- Research article
- Open Access
Treatment of pediatric supracondylar humerus fractures accompanied with pink pulseless hands
BMC Musculoskeletal Disorders volume 22, Article number: 26 (2021)
The optimal treatment for pediatric supracondylar humeral fractures accompanied with a pink pulseless hand is controversial. Some clinicians recommend close observation after closed reduction and percutaneous pinning of the fractures, while some recommend surgical exploration if the radial pulse is unpalpable. The present study aimed to analyze the benefits and outcomes of close observation for treating pediatric supracondylar humeral fractures with a pink pulseless hand.
Thirteen consecutive children presenting with a pink pulseless hand following supracondylar humeral fracture were enrolled in this study. Preoperative and postoperative color-flow Duplex ultrasound detection was used to assess brachial artery compromise in most cases. Urgent closed reduction and percutaneous pinning of the fractures were attempted first. Close observation was carried out when the hand was pink and pulseless with an absent radial pulse.
Preoperative color-flow Duplex ultrasound showed no disruption of the brachial artery in cases detected. Compression of the artery by the proximal fragment was observed in most cases, with one case of entrapment of the artery between fragments, and thrombus considered in two cases. All cases underwent urgent surgery, after which nine experienced immediate return of the radial pulse. The remaining four without a palpable pulse were managed with close observation and no deterioration of the vascular status was observed; therefore, no surgical exploration was performed. Postoperative color-flow Duplex ultrasound revealed continuity of the artery and rich collateral circulation. Patients completed an average of 4.5 years of follow-up, during which no major complications occurred. All patients achieved excellent limb function.
Our study demonstrates that close observation after urgent closed reduction and percutaneous pinning is a sufficient approach for the treatment of pediatric supracondylar humeral fractures accompanied with a pink pulseless hand. Surgical exploration is not necessary as long as the hand is warm and well perfused. Color-flow Duplex ultrasound is beneficial for assessing vascular compromise and determining treatment strategies.
Supracondylar humerus fractures (SHFs) are the most common fractures in children and account for approximately 50–70% of pediatric elbow fractures [1, 2]. Compromised vasculature occurs in 2.6–20% of cases of displaced SHFs in children [3,4,5,6], with two kinds of brachial artery injuries reported to be associated with SHFs: those presenting with a pale pulseless hand and those with a pink pulseless hand (PPH) which is well perfused without a palpable radial pulse [6,7,8]. While vascular compromise in elderly patients with SHFs is rare due to osteoporosis and low-energy trauma compared with pediatric patients, open reduction and plate fixation was recommended for satisfactory outcomes . In pediatric patients, urgent closed reduction and percutaneous pinning (CRPP) is the primary treatment in both situation, and vascular exploration is often required in the case of a pale pulseless hand [6,7,8, 10, 11]. However, the optimal treatment for a PPH in terms of whether to perform immediate vascular exploration or manage with close observation is controversial in cases where the radial pulse is still not palpable after CRPP [10, 11].
Some clinicians recommend aggressive surgical exploration and vascular reconstruction due to the concern that delaying reconstruction of the artery will lead to compartment syndrome, ischemic contracture, retarded development of the limb, cold intolerance, and so on [3, 8, 11,12,13,14,15]. Blakey et al. reported a high incidence of compartment syndrome associated with a PPH following SHFs , and the incidence has been reported to increase from 0.2–4.5% in cases with co-existing neurovascular compromise .
