Z directions) and rotational (Rx, Ry, Rz directions) errors significantly decreased after online correction, from 0.18 cm, 0.22 cm, 0.25 cm, and 0.82°, 1.11°, 0.73° to 0.01 cm, 0.01 cm, 0.01 cm, and 0.04°, 0.06°, 0.04°(all P values < 0.001).After correction, the frequencies of translational errors less than 0.10 cm in the X, Y, Z directions were 99.60%, 98.62%, and 95.45%, respectively, and the frequencies of rotational errors less than 0.2° were all above 99.80%.

Conclusion: Online correction combined with CBCT and the 6D couch significantly reduces both translational and rotational positional errors in patients undergoing head and neck radiation therapy, greatly enhancing the precision of treatment.

Objective: To investigate the clinical characteristics of overlapping syndromes of low muscle mass in Chinese patients with rheumatoid arthritis (RA) and their impact on physical function.

Methods: Consecutive patients with RA were recruited from September 2019 to April 2024 at Department of Rheumatology and Immunology, Sun Yat-Sen Memorial Hospital. Clinical data including disease acti-vity, physical function and radiographic assessment were collected. All patients also finished measurement of body composition, grip strength, and gait speed, and overlapping syndromes of low muscle mass as well as malnutrition, sarcopenia, sarcopenic obesity, and cachexia were evaluated. The Stanford health assessment questionnaire- disability index (HAQ-DI) was used to evaluate physical function. Logistic regression was used to analyze the related factors of physical dysfunction.

Results: A total of 1 016 RA patients were recruited. Their mean age was (52.4±12.5) years, and 82.5% were female. There were 557 cases (54.8%) with overlapping syndromes of low muscle mass and all of them were malnutrition. On this basis, 326 cases (32.1%) exhibited sarcopenia, 124 (12.2%) sarcopenic obesity, and 33 (3.2%) cachexia. There were 584 (57.4%) of RA patients having physical dysfunction, with varying degrees of severity 421 (41.4%) mild, 124 (12.2%) moderate, and 39 (3.8%) severe. Compared with patients without overlapping syndromes of low muscle mass (n=459) or with malnutrition only (n=231), RA patients with both malnutrition and sarcopenia (n=326) had significantly higher core disease activity indicators and higher rate of physical dysfunction (69.6% vs. 42.0% vs. 56.6%). However, compared with patients without overlapping syndromes of low muscle mass, patients with malnutrition only had lower HAQ-DI score (median 0.0 vs. 0.1) and lower rate of physical dysfunction (42.0% vs. 56.6%). Multivariate Logistic regression analysis showed that simultaneously overlapping malnutrition and sarcopenia were associated factors of physical dysfunction (OR=2.021, 95%CI: 1.067-3.828), but malnutrition only was not.

Conclusion: Simultaneously overlapping malnutrition and sarcopenia can deteriorate disease activity and physical dysfunction in RA patients. The screening and evaluation of overlapping syndromes of low muscle mass, especially sarcopenia should be emphasized in patients with RA.

Objective: To investigate the clinical and radiographic outcomes of 3 years after partial pulpotomy with iRoot BP Plus in immature permanent teeth with complex crown fracture and to provide refe-rence for the clinical application.

Methods: The study was prospectively designed and 104 immature permanent teeth with complex crown fracture were randomly allocated into two groups (n=52). The experiment group received iRoot BP Plus as the pulp capping agent while the control group received calcium hydroxide as the pulp capping agent. After partial pulpotomy, all teeth were clinically and radiographically assessed at the end of 1, 3, 6, 12, 18, 24, 30, and 36 months. The success rate in the two groups was evaluated to see if there was significant difference. The root canal wall thickness in the treated teeth was compared both between the groups and within the groups with those of the corresponding healthy teeth on the opposite side, in the same patient.

Results: Excluding those lost to follow-up, there were 44 teeth in calcium hydroxide group (8 teeth accounting for 15.4% were lost to follow up) and 45 teeth in iRoot BP Plus group (7 teeth accounting for 13.5% were lost to follow up) in the end. There was no intergroup difference in the success rate between calcium hydroxide group and iRoot BP Plus group (per-protocol analysis: 80% vs. 87%; intent-to-treat analysis: 67% vs. 75%). The non-inferiority margin was -10%. The 95% confidence interval of the difference in success rate was -8% to 22%. There was no significant difference in root development between the experimental teeth and contralateral control teeth. The thickness of upper 1/3 root canal in the iRoot BP Plus group was thinner than that in the CH group [(1.82±0.21) mm vs. (1.91±0.20) mm, P=0.047].

Conclusion: iRoot BP Plus used in pulpotomy can effectively preserve the living pulp and promote the development of root in the young permanent teeth with complex crown fracture.

Objective: To comprehensively assess the occurrence of residual symptoms in patients with axial spondyloarthritis who have successfully attained the treatment goal of low disease activity, and to conduct a thorough analysis of the related factors.

Methods: An analysis was performed on axial spondyloarthritis patients who achieved low disease activity for the first time during their visits at the Rheumatology and Immunology Department of Peking University Third Hospital, spanning from May 1, 2021, to February 29, 2024. Based on the ankylosing spondylitis disease activity score-C-reactive protein (ASDAS-CRP), the patients who achieved low disease activity were divided into a non-remission low disease activity group and a remission group. The occurrence of residual fatigue and pain symptoms in both groups was assessed, and binary Logistic regression analysis was used to evaluate the related factors.

Results: In the study, 201 patients achieved low disease activity during treatment. The gender distribution was skewed towards males, with 151 male patients (75.1%) and 50 female patients (24.9%). The median age of the patients who achieved low disease activity was 32.0 (28.0, 37.0) years, and the median disease duration was 6.7 (3.8, 11.5) years. Notably, 140 patients (69.7%) achieved low disease activity but did not experience complete remission, while 61 patients (30.3%) attained remission. A substantial proportion of the patients, 45.8%, reported residual fatigue visual analogue scale (VAS) ≥4, with a marked difference between the non-remission low disease activity group and the remission group (53.6% vs. 27.9%, P=0.001). Similarly, 24.4% of the patients had residual pain VAS ≥4, with a significant disparity between the non-remission low disease activity group and the remission group (30.0% vs. 11.5%, P=0.005). Binary Logistic regression analysis revealed that C-reactive protein levels had a notable negative influence on residual fatigue symptom (B=-0.142, P=0.008, OR=0.868), whereas ASAS-HI had a positive effect on residual fatigue (B=0.288, P < 0.001, OR=1.334). Gender was found to have a significant impact on residual pain symptoms, with females exhibiting a higher risk (B=1.135, P=0.002, OR=3.112).

Conclusion: The residual fatigue and pain symptoms are common in axial spondyloarthritis patients who have achieved low disease activity, particularly among female patients. More assessment and recognition of the residual disease burden in these patients will be needed to optimize the treatment strategies.