However, conservative management (close observation) is recommended as long as the hand is warm and well-perfused, with the reasoning that collateral circulation of the elbow joint will provide sufficient blood supply for the limb, and vascular exploration such only be carried out when deterioration of the circular status of the limb occurs [4,5,6,7, 12, 18,19,20,21,22,23]. Choi et al. reported that, among patients treatment for absent distal pulse following displaced SHFs, CRPP resulted in a good rate of return of palpable pulse after surgery or achievement of a pulseless but well-perfused status . Good outcomes were achieved without surgical exploration and no patients developed compartment syndrome. Scannell et al. described that CRPP for the treatment of perfused pulseless hand following displaced SHFs resulted in an immediate return of palpable pulse in 20% of patients, with normal radial pulse returning in all patients eventually . However, patent brachial arteries occurred in almost 75% of patients and brachial artery occlusion in 20%; collateral vessels were also found, severe arterial stenosis occurred in one patient, and cold intolerance during participation in ice hockey was reported in one patient. At an average of 20 months follow-up, there were no differences in arm circumference or length, elbow motion, muscle endurance, or grip strength between the injured and uninjured sides. The traditional conservative strategy of close observation has been used for SHFs since 1950s and relies on collateral circulation of the elbow joint [11, 20, 24,25,26]. Studies have demonstrated that the limb can kept alive with ligation of the injured brachial artery [27,28,29]. Strong collateral circulation has been identified using arteriography or ultrasound around the elbow after SHFs .
However, there have been few reports of the use color-flow Duplex ultrasound (CFDU) for the assessment of brachial artery compromise and the status of collateral circulation before and after surgical treatment of SHFs [11, 18, 30, 31]. The present study aimed to address this gap in the knowledge by analyzing the outcomes of conservative management (close observation) for pediatric SHFs with a PPH, and to evaluate the utility of CFDU for assessing lesions of the brachial artery.
We retrospectively reviewed all patients aged 14 years or below who were admitted for displaced SHFs from May 2014 to November 2018 at our pediatric orthopedic center. All patients underwent a thorough physical examination upon presentation at the emergency room to identify potential neurovascular compromise. Those with a pink pulseless hand which means brachial artery compromise would be enrolled in the study. Those without vascular compromise were excluded. This study and all its protocols were approved by the institutional review board.
Once vascular compromise was confirmed, the arm was immobilized with a temporary posterior cast in a position of 30°–40° of elbow flexion and CFDU for vascular detection ordered with an urgent CRPP arranged at the same time. But the CFDU detection failed in three cases because of noncooperation of the patients. All patients underwent CRPP under general anesthesia guided by fluoroscopy after which the arm was immobilized in 70° of elbow flexion with a posterior long-arm cast. Relaxant was administered to guarantee sufficient muscle relaxation and traction to ensure that separation of fragments was achieved, confirmed by anterior posterior fluoroscopy, to avoid aggravating the injured artery. Patients were closely observed for vascular status including monitoring of temperature, color, capillary refill, pain, palsy, and return of distal radial pulse using a portable ultrasound device on the pediatric ward. Further CFDU was carried out 1–2 days postoperatively to reassess the brachial artery and collateral circulation in most cases. The cast was removed 4 weeks postoperatively and functional exercises implemented. Pins were removed 1 week later. All patients were followed up and complications were recorded.
In total, 1267 patients underwent CRPP for SHFs at our center during the study period. Of these, 1079 were classified as Gartland Type III fractures, 13 of which (eight boys and five girls) presented with a PPH and were finally enrolled in the study. Open fractures were excluded. The average age of participants was 6 years (range: 2–11 years). All 13 cases were severe closed fractures with distal fragment posterolateral and posteromedial displacement in nine and four cases respectively. Physical examination revealed eight fractures to be accompanied with neurologic deficits: seven had median-nerve palsy (four had isolated anterior-interosseous-nerve palsy, three had only median-sensory-nerve palsy), one had radial-sensory-nerve palsy, and one had ulnar-motor-nerve palsy (Table 1). The average time from injury to operation was 12 hours (range: 1.5–48 hours), the average time of operation was 43 minutes (range: 25–65 minutes), and the average length of hospital stay was 5.4 days (range: 2–10 days).
Preoperative CFDU, carried out in ten of the thirteen patients, revealed compression of the brachial arteries by the tip of the proximal fragments in most cases, resulting in narrowing of the inner diameter of the vessel and decreased blood stream velocity. One case exhibited entrapment of the brachial artery between fragments. Thrombus formation was considered at the fracture site in two cases and collateral circulation was detected around the elbow joint in three. No disruption or active bleeding of the brachial artery was found in cases underwent detection. The blood flow velocities of the radial and ulnar arteries were decreased, demonstrating a venous spectrum (Table 2).
After CRPP, nine patients experienced immediate return of a palpable radial pulse although this was weaker than that of the contralateral side. This became normal in 2–9 hours postoperatively. The remaining four patients did not have a palpable radial pulse but a PPH was observed closely. Of these, palpable radial pulse returned in two within 16 and 54 hours. Radial pulse did not return before discharge for two patients; however, hands remained warm and well perfused and a radial pulse returned in 6 weeks in one patient and 1 month in the other. Seven patients underwent postoperative CFDU detection to reassess vascular status which revealed continuity of the arteries with no rupture or transection detected. One patient underwent CFDU four times which revealed a gradual increase of the blood flow velocity of the brachial, radial, and ulnar arteries and a gradual decease of collateral circulation (Fig. 1). No patient developed compartment syndrome or required surgical exploration.
The average follow-up period was 4.5 years. All thirteen patients experienced full recovery of the nerve injury with a palpable distal radial pulse as strong as the contralateral side. All patients had normal function of the elbow joints and no obvious scars, cosmetic deformities, ischemic contractures, disturbance of growth, exercise-induced ischemia, cold intolerance, or other abnormalities was observed.
The decision of whether to undertake surgical exploration for SHFs is a subject of some debate presenting with a PPH [11, 12]. Some clinicians recommend aggressive exploration and vascular reconstruction [3, 8, 11, 13,14,15] while others recommend close observation after urgent CRPP [4,5,6,7, 12, 18,19,20,21,22,23]. The present study demonstrates the benefits of a strategy of close observation following CRPP for the treatment of SHFs presenting with a PPH.
Many studies have described good results of this strategy and few complications [5, 6, 18, 22, 32]. Louahem et al. treated 68 patients with vascular compromise (63 of whom with pulseless perfused hand) with CRPP followed by close observation. Forty-two patients had a palpable radial pulse immediately after CRPP, eighteen experienced return of radial pulse from a few hours to 11 days postoperatively. Three patients required immediate surgical exploration for ischemic signs after unsuccessful reduction, which revealed incarceration of the brachial artery between fragments. With an average of 8.4 years of follow-up, all patients achieved normal circulatory status including a palpable radial pulse. No complications such as limb length discrepancy, cold intolerance, or claudication were observed .
Our results agree well with those of the above described studies; all 13 patients who presented with a PPH underwent urgent CRPP. Immediate return of radial pulse was observed in most cases, good capillary refill was detected in those where radial pulse was not palpable, and all patients had a palpable radial pulse at the final follow-up with no complications observed.
Despite the outcomes of conservative management, many surgeons—especially vascular or microsurgical surgeons—tend to recommend surgical exploration and vascular reconstruction after CRPP for a PPH, with good results reported [10, 14, 15]. Immediate surgical exploration before fracture reduction has even been recommended , although disadvantages of the procedure have been reported to include a long scar and the occurrence of re-occlusion and stenosis of the brachial artery [29, 30].
Surgical exploration is recommended for three main reasons: the first is that ligation of an injured brachial artery is considered to be associated with a high amputation rate based on war-time reports [11, 33]. However, these cases are very different to SHFs, in which the arm can be kept alive even with ligation of the brachial artery due to the collateral circulation [20, 27,28,29]. Two of our cases underwent CRPP nearly 2 days after injury because of neglect of artery compromise and late referral; however, the pulse recovered in 6 hours in both. This confirms the suggestion from previous studies that collateral circulation is sufficient to support the vitality of a PPH following SHFs, even without fracture reduction.
The second reason is the concern that delayed vascular exploration and reconstruction for a PPH following SHFs will lead to compartment syndrome , Volkmann ischemic contractures , vasomotor instability , forearm claudicating [28, 36], cold intolerance [5, 37], thrombus embolization , or retarded development of the limb . Blakey’s study showed high incidence of compartment syndrome. However, the cases in Blakey’s study were referred in a mean time of 3 months (4 days to 3 years) after injury, with late diagnosis . Other studies have shown compartment syndrome following SHFs to be associated with over-swelling, delayed fracture reduction, and elbow flexion of more than 90°; absence of radial pulse alone is not an indication for exploration if there are no other signs of ischemia [40,41,42]. All cases of retarded development involve the lower limb, and are therefore not related to SHFs . Furthermore, the main area of potential growth in the upper limb is not the elbow . Other complications that have been reported such as vasomotor instability, forearm claudicating, and cold intolerance were either from case reports or a single case in a series [5, 28, 35,36,37].
The third reason for recommending surgical exploration is the lack of long-term follow-up data and sufficient cases to support the superiority of conservative management, which results in an arm relying on collateral circulation only [10, 30, 31]. However, collateral circulation around the elbow after SHFs has been shown to be sufficient to maintain the limb, with good long-term results [6, 18].
Making the decision of whether to perform surgical exploration requires accurate evaluation of the vascular compromise. There are several ways to evaluate such compromise, including arteriography, CFDU, computed tomography angiography, and magnetic resonance imaging, with the first two being used most often in clinical work. Arteriography can reveal the type of vascular compromise such as compression, entrapment, obstruction, or disruption; performed intra-operatively this approach can avoid unnecessary exploration . Pre-operative arteriography has no benefit because it only confirms a known diagnosis and will delay exploration without usually contributing to decisions regarding clinical management [11, 30]. The disadvantages of arteriography include its invasive nature and the risk of hemorrhage at the puncture site, allergic reaction to the contrast agent, and temporary loss of distal pulse . In contrast, CFDU is noninvasive and easily attainable. A comprehensive pre-operative physical examination is sufficient for assessing compromise of the brachial artery , but post-operative CFDU is useful for determining the severity of arterial compromise and informing treatment . In our center, we do not perform vascular exploration where CFDU does not show disruption of the brachial artery and perform post-operative CFDU to reassess the vascular status where aggravation of artery compromise occurred during CRPP and to confirm the continuity of the artery. We believe that intra-operative CFDU immediately after CRPP is beneficial for deciding whether to perform surgical exploration. In our practice, vascular exploration is performed if disruption of the artery is revealed by CFDU; otherwise, close observation will be carried out.
A survey by the British Society for Children’s Orthopedic Surgery showed that only 16% of members would perform vascular exploration immediately after CRPP in the case of a PPH . A recent systematic review comparing two different strategies suggested that CRPP should be the first-line approach for SHFs with either a pale or pink pulseless hand. In the case of pale pulseless hands, there is a chance that radial pulse may return after CRPP; otherwise, immediate vascular exploration is strongly indicated. In a PPH, the traditional strategy of close observation should not be revisited as long as there are no signs of deterioration of the vascular status .
The present study has some limitations which should be acknowledged, including the retrospective analysis of data, lack of sufficient cases, and lack of results of final and intra-operative CFDU. Future studies are warranted involving larger cohorts recruited from multiple centers, and the development of an animal model would be beneficial to study the collateral circulation of the elbow and long-term effects of ligation of the brachial artery on limb function and development.
This study demonstrates that the traditional strategy of close observation should be the first choice for treatment of a PPH after CRPP following SHFs unless there are signs of deterioration of vascular status. CFDU is beneficial for assessing vascular compromise and determining treatment strategies. A close observation will be enough once the continuity of the brachial artery is confirmed by CFDU because of the existence of rich collateral circulation around the elbow joint.
Availability of data and materials
The data and materials in the current study are available from the corresponding author on reasonable request.
Supracondylar humerus fractures;
Pink pulseless hand;
Closed reduction and percutaneous pinning;
Color-flow Duplex ultrasound;
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Xie, Lw., Wang, J. & Deng, Zq. Treatment of pediatric supracondylar humerus fractures accompanied with pink pulseless hands. BMC Musculoskelet Disord 22, 26 (2021). https://doi.org/10.1186/s12891-020-03877-z
- Supracondylar humeral fracture
- Vascular compromise
- Pink pulseless hand